'use strict'; Object.defineProperty(exports, '__esModule', { value: true }); const beforeExpr = true; const startsExpr = true; const isLoop = true; const isAssign = true; const prefix = true; const postfix = true; class TokenType { constructor(label, conf = {}) { this.label = void 0; this.keyword = void 0; this.beforeExpr = void 0; this.startsExpr = void 0; this.rightAssociative = void 0; this.isLoop = void 0; this.isAssign = void 0; this.prefix = void 0; this.postfix = void 0; this.binop = void 0; this.updateContext = void 0; this.label = label; this.keyword = conf.keyword; this.beforeExpr = !!conf.beforeExpr; this.startsExpr = !!conf.startsExpr; this.rightAssociative = !!conf.rightAssociative; this.isLoop = !!conf.isLoop; this.isAssign = !!conf.isAssign; this.prefix = !!conf.prefix; this.postfix = !!conf.postfix; this.binop = conf.binop != null ? conf.binop : null; this.updateContext = null; } } const keywords = new Map(); function createKeyword(name, options = {}) { options.keyword = name; const token = new TokenType(name, options); keywords.set(name, token); return token; } function createBinop(name, binop) { return new TokenType(name, { beforeExpr, binop }); } const types = { num: new TokenType("num", { startsExpr }), bigint: new TokenType("bigint", { startsExpr }), decimal: new TokenType("decimal", { startsExpr }), regexp: new TokenType("regexp", { startsExpr }), string: new TokenType("string", { startsExpr }), name: new TokenType("name", { startsExpr }), eof: new TokenType("eof"), bracketL: new TokenType("[", { beforeExpr, startsExpr }), bracketHashL: new TokenType("#[", { beforeExpr, startsExpr }), bracketBarL: new TokenType("[|", { beforeExpr, startsExpr }), bracketR: new TokenType("]"), bracketBarR: new TokenType("|]"), braceL: new TokenType("{", { beforeExpr, startsExpr }), braceBarL: new TokenType("{|", { beforeExpr, startsExpr }), braceHashL: new TokenType("#{", { beforeExpr, startsExpr }), braceR: new TokenType("}"), braceBarR: new TokenType("|}"), parenL: new TokenType("(", { beforeExpr, startsExpr }), parenR: new TokenType(")"), comma: new TokenType(",", { beforeExpr }), semi: new TokenType(";", { beforeExpr }), colon: new TokenType(":", { beforeExpr }), doubleColon: new TokenType("::", { beforeExpr }), dot: new TokenType("."), question: new TokenType("?", { beforeExpr }), questionDot: new TokenType("?."), arrow: new TokenType("=>", { beforeExpr }), template: new TokenType("template"), ellipsis: new TokenType("...", { beforeExpr }), backQuote: new TokenType("`", { startsExpr }), dollarBraceL: new TokenType("${", { beforeExpr, startsExpr }), at: new TokenType("@"), hash: new TokenType("#", { startsExpr }), interpreterDirective: new TokenType("#!..."), eq: new TokenType("=", { beforeExpr, isAssign }), assign: new TokenType("_=", { beforeExpr, isAssign }), incDec: new TokenType("++/--", { prefix, postfix, startsExpr }), bang: new TokenType("!", { beforeExpr, prefix, startsExpr }), tilde: new TokenType("~", { beforeExpr, prefix, startsExpr }), pipeline: createBinop("|>", 0), nullishCoalescing: createBinop("??", 1), logicalOR: createBinop("||", 1), logicalAND: createBinop("&&", 2), bitwiseOR: createBinop("|", 3), bitwiseXOR: createBinop("^", 4), bitwiseAND: createBinop("&", 5), equality: createBinop("==/!=/===/!==", 6), relational: createBinop("/<=/>=", 7), bitShift: createBinop("<>/>>>", 8), plusMin: new TokenType("+/-", { beforeExpr, binop: 9, prefix, startsExpr }), modulo: new TokenType("%", { beforeExpr, binop: 10, startsExpr }), star: new TokenType("*", { binop: 10 }), slash: createBinop("/", 10), exponent: new TokenType("**", { beforeExpr, binop: 11, rightAssociative: true }), _break: createKeyword("break"), _case: createKeyword("case", { beforeExpr }), _catch: createKeyword("catch"), _continue: createKeyword("continue"), _debugger: createKeyword("debugger"), _default: createKeyword("default", { beforeExpr }), _do: createKeyword("do", { isLoop, beforeExpr }), _else: createKeyword("else", { beforeExpr }), _finally: createKeyword("finally"), _for: createKeyword("for", { isLoop }), _function: createKeyword("function", { startsExpr }), _if: createKeyword("if"), _return: createKeyword("return", { beforeExpr }), _switch: createKeyword("switch"), _throw: createKeyword("throw", { beforeExpr, prefix, startsExpr }), _try: createKeyword("try"), _var: createKeyword("var"), _const: createKeyword("const"), _while: createKeyword("while", { isLoop }), _with: createKeyword("with"), _new: createKeyword("new", { beforeExpr, startsExpr }), _this: createKeyword("this", { startsExpr }), _super: createKeyword("super", { startsExpr }), _class: createKeyword("class", { startsExpr }), _extends: createKeyword("extends", { beforeExpr }), _export: createKeyword("export"), _import: createKeyword("import", { startsExpr }), _null: createKeyword("null", { startsExpr }), _true: createKeyword("true", { startsExpr }), _false: createKeyword("false", { startsExpr }), _in: createKeyword("in", { beforeExpr, binop: 7 }), _instanceof: createKeyword("instanceof", { beforeExpr, binop: 7 }), _typeof: createKeyword("typeof", { beforeExpr, prefix, startsExpr }), _void: createKeyword("void", { beforeExpr, prefix, startsExpr }), _delete: createKeyword("delete", { beforeExpr, prefix, startsExpr }) }; const lineBreak = /\r\n?|[\n\u2028\u2029]/; const lineBreakG = new RegExp(lineBreak.source, "g"); function isNewLine(code) { switch (code) { case 10: case 13: case 8232: case 8233: return true; default: return false; } } const skipWhiteSpace = /(?:\s|\/\/.*|\/\*[^]*?\*\/)*/g; function isWhitespace(code) { switch (code) { case 0x0009: case 0x000b: case 0x000c: case 32: case 160: case 5760: case 0x2000: case 0x2001: case 0x2002: case 0x2003: case 0x2004: case 0x2005: case 0x2006: case 0x2007: case 0x2008: case 0x2009: case 0x200a: case 0x202f: case 0x205f: case 0x3000: case 0xfeff: return true; default: return false; } } class Position { constructor(line, col) { this.line = void 0; this.column = void 0; this.line = line; this.column = col; } } class SourceLocation { constructor(start, end) { this.start = void 0; this.end = void 0; this.filename = void 0; this.identifierName = void 0; this.start = start; this.end = end; } } function getLineInfo(input, offset) { let line = 1; let lineStart = 0; let match; lineBreakG.lastIndex = 0; while ((match = lineBreakG.exec(input)) && match.index < offset) { line++; lineStart = lineBreakG.lastIndex; } return new Position(line, offset - lineStart); } class BaseParser { constructor() { this.sawUnambiguousESM = false; this.ambiguousScriptDifferentAst = false; } hasPlugin(name) { return this.plugins.has(name); } getPluginOption(plugin, name) { if (this.hasPlugin(plugin)) return this.plugins.get(plugin)[name]; } } function last(stack) { return stack[stack.length - 1]; } class CommentsParser extends BaseParser { addComment(comment) { if (this.filename) comment.loc.filename = this.filename; this.state.trailingComments.push(comment); this.state.leadingComments.push(comment); } adjustCommentsAfterTrailingComma(node, elements, takeAllComments) { if (this.state.leadingComments.length === 0) { return; } let lastElement = null; let i = elements.length; while (lastElement === null && i > 0) { lastElement = elements[--i]; } if (lastElement === null) { return; } for (let j = 0; j < this.state.leadingComments.length; j++) { if (this.state.leadingComments[j].end < this.state.commentPreviousNode.end) { this.state.leadingComments.splice(j, 1); j--; } } const newTrailingComments = []; for (let i = 0; i < this.state.leadingComments.length; i++) { const leadingComment = this.state.leadingComments[i]; if (leadingComment.end < node.end) { newTrailingComments.push(leadingComment); if (!takeAllComments) { this.state.leadingComments.splice(i, 1); i--; } } else { if (node.trailingComments === undefined) { node.trailingComments = []; } node.trailingComments.push(leadingComment); } } if (takeAllComments) this.state.leadingComments = []; if (newTrailingComments.length > 0) { lastElement.trailingComments = newTrailingComments; } else if (lastElement.trailingComments !== undefined) { lastElement.trailingComments = []; } } processComment(node) { if (node.type === "Program" && node.body.length > 0) return; const stack = this.state.commentStack; let firstChild, lastChild, trailingComments, i, j; if (this.state.trailingComments.length > 0) { if (this.state.trailingComments[0].start >= node.end) { trailingComments = this.state.trailingComments; this.state.trailingComments = []; } else { this.state.trailingComments.length = 0; } } else if (stack.length > 0) { const lastInStack = last(stack); if (lastInStack.trailingComments && lastInStack.trailingComments[0].start >= node.end) { trailingComments = lastInStack.trailingComments; delete lastInStack.trailingComments; } } if (stack.length > 0 && last(stack).start >= node.start) { firstChild = stack.pop(); } while (stack.length > 0 && last(stack).start >= node.start) { lastChild = stack.pop(); } if (!lastChild && firstChild) lastChild = firstChild; if (firstChild) { switch (node.type) { case "ObjectExpression": this.adjustCommentsAfterTrailingComma(node, node.properties); break; case "ObjectPattern": this.adjustCommentsAfterTrailingComma(node, node.properties, true); break; case "CallExpression": this.adjustCommentsAfterTrailingComma(node, node.arguments); break; case "ArrayExpression": this.adjustCommentsAfterTrailingComma(node, node.elements); break; case "ArrayPattern": this.adjustCommentsAfterTrailingComma(node, node.elements, true); break; } } else if (this.state.commentPreviousNode && (this.state.commentPreviousNode.type === "ImportSpecifier" && node.type !== "ImportSpecifier" || this.state.commentPreviousNode.type === "ExportSpecifier" && node.type !== "ExportSpecifier")) { this.adjustCommentsAfterTrailingComma(node, [this.state.commentPreviousNode]); } if (lastChild) { if (lastChild.leadingComments) { if (lastChild !== node && lastChild.leadingComments.length > 0 && last(lastChild.leadingComments).end <= node.start) { node.leadingComments = lastChild.leadingComments; delete lastChild.leadingComments; } else { for (i = lastChild.leadingComments.length - 2; i >= 0; --i) { if (lastChild.leadingComments[i].end <= node.start) { node.leadingComments = lastChild.leadingComments.splice(0, i + 1); break; } } } } } else if (this.state.leadingComments.length > 0) { if (last(this.state.leadingComments).end <= node.start) { if (this.state.commentPreviousNode) { for (j = 0; j < this.state.leadingComments.length; j++) { if (this.state.leadingComments[j].end < this.state.commentPreviousNode.end) { this.state.leadingComments.splice(j, 1); j--; } } } if (this.state.leadingComments.length > 0) { node.leadingComments = this.state.leadingComments; this.state.leadingComments = []; } } else { for (i = 0; i < this.state.leadingComments.length; i++) { if (this.state.leadingComments[i].end > node.start) { break; } } const leadingComments = this.state.leadingComments.slice(0, i); if (leadingComments.length) { node.leadingComments = leadingComments; } trailingComments = this.state.leadingComments.slice(i); if (trailingComments.length === 0) { trailingComments = null; } } } this.state.commentPreviousNode = node; if (trailingComments) { if (trailingComments.length && trailingComments[0].start >= node.start && last(trailingComments).end <= node.end) { node.innerComments = trailingComments; } else { const firstTrailingCommentIndex = trailingComments.findIndex(comment => comment.end >= node.end); if (firstTrailingCommentIndex > 0) { node.innerComments = trailingComments.slice(0, firstTrailingCommentIndex); node.trailingComments = trailingComments.slice(firstTrailingCommentIndex); } else { node.trailingComments = trailingComments; } } } stack.push(node); } } const ErrorMessages = Object.freeze({ AccessorIsGenerator: "A %0ter cannot be a generator", ArgumentsInClass: "'arguments' is only allowed in functions and class methods", AsyncFunctionInSingleStatementContext: "Async functions can only be declared at the top level or inside a block", AwaitBindingIdentifier: "Can not use 'await' as identifier inside an async function", AwaitBindingIdentifierInStaticBlock: "Can not use 'await' as identifier inside a static block", AwaitExpressionFormalParameter: "await is not allowed in async function parameters", AwaitNotInAsyncContext: "'await' is only allowed within async functions and at the top levels of modules", AwaitNotInAsyncFunction: "'await' is only allowed within async functions", BadGetterArity: "getter must not have any formal parameters", BadSetterArity: "setter must have exactly one formal parameter", BadSetterRestParameter: "setter function argument must not be a rest parameter", ConstructorClassField: "Classes may not have a field named 'constructor'", ConstructorClassPrivateField: "Classes may not have a private field named '#constructor'", ConstructorIsAccessor: "Class constructor may not be an accessor", ConstructorIsAsync: "Constructor can't be an async function", ConstructorIsGenerator: "Constructor can't be a generator", DeclarationMissingInitializer: "%0 require an initialization value", DecoratorBeforeExport: "Decorators must be placed *before* the 'export' keyword. You can set the 'decoratorsBeforeExport' option to false to use the 'export @decorator class {}' syntax", DecoratorConstructor: "Decorators can't be used with a constructor. Did you mean '@dec class { ... }'?", DecoratorExportClass: "Using the export keyword between a decorator and a class is not allowed. Please use `export @dec class` instead.", DecoratorSemicolon: "Decorators must not be followed by a semicolon", DecoratorStaticBlock: "Decorators can't be used with a static block", DeletePrivateField: "Deleting a private field is not allowed", DestructureNamedImport: "ES2015 named imports do not destructure. Use another statement for destructuring after the import.", DuplicateConstructor: "Duplicate constructor in the same class", DuplicateDefaultExport: "Only one default export allowed per module.", DuplicateExport: "`%0` has already been exported. Exported identifiers must be unique.", DuplicateProto: "Redefinition of __proto__ property", DuplicateRegExpFlags: "Duplicate regular expression flag", DuplicateStaticBlock: "Duplicate static block in the same class", ElementAfterRest: "Rest element must be last element", EscapedCharNotAnIdentifier: "Invalid Unicode escape", ExportBindingIsString: "A string literal cannot be used as an exported binding without `from`.\n- Did you mean `export { '%0' as '%1' } from 'some-module'`?", ExportDefaultFromAsIdentifier: "'from' is not allowed as an identifier after 'export default'", ForInOfLoopInitializer: "%0 loop variable declaration may not have an initializer", GeneratorInSingleStatementContext: "Generators can only be declared at the top level or inside a block", IllegalBreakContinue: "Unsyntactic %0", IllegalLanguageModeDirective: "Illegal 'use strict' directive in function with non-simple parameter list", IllegalReturn: "'return' outside of function", ImportBindingIsString: 'A string literal cannot be used as an imported binding.\n- Did you mean `import { "%0" as foo }`?', ImportCallArgumentTrailingComma: "Trailing comma is disallowed inside import(...) arguments", ImportCallArity: "import() requires exactly %0", ImportCallNotNewExpression: "Cannot use new with import(...)", ImportCallSpreadArgument: "... is not allowed in import()", ImportMetaOutsideModule: `import.meta may appear only with 'sourceType: "module"'`, ImportOutsideModule: `'import' and 'export' may appear only with 'sourceType: "module"'`, InvalidBigIntLiteral: "Invalid BigIntLiteral", InvalidCodePoint: "Code point out of bounds", InvalidDecimal: "Invalid decimal", InvalidDigit: "Expected number in radix %0", InvalidEscapeSequence: "Bad character escape sequence", InvalidEscapeSequenceTemplate: "Invalid escape sequence in template", InvalidEscapedReservedWord: "Escape sequence in keyword %0", InvalidIdentifier: "Invalid identifier %0", InvalidLhs: "Invalid left-hand side in %0", InvalidLhsBinding: "Binding invalid left-hand side in %0", InvalidNumber: "Invalid number", InvalidOrMissingExponent: "Floating-point numbers require a valid exponent after the 'e'", InvalidOrUnexpectedToken: "Unexpected character '%0'", InvalidParenthesizedAssignment: "Invalid parenthesized assignment pattern", InvalidPrivateFieldResolution: "Private name #%0 is not defined", InvalidPropertyBindingPattern: "Binding member expression", InvalidRecordProperty: "Only properties and spread elements are allowed in record definitions", InvalidRestAssignmentPattern: "Invalid rest operator's argument", LabelRedeclaration: "Label '%0' is already declared", LetInLexicalBinding: "'let' is not allowed to be used as a name in 'let' or 'const' declarations.", LineTerminatorBeforeArrow: "No line break is allowed before '=>'", MalformedRegExpFlags: "Invalid regular expression flag", MissingClassName: "A class name is required", MissingEqInAssignment: "Only '=' operator can be used for specifying default value.", MissingSemicolon: "Missing semicolon", MissingUnicodeEscape: "Expecting Unicode escape sequence \\uXXXX", MixingCoalesceWithLogical: "Nullish coalescing operator(??) requires parens when mixing with logical operators", ModuleAttributeDifferentFromType: "The only accepted module attribute is `type`", ModuleAttributeInvalidValue: "Only string literals are allowed as module attribute values", ModuleAttributesWithDuplicateKeys: 'Duplicate key "%0" is not allowed in module attributes', ModuleExportNameHasLoneSurrogate: "An export name cannot include a lone surrogate, found '\\u%0'", ModuleExportUndefined: "Export '%0' is not defined", MultipleDefaultsInSwitch: "Multiple default clauses", NewlineAfterThrow: "Illegal newline after throw", NoCatchOrFinally: "Missing catch or finally clause", NumberIdentifier: "Identifier directly after number", NumericSeparatorInEscapeSequence: "Numeric separators are not allowed inside unicode escape sequences or hex escape sequences", ObsoleteAwaitStar: "await* has been removed from the async functions proposal. Use Promise.all() instead.", OptionalChainingNoNew: "constructors in/after an Optional Chain are not allowed", OptionalChainingNoTemplate: "Tagged Template Literals are not allowed in optionalChain", ParamDupe: "Argument name clash", PatternHasAccessor: "Object pattern can't contain getter or setter", PatternHasMethod: "Object pattern can't contain methods", PipelineBodyNoArrow: 'Unexpected arrow "=>" after pipeline body; arrow function in pipeline body must be parenthesized', PipelineBodySequenceExpression: "Pipeline body may not be a comma-separated sequence expression", PipelineHeadSequenceExpression: "Pipeline head should not be a comma-separated sequence expression", PipelineTopicUnused: "Pipeline is in topic style but does not use topic reference", PrimaryTopicNotAllowed: "Topic reference was used in a lexical context without topic binding", PrimaryTopicRequiresSmartPipeline: "Primary Topic Reference found but pipelineOperator not passed 'smart' for 'proposal' option.", PrivateInExpectedIn: "Private names are only allowed in property accesses (`obj.#%0`) or in `in` expressions (`#%0 in obj`)", PrivateNameRedeclaration: "Duplicate private name #%0", RecordExpressionBarIncorrectEndSyntaxType: "Record expressions ending with '|}' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'", RecordExpressionBarIncorrectStartSyntaxType: "Record expressions starting with '{|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'", RecordExpressionHashIncorrectStartSyntaxType: "Record expressions starting with '#{' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'", RecordNoProto: "'__proto__' is not allowed in Record expressions", RestTrailingComma: "Unexpected trailing comma after rest element", SloppyFunction: "In non-strict mode code, functions can only be declared at top level, inside a block, or as the body of an if statement", StaticPrototype: "Classes may not have static property named prototype", StrictDelete: "Deleting local variable in strict mode", StrictEvalArguments: "Assigning to '%0' in strict mode", StrictEvalArgumentsBinding: "Binding '%0' in strict mode", StrictFunction: "In strict mode code, functions can only be declared at top level or inside a block", StrictNumericEscape: "The only valid numeric escape in strict mode is '\\0'", StrictOctalLiteral: "Legacy octal literals are not allowed in strict mode", StrictWith: "'with' in strict mode", SuperNotAllowed: "super() is only valid inside a class constructor of a subclass. Maybe a typo in the method name ('constructor') or not extending another class?", SuperPrivateField: "Private fields can't be accessed on super", TrailingDecorator: "Decorators must be attached to a class element", TupleExpressionBarIncorrectEndSyntaxType: "Tuple expressions ending with '|]' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'", TupleExpressionBarIncorrectStartSyntaxType: "Tuple expressions starting with '[|' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'bar'", TupleExpressionHashIncorrectStartSyntaxType: "Tuple expressions starting with '#[' are only allowed when the 'syntaxType' option of the 'recordAndTuple' plugin is set to 'hash'", UnexpectedArgumentPlaceholder: "Unexpected argument placeholder", UnexpectedAwaitAfterPipelineBody: 'Unexpected "await" after pipeline body; await must have parentheses in minimal proposal', UnexpectedDigitAfterHash: "Unexpected digit after hash token", UnexpectedImportExport: "'import' and 'export' may only appear at the top level", UnexpectedKeyword: "Unexpected keyword '%0'", UnexpectedLeadingDecorator: "Leading decorators must be attached to a class declaration", UnexpectedLexicalDeclaration: "Lexical declaration cannot appear in a single-statement context", UnexpectedNewTarget: "new.target can only be used in functions", UnexpectedNumericSeparator: "A numeric separator is only allowed between two digits", UnexpectedPrivateField: "Private names can only be used as the name of a class element (i.e. class C { #p = 42; #m() {} } )\n or a property of member expression (i.e. this.#p).", UnexpectedReservedWord: "Unexpected reserved word '%0'", UnexpectedSuper: "super is only allowed in object methods and classes", UnexpectedToken: "Unexpected token '%0'", UnexpectedTokenUnaryExponentiation: "Illegal expression. Wrap left hand side or entire exponentiation in parentheses.", UnsupportedBind: "Binding should be performed on object property.", UnsupportedDecoratorExport: "A decorated export must export a class declaration", UnsupportedDefaultExport: "Only expressions, functions or classes are allowed as the `default` export.", UnsupportedImport: "import can only be used in import() or import.meta", UnsupportedMetaProperty: "The only valid meta property for %0 is %0.%1", UnsupportedParameterDecorator: "Decorators cannot be used to decorate parameters", UnsupportedPropertyDecorator: "Decorators cannot be used to decorate object literal properties", UnsupportedSuper: "super can only be used with function calls (i.e. super()) or in property accesses (i.e. super.prop or super[prop])", UnterminatedComment: "Unterminated comment", UnterminatedRegExp: "Unterminated regular expression", UnterminatedString: "Unterminated string constant", UnterminatedTemplate: "Unterminated template", VarRedeclaration: "Identifier '%0' has already been declared", YieldBindingIdentifier: "Can not use 'yield' as identifier inside a generator", YieldInParameter: "Yield expression is not allowed in formal parameters", ZeroDigitNumericSeparator: "Numeric separator can not be used after leading 0" }); class ParserError extends CommentsParser { getLocationForPosition(pos) { let loc; if (pos === this.state.start) loc = this.state.startLoc;else if (pos === this.state.lastTokStart) loc = this.state.lastTokStartLoc;else if (pos === this.state.end) loc = this.state.endLoc;else if (pos === this.state.lastTokEnd) loc = this.state.lastTokEndLoc;else loc = getLineInfo(this.input, pos); return loc; } raise(pos, errorTemplate, ...params) { return this.raiseWithData(pos, undefined, errorTemplate, ...params); } raiseOverwrite(pos, errorTemplate, ...params) { const loc = this.getLocationForPosition(pos); const message = errorTemplate.replace(/%(\d+)/g, (_, i) => params[i]) + ` (${loc.line}:${loc.column})`; if (this.options.errorRecovery) { const errors = this.state.errors; for (let i = errors.length - 1; i >= 0; i--) { const error = errors[i]; if (error.pos === pos) { return Object.assign(error, { message }); } else if (error.pos < pos) { break; } } } return this._raise({ loc, pos }, message); } raiseWithData(pos, data, errorTemplate, ...params) { const loc = this.getLocationForPosition(pos); const message = errorTemplate.replace(/%(\d+)/g, (_, i) => params[i]) + ` (${loc.line}:${loc.column})`; return this._raise(Object.assign({ loc, pos }, data), message); } _raise(errorContext, message) { const err = new SyntaxError(message); Object.assign(err, errorContext); if (this.options.errorRecovery) { if (!this.isLookahead) this.state.errors.push(err); return err; } else { throw err; } } } var estree = (superClass => class extends superClass { estreeParseRegExpLiteral({ pattern, flags }) { let regex = null; try { regex = new RegExp(pattern, flags); } catch (e) {} const node = this.estreeParseLiteral(regex); node.regex = { pattern, flags }; return node; } estreeParseBigIntLiteral(value) { let bigInt; try { bigInt = BigInt(value); } catch (_unused) { bigInt = null; } const node = this.estreeParseLiteral(bigInt); node.bigint = String(node.value || value); return node; } estreeParseDecimalLiteral(value) { const decimal = null; const node = this.estreeParseLiteral(decimal); node.decimal = String(node.value || value); return node; } estreeParseLiteral(value) { return this.parseLiteral(value, "Literal"); } directiveToStmt(directive) { const directiveLiteral = directive.value; const stmt = this.startNodeAt(directive.start, directive.loc.start); const expression = this.startNodeAt(directiveLiteral.start, directiveLiteral.loc.start); expression.value = directiveLiteral.extra.expressionValue; expression.raw = directiveLiteral.extra.raw; stmt.expression = this.finishNodeAt(expression, "Literal", directiveLiteral.end, directiveLiteral.loc.end); stmt.directive = directiveLiteral.extra.raw.slice(1, -1); return this.finishNodeAt(stmt, "ExpressionStatement", directive.end, directive.loc.end); } initFunction(node, isAsync) { super.initFunction(node, isAsync); node.expression = false; } checkDeclaration(node) { if (node != null && this.isObjectProperty(node)) { this.checkDeclaration(node.value); } else { super.checkDeclaration(node); } } getObjectOrClassMethodParams(method) { return method.value.params; } isValidDirective(stmt) { var _stmt$expression$extr; return stmt.type === "ExpressionStatement" && stmt.expression.type === "Literal" && typeof stmt.expression.value === "string" && !((_stmt$expression$extr = stmt.expression.extra) != null && _stmt$expression$extr.parenthesized); } stmtToDirective(stmt) { const directive = super.stmtToDirective(stmt); const value = stmt.expression.value; this.addExtra(directive.value, "expressionValue", value); return directive; } parseBlockBody(node, ...args) { super.parseBlockBody(node, ...args); const directiveStatements = node.directives.map(d => this.directiveToStmt(d)); node.body = directiveStatements.concat(node.body); delete node.directives; } pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) { this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true); if (method.typeParameters) { method.value.typeParameters = method.typeParameters; delete method.typeParameters; } classBody.body.push(method); } parseExprAtom(refExpressionErrors) { switch (this.state.type) { case types.num: case types.string: return this.estreeParseLiteral(this.state.value); case types.regexp: return this.estreeParseRegExpLiteral(this.state.value); case types.bigint: return this.estreeParseBigIntLiteral(this.state.value); case types.decimal: return this.estreeParseDecimalLiteral(this.state.value); case types._null: return this.estreeParseLiteral(null); case types._true: return this.estreeParseLiteral(true); case types._false: return this.estreeParseLiteral(false); default: return super.parseExprAtom(refExpressionErrors); } } parseMaybePrivateName(...args) { const node = super.parseMaybePrivateName(...args); if (node.type === "PrivateName" && this.getPluginOption("estree", "classFeatures")) { return this.convertPrivateNameToPrivateIdentifier(node); } return node; } convertPrivateNameToPrivateIdentifier(node) { const name = super.getPrivateNameSV(node); node = node; delete node.id; node.name = name; node.type = "PrivateIdentifier"; return node; } isPrivateName(node) { if (!this.getPluginOption("estree", "classFeatures")) { return super.isPrivateName(node); } return node.type === "PrivateIdentifier"; } getPrivateNameSV(node) { if (!this.getPluginOption("estree", "classFeatures")) { return super.getPrivateNameSV(node); } return node.name; } parseLiteral(value, type, startPos, startLoc) { const node = super.parseLiteral(value, type, startPos, startLoc); node.raw = node.extra.raw; delete node.extra; return node; } parseFunctionBody(node, allowExpression, isMethod = false) { super.parseFunctionBody(node, allowExpression, isMethod); node.expression = node.body.type !== "BlockStatement"; } parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) { let funcNode = this.startNode(); funcNode.kind = node.kind; funcNode = super.parseMethod(funcNode, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope); funcNode.type = "FunctionExpression"; delete funcNode.kind; node.value = funcNode; if (type === "ClassPrivateMethod") { node.computed = false; } type = "MethodDefinition"; return this.finishNode(node, type); } parseClassProperty(...args) { const propertyNode = super.parseClassProperty(...args); if (this.getPluginOption("estree", "classFeatures")) { propertyNode.type = "PropertyDefinition"; } return propertyNode; } parseClassPrivateProperty(...args) { const propertyNode = super.parseClassPrivateProperty(...args); if (this.getPluginOption("estree", "classFeatures")) { propertyNode.type = "PropertyDefinition"; propertyNode.computed = false; } return propertyNode; } parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) { const node = super.parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor); if (node) { node.type = "Property"; if (node.kind === "method") node.kind = "init"; node.shorthand = false; } return node; } parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors) { const node = super.parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors); if (node) { node.kind = "init"; node.type = "Property"; } return node; } toAssignable(node, isLHS = false) { if (node != null && this.isObjectProperty(node)) { this.toAssignable(node.value, isLHS); return node; } return super.toAssignable(node, isLHS); } toAssignableObjectExpressionProp(prop, ...args) { if (prop.kind === "get" || prop.kind === "set") { this.raise(prop.key.start, ErrorMessages.PatternHasAccessor); } else if (prop.method) { this.raise(prop.key.start, ErrorMessages.PatternHasMethod); } else { super.toAssignableObjectExpressionProp(prop, ...args); } } finishCallExpression(node, optional) { super.finishCallExpression(node, optional); if (node.callee.type === "Import") { node.type = "ImportExpression"; node.source = node.arguments[0]; delete node.arguments; delete node.callee; } return node; } toReferencedArguments(node) { if (node.type === "ImportExpression") { return; } super.toReferencedArguments(node); } parseExport(node) { super.parseExport(node); switch (node.type) { case "ExportAllDeclaration": node.exported = null; break; case "ExportNamedDeclaration": if (node.specifiers.length === 1 && node.specifiers[0].type === "ExportNamespaceSpecifier") { node.type = "ExportAllDeclaration"; node.exported = node.specifiers[0].exported; delete node.specifiers; } break; } return node; } parseSubscript(base, startPos, startLoc, noCalls, state) { const node = super.parseSubscript(base, startPos, startLoc, noCalls, state); if (state.optionalChainMember) { if (node.type === "OptionalMemberExpression" || node.type === "OptionalCallExpression") { node.type = node.type.substring(8); } if (state.stop) { const chain = this.startNodeAtNode(node); chain.expression = node; return this.finishNode(chain, "ChainExpression"); } } else if (node.type === "MemberExpression" || node.type === "CallExpression") { node.optional = false; } return node; } hasPropertyAsPrivateName(node) { if (node.type === "ChainExpression") { node = node.expression; } return super.hasPropertyAsPrivateName(node); } isOptionalChain(node) { return node.type === "ChainExpression"; } isObjectProperty(node) { return node.type === "Property" && node.kind === "init" && !node.method; } isObjectMethod(node) { return node.method || node.kind === "get" || node.kind === "set"; } }); class TokContext { constructor(token, isExpr, preserveSpace, override) { this.token = void 0; this.isExpr = void 0; this.preserveSpace = void 0; this.override = void 0; this.token = token; this.isExpr = !!isExpr; this.preserveSpace = !!preserveSpace; this.override = override; } } const types$1 = { braceStatement: new TokContext("{", false), braceExpression: new TokContext("{", true), recordExpression: new TokContext("#{", true), templateQuasi: new TokContext("${", false), parenStatement: new TokContext("(", false), parenExpression: new TokContext("(", true), template: new TokContext("`", true, true, p => p.readTmplToken()), functionExpression: new TokContext("function", true), functionStatement: new TokContext("function", false) }; types.parenR.updateContext = types.braceR.updateContext = function () { if (this.state.context.length === 1) { this.state.exprAllowed = true; return; } let out = this.state.context.pop(); if (out === types$1.braceStatement && this.curContext().token === "function") { out = this.state.context.pop(); } this.state.exprAllowed = !out.isExpr; }; types.name.updateContext = function (prevType) { let allowed = false; if (prevType !== types.dot) { if (this.state.value === "of" && !this.state.exprAllowed && prevType !== types._function && prevType !== types._class) { allowed = true; } } this.state.exprAllowed = allowed; if (this.state.isIterator) { this.state.isIterator = false; } }; types.braceL.updateContext = function (prevType) { this.state.context.push(this.braceIsBlock(prevType) ? types$1.braceStatement : types$1.braceExpression); this.state.exprAllowed = true; }; types.dollarBraceL.updateContext = function () { this.state.context.push(types$1.templateQuasi); this.state.exprAllowed = true; }; types.parenL.updateContext = function (prevType) { const statementParens = prevType === types._if || prevType === types._for || prevType === types._with || prevType === types._while; this.state.context.push(statementParens ? types$1.parenStatement : types$1.parenExpression); this.state.exprAllowed = true; }; types.incDec.updateContext = function () {}; types._function.updateContext = types._class.updateContext = function (prevType) { if (prevType.beforeExpr && prevType !== types.semi && prevType !== types._else && !(prevType === types._return && this.hasPrecedingLineBreak()) && !((prevType === types.colon || prevType === types.braceL) && this.curContext() === types$1.b_stat)) { this.state.context.push(types$1.functionExpression); } else { this.state.context.push(types$1.functionStatement); } this.state.exprAllowed = false; }; types.backQuote.updateContext = function () { if (this.curContext() === types$1.template) { this.state.context.pop(); } else { this.state.context.push(types$1.template); } this.state.exprAllowed = false; }; types.braceHashL.updateContext = function () { this.state.context.push(types$1.recordExpression); this.state.exprAllowed = true; }; let nonASCIIidentifierStartChars = "\xaa\xb5\xba\xc0-\xd6\xd8-\xf6\xf8-\u02c1\u02c6-\u02d1\u02e0-\u02e4\u02ec\u02ee\u0370-\u0374\u0376\u0377\u037a-\u037d\u037f\u0386\u0388-\u038a\u038c\u038e-\u03a1\u03a3-\u03f5\u03f7-\u0481\u048a-\u052f\u0531-\u0556\u0559\u0560-\u0588\u05d0-\u05ea\u05ef-\u05f2\u0620-\u064a\u066e\u066f\u0671-\u06d3\u06d5\u06e5\u06e6\u06ee\u06ef\u06fa-\u06fc\u06ff\u0710\u0712-\u072f\u074d-\u07a5\u07b1\u07ca-\u07ea\u07f4\u07f5\u07fa\u0800-\u0815\u081a\u0824\u0828\u0840-\u0858\u0860-\u086a\u08a0-\u08b4\u08b6-\u08c7\u0904-\u0939\u093d\u0950\u0958-\u0961\u0971-\u0980\u0985-\u098c\u098f\u0990\u0993-\u09a8\u09aa-\u09b0\u09b2\u09b6-\u09b9\u09bd\u09ce\u09dc\u09dd\u09df-\u09e1\u09f0\u09f1\u09fc\u0a05-\u0a0a\u0a0f\u0a10\u0a13-\u0a28\u0a2a-\u0a30\u0a32\u0a33\u0a35\u0a36\u0a38\u0a39\u0a59-\u0a5c\u0a5e\u0a72-\u0a74\u0a85-\u0a8d\u0a8f-\u0a91\u0a93-\u0aa8\u0aaa-\u0ab0\u0ab2\u0ab3\u0ab5-\u0ab9\u0abd\u0ad0\u0ae0\u0ae1\u0af9\u0b05-\u0b0c\u0b0f\u0b10\u0b13-\u0b28\u0b2a-\u0b30\u0b32\u0b33\u0b35-\u0b39\u0b3d\u0b5c\u0b5d\u0b5f-\u0b61\u0b71\u0b83\u0b85-\u0b8a\u0b8e-\u0b90\u0b92-\u0b95\u0b99\u0b9a\u0b9c\u0b9e\u0b9f\u0ba3\u0ba4\u0ba8-\u0baa\u0bae-\u0bb9\u0bd0\u0c05-\u0c0c\u0c0e-\u0c10\u0c12-\u0c28\u0c2a-\u0c39\u0c3d\u0c58-\u0c5a\u0c60\u0c61\u0c80\u0c85-\u0c8c\u0c8e-\u0c90\u0c92-\u0ca8\u0caa-\u0cb3\u0cb5-\u0cb9\u0cbd\u0cde\u0ce0\u0ce1\u0cf1\u0cf2\u0d04-\u0d0c\u0d0e-\u0d10\u0d12-\u0d3a\u0d3d\u0d4e\u0d54-\u0d56\u0d5f-\u0d61\u0d7a-\u0d7f\u0d85-\u0d96\u0d9a-\u0db1\u0db3-\u0dbb\u0dbd\u0dc0-\u0dc6\u0e01-\u0e30\u0e32\u0e33\u0e40-\u0e46\u0e81\u0e82\u0e84\u0e86-\u0e8a\u0e8c-\u0ea3\u0ea5\u0ea7-\u0eb0\u0eb2\u0eb3\u0ebd\u0ec0-\u0ec4\u0ec6\u0edc-\u0edf\u0f00\u0f40-\u0f47\u0f49-\u0f6c\u0f88-\u0f8c\u1000-\u102a\u103f\u1050-\u1055\u105a-\u105d\u1061\u1065\u1066\u106e-\u1070\u1075-\u1081\u108e\u10a0-\u10c5\u10c7\u10cd\u10d0-\u10fa\u10fc-\u1248\u124a-\u124d\u1250-\u1256\u1258\u125a-\u125d\u1260-\u1288\u128a-\u128d\u1290-\u12b0\u12b2-\u12b5\u12b8-\u12be\u12c0\u12c2-\u12c5\u12c8-\u12d6\u12d8-\u1310\u1312-\u1315\u1318-\u135a\u1380-\u138f\u13a0-\u13f5\u13f8-\u13fd\u1401-\u166c\u166f-\u167f\u1681-\u169a\u16a0-\u16ea\u16ee-\u16f8\u1700-\u170c\u170e-\u1711\u1720-\u1731\u1740-\u1751\u1760-\u176c\u176e-\u1770\u1780-\u17b3\u17d7\u17dc\u1820-\u1878\u1880-\u18a8\u18aa\u18b0-\u18f5\u1900-\u191e\u1950-\u196d\u1970-\u1974\u1980-\u19ab\u19b0-\u19c9\u1a00-\u1a16\u1a20-\u1a54\u1aa7\u1b05-\u1b33\u1b45-\u1b4b\u1b83-\u1ba0\u1bae\u1baf\u1bba-\u1be5\u1c00-\u1c23\u1c4d-\u1c4f\u1c5a-\u1c7d\u1c80-\u1c88\u1c90-\u1cba\u1cbd-\u1cbf\u1ce9-\u1cec\u1cee-\u1cf3\u1cf5\u1cf6\u1cfa\u1d00-\u1dbf\u1e00-\u1f15\u1f18-\u1f1d\u1f20-\u1f45\u1f48-\u1f4d\u1f50-\u1f57\u1f59\u1f5b\u1f5d\u1f5f-\u1f7d\u1f80-\u1fb4\u1fb6-\u1fbc\u1fbe\u1fc2-\u1fc4\u1fc6-\u1fcc\u1fd0-\u1fd3\u1fd6-\u1fdb\u1fe0-\u1fec\u1ff2-\u1ff4\u1ff6-\u1ffc\u2071\u207f\u2090-\u209c\u2102\u2107\u210a-\u2113\u2115\u2118-\u211d\u2124\u2126\u2128\u212a-\u2139\u213c-\u213f\u2145-\u2149\u214e\u2160-\u2188\u2c00-\u2c2e\u2c30-\u2c5e\u2c60-\u2ce4\u2ceb-\u2cee\u2cf2\u2cf3\u2d00-\u2d25\u2d27\u2d2d\u2d30-\u2d67\u2d6f\u2d80-\u2d96\u2da0-\u2da6\u2da8-\u2dae\u2db0-\u2db6\u2db8-\u2dbe\u2dc0-\u2dc6\u2dc8-\u2dce\u2dd0-\u2dd6\u2dd8-\u2dde\u3005-\u3007\u3021-\u3029\u3031-\u3035\u3038-\u303c\u3041-\u3096\u309b-\u309f\u30a1-\u30fa\u30fc-\u30ff\u3105-\u312f\u3131-\u318e\u31a0-\u31bf\u31f0-\u31ff\u3400-\u4dbf\u4e00-\u9ffc\ua000-\ua48c\ua4d0-\ua4fd\ua500-\ua60c\ua610-\ua61f\ua62a\ua62b\ua640-\ua66e\ua67f-\ua69d\ua6a0-\ua6ef\ua717-\ua71f\ua722-\ua788\ua78b-\ua7bf\ua7c2-\ua7ca\ua7f5-\ua801\ua803-\ua805\ua807-\ua80a\ua80c-\ua822\ua840-\ua873\ua882-\ua8b3\ua8f2-\ua8f7\ua8fb\ua8fd\ua8fe\ua90a-\ua925\ua930-\ua946\ua960-\ua97c\ua984-\ua9b2\ua9cf\ua9e0-\ua9e4\ua9e6-\ua9ef\ua9fa-\ua9fe\uaa00-\uaa28\uaa40-\uaa42\uaa44-\uaa4b\uaa60-\uaa76\uaa7a\uaa7e-\uaaaf\uaab1\uaab5\uaab6\uaab9-\uaabd\uaac0\uaac2\uaadb-\uaadd\uaae0-\uaaea\uaaf2-\uaaf4\uab01-\uab06\uab09-\uab0e\uab11-\uab16\uab20-\uab26\uab28-\uab2e\uab30-\uab5a\uab5c-\uab69\uab70-\uabe2\uac00-\ud7a3\ud7b0-\ud7c6\ud7cb-\ud7fb\uf900-\ufa6d\ufa70-\ufad9\ufb00-\ufb06\ufb13-\ufb17\ufb1d\ufb1f-\ufb28\ufb2a-\ufb36\ufb38-\ufb3c\ufb3e\ufb40\ufb41\ufb43\ufb44\ufb46-\ufbb1\ufbd3-\ufd3d\ufd50-\ufd8f\ufd92-\ufdc7\ufdf0-\ufdfb\ufe70-\ufe74\ufe76-\ufefc\uff21-\uff3a\uff41-\uff5a\uff66-\uffbe\uffc2-\uffc7\uffca-\uffcf\uffd2-\uffd7\uffda-\uffdc"; let nonASCIIidentifierChars = "\u200c\u200d\xb7\u0300-\u036f\u0387\u0483-\u0487\u0591-\u05bd\u05bf\u05c1\u05c2\u05c4\u05c5\u05c7\u0610-\u061a\u064b-\u0669\u0670\u06d6-\u06dc\u06df-\u06e4\u06e7\u06e8\u06ea-\u06ed\u06f0-\u06f9\u0711\u0730-\u074a\u07a6-\u07b0\u07c0-\u07c9\u07eb-\u07f3\u07fd\u0816-\u0819\u081b-\u0823\u0825-\u0827\u0829-\u082d\u0859-\u085b\u08d3-\u08e1\u08e3-\u0903\u093a-\u093c\u093e-\u094f\u0951-\u0957\u0962\u0963\u0966-\u096f\u0981-\u0983\u09bc\u09be-\u09c4\u09c7\u09c8\u09cb-\u09cd\u09d7\u09e2\u09e3\u09e6-\u09ef\u09fe\u0a01-\u0a03\u0a3c\u0a3e-\u0a42\u0a47\u0a48\u0a4b-\u0a4d\u0a51\u0a66-\u0a71\u0a75\u0a81-\u0a83\u0abc\u0abe-\u0ac5\u0ac7-\u0ac9\u0acb-\u0acd\u0ae2\u0ae3\u0ae6-\u0aef\u0afa-\u0aff\u0b01-\u0b03\u0b3c\u0b3e-\u0b44\u0b47\u0b48\u0b4b-\u0b4d\u0b55-\u0b57\u0b62\u0b63\u0b66-\u0b6f\u0b82\u0bbe-\u0bc2\u0bc6-\u0bc8\u0bca-\u0bcd\u0bd7\u0be6-\u0bef\u0c00-\u0c04\u0c3e-\u0c44\u0c46-\u0c48\u0c4a-\u0c4d\u0c55\u0c56\u0c62\u0c63\u0c66-\u0c6f\u0c81-\u0c83\u0cbc\u0cbe-\u0cc4\u0cc6-\u0cc8\u0cca-\u0ccd\u0cd5\u0cd6\u0ce2\u0ce3\u0ce6-\u0cef\u0d00-\u0d03\u0d3b\u0d3c\u0d3e-\u0d44\u0d46-\u0d48\u0d4a-\u0d4d\u0d57\u0d62\u0d63\u0d66-\u0d6f\u0d81-\u0d83\u0dca\u0dcf-\u0dd4\u0dd6\u0dd8-\u0ddf\u0de6-\u0def\u0df2\u0df3\u0e31\u0e34-\u0e3a\u0e47-\u0e4e\u0e50-\u0e59\u0eb1\u0eb4-\u0ebc\u0ec8-\u0ecd\u0ed0-\u0ed9\u0f18\u0f19\u0f20-\u0f29\u0f35\u0f37\u0f39\u0f3e\u0f3f\u0f71-\u0f84\u0f86\u0f87\u0f8d-\u0f97\u0f99-\u0fbc\u0fc6\u102b-\u103e\u1040-\u1049\u1056-\u1059\u105e-\u1060\u1062-\u1064\u1067-\u106d\u1071-\u1074\u1082-\u108d\u108f-\u109d\u135d-\u135f\u1369-\u1371\u1712-\u1714\u1732-\u1734\u1752\u1753\u1772\u1773\u17b4-\u17d3\u17dd\u17e0-\u17e9\u180b-\u180d\u1810-\u1819\u18a9\u1920-\u192b\u1930-\u193b\u1946-\u194f\u19d0-\u19da\u1a17-\u1a1b\u1a55-\u1a5e\u1a60-\u1a7c\u1a7f-\u1a89\u1a90-\u1a99\u1ab0-\u1abd\u1abf\u1ac0\u1b00-\u1b04\u1b34-\u1b44\u1b50-\u1b59\u1b6b-\u1b73\u1b80-\u1b82\u1ba1-\u1bad\u1bb0-\u1bb9\u1be6-\u1bf3\u1c24-\u1c37\u1c40-\u1c49\u1c50-\u1c59\u1cd0-\u1cd2\u1cd4-\u1ce8\u1ced\u1cf4\u1cf7-\u1cf9\u1dc0-\u1df9\u1dfb-\u1dff\u203f\u2040\u2054\u20d0-\u20dc\u20e1\u20e5-\u20f0\u2cef-\u2cf1\u2d7f\u2de0-\u2dff\u302a-\u302f\u3099\u309a\ua620-\ua629\ua66f\ua674-\ua67d\ua69e\ua69f\ua6f0\ua6f1\ua802\ua806\ua80b\ua823-\ua827\ua82c\ua880\ua881\ua8b4-\ua8c5\ua8d0-\ua8d9\ua8e0-\ua8f1\ua8ff-\ua909\ua926-\ua92d\ua947-\ua953\ua980-\ua983\ua9b3-\ua9c0\ua9d0-\ua9d9\ua9e5\ua9f0-\ua9f9\uaa29-\uaa36\uaa43\uaa4c\uaa4d\uaa50-\uaa59\uaa7b-\uaa7d\uaab0\uaab2-\uaab4\uaab7\uaab8\uaabe\uaabf\uaac1\uaaeb-\uaaef\uaaf5\uaaf6\uabe3-\uabea\uabec\uabed\uabf0-\uabf9\ufb1e\ufe00-\ufe0f\ufe20-\ufe2f\ufe33\ufe34\ufe4d-\ufe4f\uff10-\uff19\uff3f"; const nonASCIIidentifierStart = new RegExp("[" + nonASCIIidentifierStartChars + "]"); const nonASCIIidentifier = new RegExp("[" + nonASCIIidentifierStartChars + nonASCIIidentifierChars + "]"); nonASCIIidentifierStartChars = nonASCIIidentifierChars = null; const astralIdentifierStartCodes = [0, 11, 2, 25, 2, 18, 2, 1, 2, 14, 3, 13, 35, 122, 70, 52, 268, 28, 4, 48, 48, 31, 14, 29, 6, 37, 11, 29, 3, 35, 5, 7, 2, 4, 43, 157, 19, 35, 5, 35, 5, 39, 9, 51, 157, 310, 10, 21, 11, 7, 153, 5, 3, 0, 2, 43, 2, 1, 4, 0, 3, 22, 11, 22, 10, 30, 66, 18, 2, 1, 11, 21, 11, 25, 71, 55, 7, 1, 65, 0, 16, 3, 2, 2, 2, 28, 43, 28, 4, 28, 36, 7, 2, 27, 28, 53, 11, 21, 11, 18, 14, 17, 111, 72, 56, 50, 14, 50, 14, 35, 349, 41, 7, 1, 79, 28, 11, 0, 9, 21, 107, 20, 28, 22, 13, 52, 76, 44, 33, 24, 27, 35, 30, 0, 3, 0, 9, 34, 4, 0, 13, 47, 15, 3, 22, 0, 2, 0, 36, 17, 2, 24, 85, 6, 2, 0, 2, 3, 2, 14, 2, 9, 8, 46, 39, 7, 3, 1, 3, 21, 2, 6, 2, 1, 2, 4, 4, 0, 19, 0, 13, 4, 159, 52, 19, 3, 21, 2, 31, 47, 21, 1, 2, 0, 185, 46, 42, 3, 37, 47, 21, 0, 60, 42, 14, 0, 72, 26, 230, 43, 117, 63, 32, 7, 3, 0, 3, 7, 2, 1, 2, 23, 16, 0, 2, 0, 95, 7, 3, 38, 17, 0, 2, 0, 29, 0, 11, 39, 8, 0, 22, 0, 12, 45, 20, 0, 35, 56, 264, 8, 2, 36, 18, 0, 50, 29, 113, 6, 2, 1, 2, 37, 22, 0, 26, 5, 2, 1, 2, 31, 15, 0, 328, 18, 190, 0, 80, 921, 103, 110, 18, 195, 2749, 1070, 4050, 582, 8634, 568, 8, 30, 114, 29, 19, 47, 17, 3, 32, 20, 6, 18, 689, 63, 129, 74, 6, 0, 67, 12, 65, 1, 2, 0, 29, 6135, 9, 1237, 43, 8, 8952, 286, 50, 2, 18, 3, 9, 395, 2309, 106, 6, 12, 4, 8, 8, 9, 5991, 84, 2, 70, 2, 1, 3, 0, 3, 1, 3, 3, 2, 11, 2, 0, 2, 6, 2, 64, 2, 3, 3, 7, 2, 6, 2, 27, 2, 3, 2, 4, 2, 0, 4, 6, 2, 339, 3, 24, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 30, 2, 24, 2, 7, 2357, 44, 11, 6, 17, 0, 370, 43, 1301, 196, 60, 67, 8, 0, 1205, 3, 2, 26, 2, 1, 2, 0, 3, 0, 2, 9, 2, 3, 2, 0, 2, 0, 7, 0, 5, 0, 2, 0, 2, 0, 2, 2, 2, 1, 2, 0, 3, 0, 2, 0, 2, 0, 2, 0, 2, 0, 2, 1, 2, 0, 3, 3, 2, 6, 2, 3, 2, 3, 2, 0, 2, 9, 2, 16, 6, 2, 2, 4, 2, 16, 4421, 42717, 35, 4148, 12, 221, 3, 5761, 15, 7472, 3104, 541, 1507, 4938]; const astralIdentifierCodes = [509, 0, 227, 0, 150, 4, 294, 9, 1368, 2, 2, 1, 6, 3, 41, 2, 5, 0, 166, 1, 574, 3, 9, 9, 370, 1, 154, 10, 176, 2, 54, 14, 32, 9, 16, 3, 46, 10, 54, 9, 7, 2, 37, 13, 2, 9, 6, 1, 45, 0, 13, 2, 49, 13, 9, 3, 2, 11, 83, 11, 7, 0, 161, 11, 6, 9, 7, 3, 56, 1, 2, 6, 3, 1, 3, 2, 10, 0, 11, 1, 3, 6, 4, 4, 193, 17, 10, 9, 5, 0, 82, 19, 13, 9, 214, 6, 3, 8, 28, 1, 83, 16, 16, 9, 82, 12, 9, 9, 84, 14, 5, 9, 243, 14, 166, 9, 71, 5, 2, 1, 3, 3, 2, 0, 2, 1, 13, 9, 120, 6, 3, 6, 4, 0, 29, 9, 41, 6, 2, 3, 9, 0, 10, 10, 47, 15, 406, 7, 2, 7, 17, 9, 57, 21, 2, 13, 123, 5, 4, 0, 2, 1, 2, 6, 2, 0, 9, 9, 49, 4, 2, 1, 2, 4, 9, 9, 330, 3, 19306, 9, 135, 4, 60, 6, 26, 9, 1014, 0, 2, 54, 8, 3, 82, 0, 12, 1, 19628, 1, 5319, 4, 4, 5, 9, 7, 3, 6, 31, 3, 149, 2, 1418, 49, 513, 54, 5, 49, 9, 0, 15, 0, 23, 4, 2, 14, 1361, 6, 2, 16, 3, 6, 2, 1, 2, 4, 262, 6, 10, 9, 419, 13, 1495, 6, 110, 6, 6, 9, 4759, 9, 787719, 239]; function isInAstralSet(code, set) { let pos = 0x10000; for (let i = 0, length = set.length; i < length; i += 2) { pos += set[i]; if (pos > code) return false; pos += set[i + 1]; if (pos >= code) return true; } return false; } function isIdentifierStart(code) { if (code < 65) return code === 36; if (code <= 90) return true; if (code < 97) return code === 95; if (code <= 122) return true; if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifierStart.test(String.fromCharCode(code)); } return isInAstralSet(code, astralIdentifierStartCodes); } function isIdentifierChar(code) { if (code < 48) return code === 36; if (code < 58) return true; if (code < 65) return false; if (code <= 90) return true; if (code < 97) return code === 95; if (code <= 122) return true; if (code <= 0xffff) { return code >= 0xaa && nonASCIIidentifier.test(String.fromCharCode(code)); } return isInAstralSet(code, astralIdentifierStartCodes) || isInAstralSet(code, astralIdentifierCodes); } const reservedWords = { keyword: ["break", "case", "catch", "continue", "debugger", "default", "do", "else", "finally", "for", "function", "if", "return", "switch", "throw", "try", "var", "const", "while", "with", "new", "this", "super", "class", "extends", "export", "import", "null", "true", "false", "in", "instanceof", "typeof", "void", "delete"], strict: ["implements", "interface", "let", "package", "private", "protected", "public", "static", "yield"], strictBind: ["eval", "arguments"] }; const keywords$1 = new Set(reservedWords.keyword); const reservedWordsStrictSet = new Set(reservedWords.strict); const reservedWordsStrictBindSet = new Set(reservedWords.strictBind); function isReservedWord(word, inModule) { return inModule && word === "await" || word === "enum"; } function isStrictReservedWord(word, inModule) { return isReservedWord(word, inModule) || reservedWordsStrictSet.has(word); } function isStrictBindOnlyReservedWord(word) { return reservedWordsStrictBindSet.has(word); } function isStrictBindReservedWord(word, inModule) { return isStrictReservedWord(word, inModule) || isStrictBindOnlyReservedWord(word); } function isKeyword(word) { return keywords$1.has(word); } const keywordRelationalOperator = /^in(stanceof)?$/; function isIteratorStart(current, next) { return current === 64 && next === 64; } const SCOPE_OTHER = 0b000000000, SCOPE_PROGRAM = 0b000000001, SCOPE_FUNCTION = 0b000000010, SCOPE_ARROW = 0b000000100, SCOPE_SIMPLE_CATCH = 0b000001000, SCOPE_SUPER = 0b000010000, SCOPE_DIRECT_SUPER = 0b000100000, SCOPE_CLASS = 0b001000000, SCOPE_STATIC_BLOCK = 0b010000000, SCOPE_TS_MODULE = 0b100000000, SCOPE_VAR = SCOPE_PROGRAM | SCOPE_FUNCTION | SCOPE_TS_MODULE; const BIND_KIND_VALUE = 0b000000000001, BIND_KIND_TYPE = 0b000000000010, BIND_SCOPE_VAR = 0b000000000100, BIND_SCOPE_LEXICAL = 0b000000001000, BIND_SCOPE_FUNCTION = 0b000000010000, BIND_FLAGS_NONE = 0b000001000000, BIND_FLAGS_CLASS = 0b000010000000, BIND_FLAGS_TS_ENUM = 0b000100000000, BIND_FLAGS_TS_CONST_ENUM = 0b001000000000, BIND_FLAGS_TS_EXPORT_ONLY = 0b010000000000, BIND_FLAGS_FLOW_DECLARE_FN = 0b100000000000; const BIND_CLASS = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_CLASS, BIND_LEXICAL = BIND_KIND_VALUE | 0 | BIND_SCOPE_LEXICAL | 0, BIND_VAR = BIND_KIND_VALUE | 0 | BIND_SCOPE_VAR | 0, BIND_FUNCTION = BIND_KIND_VALUE | 0 | BIND_SCOPE_FUNCTION | 0, BIND_TS_INTERFACE = 0 | BIND_KIND_TYPE | 0 | BIND_FLAGS_CLASS, BIND_TS_TYPE = 0 | BIND_KIND_TYPE | 0 | 0, BIND_TS_ENUM = BIND_KIND_VALUE | BIND_KIND_TYPE | BIND_SCOPE_LEXICAL | BIND_FLAGS_TS_ENUM, BIND_TS_AMBIENT = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY, BIND_NONE = 0 | 0 | 0 | BIND_FLAGS_NONE, BIND_OUTSIDE = BIND_KIND_VALUE | 0 | 0 | BIND_FLAGS_NONE, BIND_TS_CONST_ENUM = BIND_TS_ENUM | BIND_FLAGS_TS_CONST_ENUM, BIND_TS_NAMESPACE = 0 | 0 | 0 | BIND_FLAGS_TS_EXPORT_ONLY, BIND_FLOW_DECLARE_FN = BIND_FLAGS_FLOW_DECLARE_FN; const CLASS_ELEMENT_FLAG_STATIC = 0b100, CLASS_ELEMENT_KIND_GETTER = 0b010, CLASS_ELEMENT_KIND_SETTER = 0b001, CLASS_ELEMENT_KIND_ACCESSOR = CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_KIND_SETTER; const CLASS_ELEMENT_STATIC_GETTER = CLASS_ELEMENT_KIND_GETTER | CLASS_ELEMENT_FLAG_STATIC, CLASS_ELEMENT_STATIC_SETTER = CLASS_ELEMENT_KIND_SETTER | CLASS_ELEMENT_FLAG_STATIC, CLASS_ELEMENT_INSTANCE_GETTER = CLASS_ELEMENT_KIND_GETTER, CLASS_ELEMENT_INSTANCE_SETTER = CLASS_ELEMENT_KIND_SETTER, CLASS_ELEMENT_OTHER = 0; class Scope { constructor(flags) { this.flags = void 0; this.var = []; this.lexical = []; this.functions = []; this.flags = flags; } } class ScopeHandler { constructor(raise, inModule) { this.scopeStack = []; this.undefinedExports = new Map(); this.undefinedPrivateNames = new Map(); this.raise = raise; this.inModule = inModule; } get inFunction() { return (this.currentVarScope().flags & SCOPE_FUNCTION) > 0; } get allowSuper() { return (this.currentThisScope().flags & SCOPE_SUPER) > 0; } get allowDirectSuper() { return (this.currentThisScope().flags & SCOPE_DIRECT_SUPER) > 0; } get inClass() { return (this.currentThisScope().flags & SCOPE_CLASS) > 0; } get inStaticBlock() { return (this.currentThisScope().flags & SCOPE_STATIC_BLOCK) > 0; } get inNonArrowFunction() { return (this.currentThisScope().flags & SCOPE_FUNCTION) > 0; } get treatFunctionsAsVar() { return this.treatFunctionsAsVarInScope(this.currentScope()); } createScope(flags) { return new Scope(flags); } enter(flags) { this.scopeStack.push(this.createScope(flags)); } exit() { this.scopeStack.pop(); } treatFunctionsAsVarInScope(scope) { return !!(scope.flags & SCOPE_FUNCTION || !this.inModule && scope.flags & SCOPE_PROGRAM); } declareName(name, bindingType, pos) { let scope = this.currentScope(); if (bindingType & BIND_SCOPE_LEXICAL || bindingType & BIND_SCOPE_FUNCTION) { this.checkRedeclarationInScope(scope, name, bindingType, pos); if (bindingType & BIND_SCOPE_FUNCTION) { scope.functions.push(name); } else { scope.lexical.push(name); } if (bindingType & BIND_SCOPE_LEXICAL) { this.maybeExportDefined(scope, name); } } else if (bindingType & BIND_SCOPE_VAR) { for (let i = this.scopeStack.length - 1; i >= 0; --i) { scope = this.scopeStack[i]; this.checkRedeclarationInScope(scope, name, bindingType, pos); scope.var.push(name); this.maybeExportDefined(scope, name); if (scope.flags & SCOPE_VAR) break; } } if (this.inModule && scope.flags & SCOPE_PROGRAM) { this.undefinedExports.delete(name); } } maybeExportDefined(scope, name) { if (this.inModule && scope.flags & SCOPE_PROGRAM) { this.undefinedExports.delete(name); } } checkRedeclarationInScope(scope, name, bindingType, pos) { if (this.isRedeclaredInScope(scope, name, bindingType)) { this.raise(pos, ErrorMessages.VarRedeclaration, name); } } isRedeclaredInScope(scope, name, bindingType) { if (!(bindingType & BIND_KIND_VALUE)) return false; if (bindingType & BIND_SCOPE_LEXICAL) { return scope.lexical.indexOf(name) > -1 || scope.functions.indexOf(name) > -1 || scope.var.indexOf(name) > -1; } if (bindingType & BIND_SCOPE_FUNCTION) { return scope.lexical.indexOf(name) > -1 || !this.treatFunctionsAsVarInScope(scope) && scope.var.indexOf(name) > -1; } return scope.lexical.indexOf(name) > -1 && !(scope.flags & SCOPE_SIMPLE_CATCH && scope.lexical[0] === name) || !this.treatFunctionsAsVarInScope(scope) && scope.functions.indexOf(name) > -1; } checkLocalExport(id) { if (this.scopeStack[0].lexical.indexOf(id.name) === -1 && this.scopeStack[0].var.indexOf(id.name) === -1 && this.scopeStack[0].functions.indexOf(id.name) === -1) { this.undefinedExports.set(id.name, id.start); } } currentScope() { return this.scopeStack[this.scopeStack.length - 1]; } currentVarScope() { for (let i = this.scopeStack.length - 1;; i--) { const scope = this.scopeStack[i]; if (scope.flags & SCOPE_VAR) { return scope; } } } currentThisScope() { for (let i = this.scopeStack.length - 1;; i--) { const scope = this.scopeStack[i]; if ((scope.flags & SCOPE_VAR || scope.flags & SCOPE_CLASS) && !(scope.flags & SCOPE_ARROW)) { return scope; } } } } class FlowScope extends Scope { constructor(...args) { super(...args); this.declareFunctions = []; } } class FlowScopeHandler extends ScopeHandler { createScope(flags) { return new FlowScope(flags); } declareName(name, bindingType, pos) { const scope = this.currentScope(); if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) { this.checkRedeclarationInScope(scope, name, bindingType, pos); this.maybeExportDefined(scope, name); scope.declareFunctions.push(name); return; } super.declareName(...arguments); } isRedeclaredInScope(scope, name, bindingType) { if (super.isRedeclaredInScope(...arguments)) return true; if (bindingType & BIND_FLAGS_FLOW_DECLARE_FN) { return !scope.declareFunctions.includes(name) && (scope.lexical.includes(name) || scope.functions.includes(name)); } return false; } checkLocalExport(id) { if (this.scopeStack[0].declareFunctions.indexOf(id.name) === -1) { super.checkLocalExport(id); } } } const reservedTypes = new Set(["_", "any", "bool", "boolean", "empty", "extends", "false", "interface", "mixed", "null", "number", "static", "string", "true", "typeof", "void"]); const FlowErrors = Object.freeze({ AmbiguousConditionalArrow: "Ambiguous expression: wrap the arrow functions in parentheses to disambiguate.", AmbiguousDeclareModuleKind: "Found both `declare module.exports` and `declare export` in the same module. Modules can only have 1 since they are either an ES module or they are a CommonJS module", AssignReservedType: "Cannot overwrite reserved type %0", DeclareClassElement: "The `declare` modifier can only appear on class fields.", DeclareClassFieldInitializer: "Initializers are not allowed in fields with the `declare` modifier.", DuplicateDeclareModuleExports: "Duplicate `declare module.exports` statement", EnumBooleanMemberNotInitialized: "Boolean enum members need to be initialized. Use either `%0 = true,` or `%0 = false,` in enum `%1`.", EnumDuplicateMemberName: "Enum member names need to be unique, but the name `%0` has already been used before in enum `%1`.", EnumInconsistentMemberValues: "Enum `%0` has inconsistent member initializers. Either use no initializers, or consistently use literals (either booleans, numbers, or strings) for all member initializers.", EnumInvalidExplicitType: "Enum type `%1` is not valid. Use one of `boolean`, `number`, `string`, or `symbol` in enum `%0`.", EnumInvalidExplicitTypeUnknownSupplied: "Supplied enum type is not valid. Use one of `boolean`, `number`, `string`, or `symbol` in enum `%0`.", EnumInvalidMemberInitializerPrimaryType: "Enum `%0` has type `%2`, so the initializer of `%1` needs to be a %2 literal.", EnumInvalidMemberInitializerSymbolType: "Symbol enum members cannot be initialized. Use `%1,` in enum `%0`.", EnumInvalidMemberInitializerUnknownType: "The enum member initializer for `%1` needs to be a literal (either a boolean, number, or string) in enum `%0`.", EnumInvalidMemberName: "Enum member names cannot start with lowercase 'a' through 'z'. Instead of using `%0`, consider using `%1`, in enum `%2`.", EnumNumberMemberNotInitialized: "Number enum members need to be initialized, e.g. `%1 = 1` in enum `%0`.", EnumStringMemberInconsistentlyInitailized: "String enum members need to consistently either all use initializers, or use no initializers, in enum `%0`.", GetterMayNotHaveThisParam: "A getter cannot have a `this` parameter.", ImportTypeShorthandOnlyInPureImport: "The `type` and `typeof` keywords on named imports can only be used on regular `import` statements. It cannot be used with `import type` or `import typeof` statements", InexactInsideExact: "Explicit inexact syntax cannot appear inside an explicit exact object type", InexactInsideNonObject: "Explicit inexact syntax cannot appear in class or interface definitions", InexactVariance: "Explicit inexact syntax cannot have variance", InvalidNonTypeImportInDeclareModule: "Imports within a `declare module` body must always be `import type` or `import typeof`", MissingTypeParamDefault: "Type parameter declaration needs a default, since a preceding type parameter declaration has a default.", NestedDeclareModule: "`declare module` cannot be used inside another `declare module`", NestedFlowComment: "Cannot have a flow comment inside another flow comment", OptionalBindingPattern: "A binding pattern parameter cannot be optional in an implementation signature.", SetterMayNotHaveThisParam: "A setter cannot have a `this` parameter.", SpreadVariance: "Spread properties cannot have variance", ThisParamAnnotationRequired: "A type annotation is required for the `this` parameter.", ThisParamBannedInConstructor: "Constructors cannot have a `this` parameter; constructors don't bind `this` like other functions.", ThisParamMayNotBeOptional: "The `this` parameter cannot be optional.", ThisParamMustBeFirst: "The `this` parameter must be the first function parameter.", ThisParamNoDefault: "The `this` parameter may not have a default value.", TypeBeforeInitializer: "Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`", TypeCastInPattern: "The type cast expression is expected to be wrapped with parenthesis", UnexpectedExplicitInexactInObject: "Explicit inexact syntax must appear at the end of an inexact object", UnexpectedReservedType: "Unexpected reserved type %0", UnexpectedReservedUnderscore: "`_` is only allowed as a type argument to call or new", UnexpectedSpaceBetweenModuloChecks: "Spaces between `%` and `checks` are not allowed here.", UnexpectedSpreadType: "Spread operator cannot appear in class or interface definitions", UnexpectedSubtractionOperand: 'Unexpected token, expected "number" or "bigint"', UnexpectedTokenAfterTypeParameter: "Expected an arrow function after this type parameter declaration", UnexpectedTypeParameterBeforeAsyncArrowFunction: "Type parameters must come after the async keyword, e.g. instead of ` async () => {}`, use `async () => {}`", UnsupportedDeclareExportKind: "`declare export %0` is not supported. Use `%1` instead", UnsupportedStatementInDeclareModule: "Only declares and type imports are allowed inside declare module", UnterminatedFlowComment: "Unterminated flow-comment" }); function isEsModuleType(bodyElement) { return bodyElement.type === "DeclareExportAllDeclaration" || bodyElement.type === "DeclareExportDeclaration" && (!bodyElement.declaration || bodyElement.declaration.type !== "TypeAlias" && bodyElement.declaration.type !== "InterfaceDeclaration"); } function hasTypeImportKind(node) { return node.importKind === "type" || node.importKind === "typeof"; } function isMaybeDefaultImport(state) { return (state.type === types.name || !!state.type.keyword) && state.value !== "from"; } const exportSuggestions = { const: "declare export var", let: "declare export var", type: "export type", interface: "export interface" }; function partition(list, test) { const list1 = []; const list2 = []; for (let i = 0; i < list.length; i++) { (test(list[i], i, list) ? list1 : list2).push(list[i]); } return [list1, list2]; } const FLOW_PRAGMA_REGEX = /\*?\s*@((?:no)?flow)\b/; var flow = (superClass => { var _temp; return _temp = class extends superClass { constructor(...args) { super(...args); this.flowPragma = undefined; } getScopeHandler() { return FlowScopeHandler; } shouldParseTypes() { return this.getPluginOption("flow", "all") || this.flowPragma === "flow"; } shouldParseEnums() { return !!this.getPluginOption("flow", "enums"); } finishToken(type, val) { if (type !== types.string && type !== types.semi && type !== types.interpreterDirective) { if (this.flowPragma === undefined) { this.flowPragma = null; } } return super.finishToken(type, val); } addComment(comment) { if (this.flowPragma === undefined) { const matches = FLOW_PRAGMA_REGEX.exec(comment.value); if (!matches) ; else if (matches[1] === "flow") { this.flowPragma = "flow"; } else if (matches[1] === "noflow") { this.flowPragma = "noflow"; } else { throw new Error("Unexpected flow pragma"); } } return super.addComment(comment); } flowParseTypeInitialiser(tok) { const oldInType = this.state.inType; this.state.inType = true; this.expect(tok || types.colon); const type = this.flowParseType(); this.state.inType = oldInType; return type; } flowParsePredicate() { const node = this.startNode(); const moduloLoc = this.state.startLoc; const moduloPos = this.state.start; this.expect(types.modulo); const checksLoc = this.state.startLoc; this.expectContextual("checks"); if (moduloLoc.line !== checksLoc.line || moduloLoc.column !== checksLoc.column - 1) { this.raise(moduloPos, FlowErrors.UnexpectedSpaceBetweenModuloChecks); } if (this.eat(types.parenL)) { node.value = this.parseExpression(); this.expect(types.parenR); return this.finishNode(node, "DeclaredPredicate"); } else { return this.finishNode(node, "InferredPredicate"); } } flowParseTypeAndPredicateInitialiser() { const oldInType = this.state.inType; this.state.inType = true; this.expect(types.colon); let type = null; let predicate = null; if (this.match(types.modulo)) { this.state.inType = oldInType; predicate = this.flowParsePredicate(); } else { type = this.flowParseType(); this.state.inType = oldInType; if (this.match(types.modulo)) { predicate = this.flowParsePredicate(); } } return [type, predicate]; } flowParseDeclareClass(node) { this.next(); this.flowParseInterfaceish(node, true); return this.finishNode(node, "DeclareClass"); } flowParseDeclareFunction(node) { this.next(); const id = node.id = this.parseIdentifier(); const typeNode = this.startNode(); const typeContainer = this.startNode(); if (this.isRelational("<")) { typeNode.typeParameters = this.flowParseTypeParameterDeclaration(); } else { typeNode.typeParameters = null; } this.expect(types.parenL); const tmp = this.flowParseFunctionTypeParams(); typeNode.params = tmp.params; typeNode.rest = tmp.rest; typeNode.this = tmp._this; this.expect(types.parenR); [typeNode.returnType, node.predicate] = this.flowParseTypeAndPredicateInitialiser(); typeContainer.typeAnnotation = this.finishNode(typeNode, "FunctionTypeAnnotation"); id.typeAnnotation = this.finishNode(typeContainer, "TypeAnnotation"); this.resetEndLocation(id); this.semicolon(); this.scope.declareName(node.id.name, BIND_FLOW_DECLARE_FN, node.id.start); return this.finishNode(node, "DeclareFunction"); } flowParseDeclare(node, insideModule) { if (this.match(types._class)) { return this.flowParseDeclareClass(node); } else if (this.match(types._function)) { return this.flowParseDeclareFunction(node); } else if (this.match(types._var)) { return this.flowParseDeclareVariable(node); } else if (this.eatContextual("module")) { if (this.match(types.dot)) { return this.flowParseDeclareModuleExports(node); } else { if (insideModule) { this.raise(this.state.lastTokStart, FlowErrors.NestedDeclareModule); } return this.flowParseDeclareModule(node); } } else if (this.isContextual("type")) { return this.flowParseDeclareTypeAlias(node); } else if (this.isContextual("opaque")) { return this.flowParseDeclareOpaqueType(node); } else if (this.isContextual("interface")) { return this.flowParseDeclareInterface(node); } else if (this.match(types._export)) { return this.flowParseDeclareExportDeclaration(node, insideModule); } else { throw this.unexpected(); } } flowParseDeclareVariable(node) { this.next(); node.id = this.flowParseTypeAnnotatableIdentifier(true); this.scope.declareName(node.id.name, BIND_VAR, node.id.start); this.semicolon(); return this.finishNode(node, "DeclareVariable"); } flowParseDeclareModule(node) { this.scope.enter(SCOPE_OTHER); if (this.match(types.string)) { node.id = this.parseExprAtom(); } else { node.id = this.parseIdentifier(); } const bodyNode = node.body = this.startNode(); const body = bodyNode.body = []; this.expect(types.braceL); while (!this.match(types.braceR)) { let bodyNode = this.startNode(); if (this.match(types._import)) { this.next(); if (!this.isContextual("type") && !this.match(types._typeof)) { this.raise(this.state.lastTokStart, FlowErrors.InvalidNonTypeImportInDeclareModule); } this.parseImport(bodyNode); } else { this.expectContextual("declare", FlowErrors.UnsupportedStatementInDeclareModule); bodyNode = this.flowParseDeclare(bodyNode, true); } body.push(bodyNode); } this.scope.exit(); this.expect(types.braceR); this.finishNode(bodyNode, "BlockStatement"); let kind = null; let hasModuleExport = false; body.forEach(bodyElement => { if (isEsModuleType(bodyElement)) { if (kind === "CommonJS") { this.raise(bodyElement.start, FlowErrors.AmbiguousDeclareModuleKind); } kind = "ES"; } else if (bodyElement.type === "DeclareModuleExports") { if (hasModuleExport) { this.raise(bodyElement.start, FlowErrors.DuplicateDeclareModuleExports); } if (kind === "ES") { this.raise(bodyElement.start, FlowErrors.AmbiguousDeclareModuleKind); } kind = "CommonJS"; hasModuleExport = true; } }); node.kind = kind || "CommonJS"; return this.finishNode(node, "DeclareModule"); } flowParseDeclareExportDeclaration(node, insideModule) { this.expect(types._export); if (this.eat(types._default)) { if (this.match(types._function) || this.match(types._class)) { node.declaration = this.flowParseDeclare(this.startNode()); } else { node.declaration = this.flowParseType(); this.semicolon(); } node.default = true; return this.finishNode(node, "DeclareExportDeclaration"); } else { if (this.match(types._const) || this.isLet() || (this.isContextual("type") || this.isContextual("interface")) && !insideModule) { const label = this.state.value; const suggestion = exportSuggestions[label]; throw this.raise(this.state.start, FlowErrors.UnsupportedDeclareExportKind, label, suggestion); } if (this.match(types._var) || this.match(types._function) || this.match(types._class) || this.isContextual("opaque")) { node.declaration = this.flowParseDeclare(this.startNode()); node.default = false; return this.finishNode(node, "DeclareExportDeclaration"); } else if (this.match(types.star) || this.match(types.braceL) || this.isContextual("interface") || this.isContextual("type") || this.isContextual("opaque")) { node = this.parseExport(node); if (node.type === "ExportNamedDeclaration") { node.type = "ExportDeclaration"; node.default = false; delete node.exportKind; } node.type = "Declare" + node.type; return node; } } throw this.unexpected(); } flowParseDeclareModuleExports(node) { this.next(); this.expectContextual("exports"); node.typeAnnotation = this.flowParseTypeAnnotation(); this.semicolon(); return this.finishNode(node, "DeclareModuleExports"); } flowParseDeclareTypeAlias(node) { this.next(); this.flowParseTypeAlias(node); node.type = "DeclareTypeAlias"; return node; } flowParseDeclareOpaqueType(node) { this.next(); this.flowParseOpaqueType(node, true); node.type = "DeclareOpaqueType"; return node; } flowParseDeclareInterface(node) { this.next(); this.flowParseInterfaceish(node); return this.finishNode(node, "DeclareInterface"); } flowParseInterfaceish(node, isClass = false) { node.id = this.flowParseRestrictedIdentifier(!isClass, true); this.scope.declareName(node.id.name, isClass ? BIND_FUNCTION : BIND_LEXICAL, node.id.start); if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterDeclaration(); } else { node.typeParameters = null; } node.extends = []; node.implements = []; node.mixins = []; if (this.eat(types._extends)) { do { node.extends.push(this.flowParseInterfaceExtends()); } while (!isClass && this.eat(types.comma)); } if (this.isContextual("mixins")) { this.next(); do { node.mixins.push(this.flowParseInterfaceExtends()); } while (this.eat(types.comma)); } if (this.isContextual("implements")) { this.next(); do { node.implements.push(this.flowParseInterfaceExtends()); } while (this.eat(types.comma)); } node.body = this.flowParseObjectType({ allowStatic: isClass, allowExact: false, allowSpread: false, allowProto: isClass, allowInexact: false }); } flowParseInterfaceExtends() { const node = this.startNode(); node.id = this.flowParseQualifiedTypeIdentifier(); if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterInstantiation(); } else { node.typeParameters = null; } return this.finishNode(node, "InterfaceExtends"); } flowParseInterface(node) { this.flowParseInterfaceish(node); return this.finishNode(node, "InterfaceDeclaration"); } checkNotUnderscore(word) { if (word === "_") { this.raise(this.state.start, FlowErrors.UnexpectedReservedUnderscore); } } checkReservedType(word, startLoc, declaration) { if (!reservedTypes.has(word)) return; this.raise(startLoc, declaration ? FlowErrors.AssignReservedType : FlowErrors.UnexpectedReservedType, word); } flowParseRestrictedIdentifier(liberal, declaration) { this.checkReservedType(this.state.value, this.state.start, declaration); return this.parseIdentifier(liberal); } flowParseTypeAlias(node) { node.id = this.flowParseRestrictedIdentifier(false, true); this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start); if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterDeclaration(); } else { node.typeParameters = null; } node.right = this.flowParseTypeInitialiser(types.eq); this.semicolon(); return this.finishNode(node, "TypeAlias"); } flowParseOpaqueType(node, declare) { this.expectContextual("type"); node.id = this.flowParseRestrictedIdentifier(true, true); this.scope.declareName(node.id.name, BIND_LEXICAL, node.id.start); if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterDeclaration(); } else { node.typeParameters = null; } node.supertype = null; if (this.match(types.colon)) { node.supertype = this.flowParseTypeInitialiser(types.colon); } node.impltype = null; if (!declare) { node.impltype = this.flowParseTypeInitialiser(types.eq); } this.semicolon(); return this.finishNode(node, "OpaqueType"); } flowParseTypeParameter(requireDefault = false) { const nodeStart = this.state.start; const node = this.startNode(); const variance = this.flowParseVariance(); const ident = this.flowParseTypeAnnotatableIdentifier(); node.name = ident.name; node.variance = variance; node.bound = ident.typeAnnotation; if (this.match(types.eq)) { this.eat(types.eq); node.default = this.flowParseType(); } else { if (requireDefault) { this.raise(nodeStart, FlowErrors.MissingTypeParamDefault); } } return this.finishNode(node, "TypeParameter"); } flowParseTypeParameterDeclaration() { const oldInType = this.state.inType; const node = this.startNode(); node.params = []; this.state.inType = true; if (this.isRelational("<") || this.match(types.jsxTagStart)) { this.next(); } else { this.unexpected(); } let defaultRequired = false; do { const typeParameter = this.flowParseTypeParameter(defaultRequired); node.params.push(typeParameter); if (typeParameter.default) { defaultRequired = true; } if (!this.isRelational(">")) { this.expect(types.comma); } } while (!this.isRelational(">")); this.expectRelational(">"); this.state.inType = oldInType; return this.finishNode(node, "TypeParameterDeclaration"); } flowParseTypeParameterInstantiation() { const node = this.startNode(); const oldInType = this.state.inType; node.params = []; this.state.inType = true; this.expectRelational("<"); const oldNoAnonFunctionType = this.state.noAnonFunctionType; this.state.noAnonFunctionType = false; while (!this.isRelational(">")) { node.params.push(this.flowParseType()); if (!this.isRelational(">")) { this.expect(types.comma); } } this.state.noAnonFunctionType = oldNoAnonFunctionType; this.expectRelational(">"); this.state.inType = oldInType; return this.finishNode(node, "TypeParameterInstantiation"); } flowParseTypeParameterInstantiationCallOrNew() { const node = this.startNode(); const oldInType = this.state.inType; node.params = []; this.state.inType = true; this.expectRelational("<"); while (!this.isRelational(">")) { node.params.push(this.flowParseTypeOrImplicitInstantiation()); if (!this.isRelational(">")) { this.expect(types.comma); } } this.expectRelational(">"); this.state.inType = oldInType; return this.finishNode(node, "TypeParameterInstantiation"); } flowParseInterfaceType() { const node = this.startNode(); this.expectContextual("interface"); node.extends = []; if (this.eat(types._extends)) { do { node.extends.push(this.flowParseInterfaceExtends()); } while (this.eat(types.comma)); } node.body = this.flowParseObjectType({ allowStatic: false, allowExact: false, allowSpread: false, allowProto: false, allowInexact: false }); return this.finishNode(node, "InterfaceTypeAnnotation"); } flowParseObjectPropertyKey() { return this.match(types.num) || this.match(types.string) ? this.parseExprAtom() : this.parseIdentifier(true); } flowParseObjectTypeIndexer(node, isStatic, variance) { node.static = isStatic; if (this.lookahead().type === types.colon) { node.id = this.flowParseObjectPropertyKey(); node.key = this.flowParseTypeInitialiser(); } else { node.id = null; node.key = this.flowParseType(); } this.expect(types.bracketR); node.value = this.flowParseTypeInitialiser(); node.variance = variance; return this.finishNode(node, "ObjectTypeIndexer"); } flowParseObjectTypeInternalSlot(node, isStatic) { node.static = isStatic; node.id = this.flowParseObjectPropertyKey(); this.expect(types.bracketR); this.expect(types.bracketR); if (this.isRelational("<") || this.match(types.parenL)) { node.method = true; node.optional = false; node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start)); } else { node.method = false; if (this.eat(types.question)) { node.optional = true; } node.value = this.flowParseTypeInitialiser(); } return this.finishNode(node, "ObjectTypeInternalSlot"); } flowParseObjectTypeMethodish(node) { node.params = []; node.rest = null; node.typeParameters = null; node.this = null; if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterDeclaration(); } this.expect(types.parenL); if (this.match(types._this)) { node.this = this.flowParseFunctionTypeParam(true); node.this.name = null; if (!this.match(types.parenR)) { this.expect(types.comma); } } while (!this.match(types.parenR) && !this.match(types.ellipsis)) { node.params.push(this.flowParseFunctionTypeParam(false)); if (!this.match(types.parenR)) { this.expect(types.comma); } } if (this.eat(types.ellipsis)) { node.rest = this.flowParseFunctionTypeParam(false); } this.expect(types.parenR); node.returnType = this.flowParseTypeInitialiser(); return this.finishNode(node, "FunctionTypeAnnotation"); } flowParseObjectTypeCallProperty(node, isStatic) { const valueNode = this.startNode(); node.static = isStatic; node.value = this.flowParseObjectTypeMethodish(valueNode); return this.finishNode(node, "ObjectTypeCallProperty"); } flowParseObjectType({ allowStatic, allowExact, allowSpread, allowProto, allowInexact }) { const oldInType = this.state.inType; this.state.inType = true; const nodeStart = this.startNode(); nodeStart.callProperties = []; nodeStart.properties = []; nodeStart.indexers = []; nodeStart.internalSlots = []; let endDelim; let exact; let inexact = false; if (allowExact && this.match(types.braceBarL)) { this.expect(types.braceBarL); endDelim = types.braceBarR; exact = true; } else { this.expect(types.braceL); endDelim = types.braceR; exact = false; } nodeStart.exact = exact; while (!this.match(endDelim)) { let isStatic = false; let protoStart = null; let inexactStart = null; const node = this.startNode(); if (allowProto && this.isContextual("proto")) { const lookahead = this.lookahead(); if (lookahead.type !== types.colon && lookahead.type !== types.question) { this.next(); protoStart = this.state.start; allowStatic = false; } } if (allowStatic && this.isContextual("static")) { const lookahead = this.lookahead(); if (lookahead.type !== types.colon && lookahead.type !== types.question) { this.next(); isStatic = true; } } const variance = this.flowParseVariance(); if (this.eat(types.bracketL)) { if (protoStart != null) { this.unexpected(protoStart); } if (this.eat(types.bracketL)) { if (variance) { this.unexpected(variance.start); } nodeStart.internalSlots.push(this.flowParseObjectTypeInternalSlot(node, isStatic)); } else { nodeStart.indexers.push(this.flowParseObjectTypeIndexer(node, isStatic, variance)); } } else if (this.match(types.parenL) || this.isRelational("<")) { if (protoStart != null) { this.unexpected(protoStart); } if (variance) { this.unexpected(variance.start); } nodeStart.callProperties.push(this.flowParseObjectTypeCallProperty(node, isStatic)); } else { let kind = "init"; if (this.isContextual("get") || this.isContextual("set")) { const lookahead = this.lookahead(); if (lookahead.type === types.name || lookahead.type === types.string || lookahead.type === types.num) { kind = this.state.value; this.next(); } } const propOrInexact = this.flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact != null ? allowInexact : !exact); if (propOrInexact === null) { inexact = true; inexactStart = this.state.lastTokStart; } else { nodeStart.properties.push(propOrInexact); } } this.flowObjectTypeSemicolon(); if (inexactStart && !this.match(types.braceR) && !this.match(types.braceBarR)) { this.raise(inexactStart, FlowErrors.UnexpectedExplicitInexactInObject); } } this.expect(endDelim); if (allowSpread) { nodeStart.inexact = inexact; } const out = this.finishNode(nodeStart, "ObjectTypeAnnotation"); this.state.inType = oldInType; return out; } flowParseObjectTypeProperty(node, isStatic, protoStart, variance, kind, allowSpread, allowInexact) { if (this.eat(types.ellipsis)) { const isInexactToken = this.match(types.comma) || this.match(types.semi) || this.match(types.braceR) || this.match(types.braceBarR); if (isInexactToken) { if (!allowSpread) { this.raise(this.state.lastTokStart, FlowErrors.InexactInsideNonObject); } else if (!allowInexact) { this.raise(this.state.lastTokStart, FlowErrors.InexactInsideExact); } if (variance) { this.raise(variance.start, FlowErrors.InexactVariance); } return null; } if (!allowSpread) { this.raise(this.state.lastTokStart, FlowErrors.UnexpectedSpreadType); } if (protoStart != null) { this.unexpected(protoStart); } if (variance) { this.raise(variance.start, FlowErrors.SpreadVariance); } node.argument = this.flowParseType(); return this.finishNode(node, "ObjectTypeSpreadProperty"); } else { node.key = this.flowParseObjectPropertyKey(); node.static = isStatic; node.proto = protoStart != null; node.kind = kind; let optional = false; if (this.isRelational("<") || this.match(types.parenL)) { node.method = true; if (protoStart != null) { this.unexpected(protoStart); } if (variance) { this.unexpected(variance.start); } node.value = this.flowParseObjectTypeMethodish(this.startNodeAt(node.start, node.loc.start)); if (kind === "get" || kind === "set") { this.flowCheckGetterSetterParams(node); } if (!allowSpread && node.key.name === "constructor" && node.value.this) { this.raise(node.value.this.start, FlowErrors.ThisParamBannedInConstructor); } } else { if (kind !== "init") this.unexpected(); node.method = false; if (this.eat(types.question)) { optional = true; } node.value = this.flowParseTypeInitialiser(); node.variance = variance; } node.optional = optional; return this.finishNode(node, "ObjectTypeProperty"); } } flowCheckGetterSetterParams(property) { const paramCount = property.kind === "get" ? 0 : 1; const start = property.start; const length = property.value.params.length + (property.value.rest ? 1 : 0); if (property.value.this) { this.raise(property.value.this.start, property.kind === "get" ? FlowErrors.GetterMayNotHaveThisParam : FlowErrors.SetterMayNotHaveThisParam); } if (length !== paramCount) { if (property.kind === "get") { this.raise(start, ErrorMessages.BadGetterArity); } else { this.raise(start, ErrorMessages.BadSetterArity); } } if (property.kind === "set" && property.value.rest) { this.raise(start, ErrorMessages.BadSetterRestParameter); } } flowObjectTypeSemicolon() { if (!this.eat(types.semi) && !this.eat(types.comma) && !this.match(types.braceR) && !this.match(types.braceBarR)) { this.unexpected(); } } flowParseQualifiedTypeIdentifier(startPos, startLoc, id) { startPos = startPos || this.state.start; startLoc = startLoc || this.state.startLoc; let node = id || this.flowParseRestrictedIdentifier(true); while (this.eat(types.dot)) { const node2 = this.startNodeAt(startPos, startLoc); node2.qualification = node; node2.id = this.flowParseRestrictedIdentifier(true); node = this.finishNode(node2, "QualifiedTypeIdentifier"); } return node; } flowParseGenericType(startPos, startLoc, id) { const node = this.startNodeAt(startPos, startLoc); node.typeParameters = null; node.id = this.flowParseQualifiedTypeIdentifier(startPos, startLoc, id); if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterInstantiation(); } return this.finishNode(node, "GenericTypeAnnotation"); } flowParseTypeofType() { const node = this.startNode(); this.expect(types._typeof); node.argument = this.flowParsePrimaryType(); return this.finishNode(node, "TypeofTypeAnnotation"); } flowParseTupleType() { const node = this.startNode(); node.types = []; this.expect(types.bracketL); while (this.state.pos < this.length && !this.match(types.bracketR)) { node.types.push(this.flowParseType()); if (this.match(types.bracketR)) break; this.expect(types.comma); } this.expect(types.bracketR); return this.finishNode(node, "TupleTypeAnnotation"); } flowParseFunctionTypeParam(first) { let name = null; let optional = false; let typeAnnotation = null; const node = this.startNode(); const lh = this.lookahead(); const isThis = this.state.type === types._this; if (lh.type === types.colon || lh.type === types.question) { if (isThis && !first) { this.raise(node.start, FlowErrors.ThisParamMustBeFirst); } name = this.parseIdentifier(isThis); if (this.eat(types.question)) { optional = true; if (isThis) { this.raise(node.start, FlowErrors.ThisParamMayNotBeOptional); } } typeAnnotation = this.flowParseTypeInitialiser(); } else { typeAnnotation = this.flowParseType(); } node.name = name; node.optional = optional; node.typeAnnotation = typeAnnotation; return this.finishNode(node, "FunctionTypeParam"); } reinterpretTypeAsFunctionTypeParam(type) { const node = this.startNodeAt(type.start, type.loc.start); node.name = null; node.optional = false; node.typeAnnotation = type; return this.finishNode(node, "FunctionTypeParam"); } flowParseFunctionTypeParams(params = []) { let rest = null; let _this = null; if (this.match(types._this)) { _this = this.flowParseFunctionTypeParam(true); _this.name = null; if (!this.match(types.parenR)) { this.expect(types.comma); } } while (!this.match(types.parenR) && !this.match(types.ellipsis)) { params.push(this.flowParseFunctionTypeParam(false)); if (!this.match(types.parenR)) { this.expect(types.comma); } } if (this.eat(types.ellipsis)) { rest = this.flowParseFunctionTypeParam(false); } return { params, rest, _this }; } flowIdentToTypeAnnotation(startPos, startLoc, node, id) { switch (id.name) { case "any": return this.finishNode(node, "AnyTypeAnnotation"); case "bool": case "boolean": return this.finishNode(node, "BooleanTypeAnnotation"); case "mixed": return this.finishNode(node, "MixedTypeAnnotation"); case "empty": return this.finishNode(node, "EmptyTypeAnnotation"); case "number": return this.finishNode(node, "NumberTypeAnnotation"); case "string": return this.finishNode(node, "StringTypeAnnotation"); case "symbol": return this.finishNode(node, "SymbolTypeAnnotation"); default: this.checkNotUnderscore(id.name); return this.flowParseGenericType(startPos, startLoc, id); } } flowParsePrimaryType() { const startPos = this.state.start; const startLoc = this.state.startLoc; const node = this.startNode(); let tmp; let type; let isGroupedType = false; const oldNoAnonFunctionType = this.state.noAnonFunctionType; switch (this.state.type) { case types.name: if (this.isContextual("interface")) { return this.flowParseInterfaceType(); } return this.flowIdentToTypeAnnotation(startPos, startLoc, node, this.parseIdentifier()); case types.braceL: return this.flowParseObjectType({ allowStatic: false, allowExact: false, allowSpread: true, allowProto: false, allowInexact: true }); case types.braceBarL: return this.flowParseObjectType({ allowStatic: false, allowExact: true, allowSpread: true, allowProto: false, allowInexact: false }); case types.bracketL: this.state.noAnonFunctionType = false; type = this.flowParseTupleType(); this.state.noAnonFunctionType = oldNoAnonFunctionType; return type; case types.relational: if (this.state.value === "<") { node.typeParameters = this.flowParseTypeParameterDeclaration(); this.expect(types.parenL); tmp = this.flowParseFunctionTypeParams(); node.params = tmp.params; node.rest = tmp.rest; node.this = tmp._this; this.expect(types.parenR); this.expect(types.arrow); node.returnType = this.flowParseType(); return this.finishNode(node, "FunctionTypeAnnotation"); } break; case types.parenL: this.next(); if (!this.match(types.parenR) && !this.match(types.ellipsis)) { if (this.match(types.name) || this.match(types._this)) { const token = this.lookahead().type; isGroupedType = token !== types.question && token !== types.colon; } else { isGroupedType = true; } } if (isGroupedType) { this.state.noAnonFunctionType = false; type = this.flowParseType(); this.state.noAnonFunctionType = oldNoAnonFunctionType; if (this.state.noAnonFunctionType || !(this.match(types.comma) || this.match(types.parenR) && this.lookahead().type === types.arrow)) { this.expect(types.parenR); return type; } else { this.eat(types.comma); } } if (type) { tmp = this.flowParseFunctionTypeParams([this.reinterpretTypeAsFunctionTypeParam(type)]); } else { tmp = this.flowParseFunctionTypeParams(); } node.params = tmp.params; node.rest = tmp.rest; node.this = tmp._this; this.expect(types.parenR); this.expect(types.arrow); node.returnType = this.flowParseType(); node.typeParameters = null; return this.finishNode(node, "FunctionTypeAnnotation"); case types.string: return this.parseLiteral(this.state.value, "StringLiteralTypeAnnotation"); case types._true: case types._false: node.value = this.match(types._true); this.next(); return this.finishNode(node, "BooleanLiteralTypeAnnotation"); case types.plusMin: if (this.state.value === "-") { this.next(); if (this.match(types.num)) { return this.parseLiteral(-this.state.value, "NumberLiteralTypeAnnotation", node.start, node.loc.start); } if (this.match(types.bigint)) { return this.parseLiteral(-this.state.value, "BigIntLiteralTypeAnnotation", node.start, node.loc.start); } throw this.raise(this.state.start, FlowErrors.UnexpectedSubtractionOperand); } throw this.unexpected(); case types.num: return this.parseLiteral(this.state.value, "NumberLiteralTypeAnnotation"); case types.bigint: return this.parseLiteral(this.state.value, "BigIntLiteralTypeAnnotation"); case types._void: this.next(); return this.finishNode(node, "VoidTypeAnnotation"); case types._null: this.next(); return this.finishNode(node, "NullLiteralTypeAnnotation"); case types._this: this.next(); return this.finishNode(node, "ThisTypeAnnotation"); case types.star: this.next(); return this.finishNode(node, "ExistsTypeAnnotation"); default: if (this.state.type.keyword === "typeof") { return this.flowParseTypeofType(); } else if (this.state.type.keyword) { const label = this.state.type.label; this.next(); return super.createIdentifier(node, label); } } throw this.unexpected(); } flowParsePostfixType() { const startPos = this.state.start, startLoc = this.state.startLoc; let type = this.flowParsePrimaryType(); while (this.match(types.bracketL) && !this.canInsertSemicolon()) { const node = this.startNodeAt(startPos, startLoc); node.elementType = type; this.expect(types.bracketL); this.expect(types.bracketR); type = this.finishNode(node, "ArrayTypeAnnotation"); } return type; } flowParsePrefixType() { const node = this.startNode(); if (this.eat(types.question)) { node.typeAnnotation = this.flowParsePrefixType(); return this.finishNode(node, "NullableTypeAnnotation"); } else { return this.flowParsePostfixType(); } } flowParseAnonFunctionWithoutParens() { const param = this.flowParsePrefixType(); if (!this.state.noAnonFunctionType && this.eat(types.arrow)) { const node = this.startNodeAt(param.start, param.loc.start); node.params = [this.reinterpretTypeAsFunctionTypeParam(param)]; node.rest = null; node.this = null; node.returnType = this.flowParseType(); node.typeParameters = null; return this.finishNode(node, "FunctionTypeAnnotation"); } return param; } flowParseIntersectionType() { const node = this.startNode(); this.eat(types.bitwiseAND); const type = this.flowParseAnonFunctionWithoutParens(); node.types = [type]; while (this.eat(types.bitwiseAND)) { node.types.push(this.flowParseAnonFunctionWithoutParens()); } return node.types.length === 1 ? type : this.finishNode(node, "IntersectionTypeAnnotation"); } flowParseUnionType() { const node = this.startNode(); this.eat(types.bitwiseOR); const type = this.flowParseIntersectionType(); node.types = [type]; while (this.eat(types.bitwiseOR)) { node.types.push(this.flowParseIntersectionType()); } return node.types.length === 1 ? type : this.finishNode(node, "UnionTypeAnnotation"); } flowParseType() { const oldInType = this.state.inType; this.state.inType = true; const type = this.flowParseUnionType(); this.state.inType = oldInType; this.state.exprAllowed = this.state.exprAllowed || this.state.noAnonFunctionType; return type; } flowParseTypeOrImplicitInstantiation() { if (this.state.type === types.name && this.state.value === "_") { const startPos = this.state.start; const startLoc = this.state.startLoc; const node = this.parseIdentifier(); return this.flowParseGenericType(startPos, startLoc, node); } else { return this.flowParseType(); } } flowParseTypeAnnotation() { const node = this.startNode(); node.typeAnnotation = this.flowParseTypeInitialiser(); return this.finishNode(node, "TypeAnnotation"); } flowParseTypeAnnotatableIdentifier(allowPrimitiveOverride) { const ident = allowPrimitiveOverride ? this.parseIdentifier() : this.flowParseRestrictedIdentifier(); if (this.match(types.colon)) { ident.typeAnnotation = this.flowParseTypeAnnotation(); this.resetEndLocation(ident); } return ident; } typeCastToParameter(node) { node.expression.typeAnnotation = node.typeAnnotation; this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end); return node.expression; } flowParseVariance() { let variance = null; if (this.match(types.plusMin)) { variance = this.startNode(); if (this.state.value === "+") { variance.kind = "plus"; } else { variance.kind = "minus"; } this.next(); this.finishNode(variance, "Variance"); } return variance; } parseFunctionBody(node, allowExpressionBody, isMethod = false) { if (allowExpressionBody) { return this.forwardNoArrowParamsConversionAt(node, () => super.parseFunctionBody(node, true, isMethod)); } return super.parseFunctionBody(node, false, isMethod); } parseFunctionBodyAndFinish(node, type, isMethod = false) { if (this.match(types.colon)) { const typeNode = this.startNode(); [typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser(); node.returnType = typeNode.typeAnnotation ? this.finishNode(typeNode, "TypeAnnotation") : null; } super.parseFunctionBodyAndFinish(node, type, isMethod); } parseStatement(context, topLevel) { if (this.state.strict && this.match(types.name) && this.state.value === "interface") { const lookahead = this.lookahead(); if (lookahead.type === types.name || isKeyword(lookahead.value)) { const node = this.startNode(); this.next(); return this.flowParseInterface(node); } } else if (this.shouldParseEnums() && this.isContextual("enum")) { const node = this.startNode(); this.next(); return this.flowParseEnumDeclaration(node); } const stmt = super.parseStatement(context, topLevel); if (this.flowPragma === undefined && !this.isValidDirective(stmt)) { this.flowPragma = null; } return stmt; } parseExpressionStatement(node, expr) { if (expr.type === "Identifier") { if (expr.name === "declare") { if (this.match(types._class) || this.match(types.name) || this.match(types._function) || this.match(types._var) || this.match(types._export)) { return this.flowParseDeclare(node); } } else if (this.match(types.name)) { if (expr.name === "interface") { return this.flowParseInterface(node); } else if (expr.name === "type") { return this.flowParseTypeAlias(node); } else if (expr.name === "opaque") { return this.flowParseOpaqueType(node, false); } } } return super.parseExpressionStatement(node, expr); } shouldParseExportDeclaration() { return this.isContextual("type") || this.isContextual("interface") || this.isContextual("opaque") || this.shouldParseEnums() && this.isContextual("enum") || super.shouldParseExportDeclaration(); } isExportDefaultSpecifier() { if (this.match(types.name) && (this.state.value === "type" || this.state.value === "interface" || this.state.value === "opaque" || this.shouldParseEnums() && this.state.value === "enum")) { return false; } return super.isExportDefaultSpecifier(); } parseExportDefaultExpression() { if (this.shouldParseEnums() && this.isContextual("enum")) { const node = this.startNode(); this.next(); return this.flowParseEnumDeclaration(node); } return super.parseExportDefaultExpression(); } parseConditional(expr, startPos, startLoc, refNeedsArrowPos) { if (!this.match(types.question)) return expr; if (refNeedsArrowPos) { const result = this.tryParse(() => super.parseConditional(expr, startPos, startLoc)); if (!result.node) { refNeedsArrowPos.start = result.error.pos || this.state.start; return expr; } if (result.error) this.state = result.failState; return result.node; } this.expect(types.question); const state = this.state.clone(); const originalNoArrowAt = this.state.noArrowAt; const node = this.startNodeAt(startPos, startLoc); let { consequent, failed } = this.tryParseConditionalConsequent(); let [valid, invalid] = this.getArrowLikeExpressions(consequent); if (failed || invalid.length > 0) { const noArrowAt = [...originalNoArrowAt]; if (invalid.length > 0) { this.state = state; this.state.noArrowAt = noArrowAt; for (let i = 0; i < invalid.length; i++) { noArrowAt.push(invalid[i].start); } ({ consequent, failed } = this.tryParseConditionalConsequent()); [valid, invalid] = this.getArrowLikeExpressions(consequent); } if (failed && valid.length > 1) { this.raise(state.start, FlowErrors.AmbiguousConditionalArrow); } if (failed && valid.length === 1) { this.state = state; this.state.noArrowAt = noArrowAt.concat(valid[0].start); ({ consequent, failed } = this.tryParseConditionalConsequent()); } } this.getArrowLikeExpressions(consequent, true); this.state.noArrowAt = originalNoArrowAt; this.expect(types.colon); node.test = expr; node.consequent = consequent; node.alternate = this.forwardNoArrowParamsConversionAt(node, () => this.parseMaybeAssign(undefined, undefined, undefined)); return this.finishNode(node, "ConditionalExpression"); } tryParseConditionalConsequent() { this.state.noArrowParamsConversionAt.push(this.state.start); const consequent = this.parseMaybeAssignAllowIn(); const failed = !this.match(types.colon); this.state.noArrowParamsConversionAt.pop(); return { consequent, failed }; } getArrowLikeExpressions(node, disallowInvalid) { const stack = [node]; const arrows = []; while (stack.length !== 0) { const node = stack.pop(); if (node.type === "ArrowFunctionExpression") { if (node.typeParameters || !node.returnType) { this.finishArrowValidation(node); } else { arrows.push(node); } stack.push(node.body); } else if (node.type === "ConditionalExpression") { stack.push(node.consequent); stack.push(node.alternate); } } if (disallowInvalid) { arrows.forEach(node => this.finishArrowValidation(node)); return [arrows, []]; } return partition(arrows, node => node.params.every(param => this.isAssignable(param, true))); } finishArrowValidation(node) { var _node$extra; this.toAssignableList(node.params, (_node$extra = node.extra) == null ? void 0 : _node$extra.trailingComma, false); this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW); super.checkParams(node, false, true); this.scope.exit(); } forwardNoArrowParamsConversionAt(node, parse) { let result; if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) { this.state.noArrowParamsConversionAt.push(this.state.start); result = parse(); this.state.noArrowParamsConversionAt.pop(); } else { result = parse(); } return result; } parseParenItem(node, startPos, startLoc) { node = super.parseParenItem(node, startPos, startLoc); if (this.eat(types.question)) { node.optional = true; this.resetEndLocation(node); } if (this.match(types.colon)) { const typeCastNode = this.startNodeAt(startPos, startLoc); typeCastNode.expression = node; typeCastNode.typeAnnotation = this.flowParseTypeAnnotation(); return this.finishNode(typeCastNode, "TypeCastExpression"); } return node; } assertModuleNodeAllowed(node) { if (node.type === "ImportDeclaration" && (node.importKind === "type" || node.importKind === "typeof") || node.type === "ExportNamedDeclaration" && node.exportKind === "type" || node.type === "ExportAllDeclaration" && node.exportKind === "type") { return; } super.assertModuleNodeAllowed(node); } parseExport(node) { const decl = super.parseExport(node); if (decl.type === "ExportNamedDeclaration" || decl.type === "ExportAllDeclaration") { decl.exportKind = decl.exportKind || "value"; } return decl; } parseExportDeclaration(node) { if (this.isContextual("type")) { node.exportKind = "type"; const declarationNode = this.startNode(); this.next(); if (this.match(types.braceL)) { node.specifiers = this.parseExportSpecifiers(); this.parseExportFrom(node); return null; } else { return this.flowParseTypeAlias(declarationNode); } } else if (this.isContextual("opaque")) { node.exportKind = "type"; const declarationNode = this.startNode(); this.next(); return this.flowParseOpaqueType(declarationNode, false); } else if (this.isContextual("interface")) { node.exportKind = "type"; const declarationNode = this.startNode(); this.next(); return this.flowParseInterface(declarationNode); } else if (this.shouldParseEnums() && this.isContextual("enum")) { node.exportKind = "value"; const declarationNode = this.startNode(); this.next(); return this.flowParseEnumDeclaration(declarationNode); } else { return super.parseExportDeclaration(node); } } eatExportStar(node) { if (super.eatExportStar(...arguments)) return true; if (this.isContextual("type") && this.lookahead().type === types.star) { node.exportKind = "type"; this.next(); this.next(); return true; } return false; } maybeParseExportNamespaceSpecifier(node) { const pos = this.state.start; const hasNamespace = super.maybeParseExportNamespaceSpecifier(node); if (hasNamespace && node.exportKind === "type") { this.unexpected(pos); } return hasNamespace; } parseClassId(node, isStatement, optionalId) { super.parseClassId(node, isStatement, optionalId); if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterDeclaration(); } } parseClassMember(classBody, member, state) { const pos = this.state.start; if (this.isContextual("declare")) { if (this.parseClassMemberFromModifier(classBody, member)) { return; } member.declare = true; } super.parseClassMember(classBody, member, state); if (member.declare) { if (member.type !== "ClassProperty" && member.type !== "ClassPrivateProperty" && member.type !== "PropertyDefinition") { this.raise(pos, FlowErrors.DeclareClassElement); } else if (member.value) { this.raise(member.value.start, FlowErrors.DeclareClassFieldInitializer); } } } getTokenFromCode(code) { const next = this.input.charCodeAt(this.state.pos + 1); if (code === 123 && next === 124) { return this.finishOp(types.braceBarL, 2); } else if (this.state.inType && (code === 62 || code === 60)) { return this.finishOp(types.relational, 1); } else if (this.state.inType && code === 63) { return this.finishOp(types.question, 1); } else if (isIteratorStart(code, next)) { this.state.isIterator = true; return super.readWord(); } else { return super.getTokenFromCode(code); } } isAssignable(node, isBinding) { switch (node.type) { case "Identifier": case "ObjectPattern": case "ArrayPattern": case "AssignmentPattern": return true; case "ObjectExpression": { const last = node.properties.length - 1; return node.properties.every((prop, i) => { return prop.type !== "ObjectMethod" && (i === last || prop.type === "SpreadElement") && this.isAssignable(prop); }); } case "ObjectProperty": return this.isAssignable(node.value); case "SpreadElement": return this.isAssignable(node.argument); case "ArrayExpression": return node.elements.every(element => this.isAssignable(element)); case "AssignmentExpression": return node.operator === "="; case "ParenthesizedExpression": case "TypeCastExpression": return this.isAssignable(node.expression); case "MemberExpression": case "OptionalMemberExpression": return !isBinding; default: return false; } } toAssignable(node, isLHS = false) { if (node.type === "TypeCastExpression") { return super.toAssignable(this.typeCastToParameter(node), isLHS); } else { return super.toAssignable(node, isLHS); } } toAssignableList(exprList, trailingCommaPos, isLHS) { for (let i = 0; i < exprList.length; i++) { const expr = exprList[i]; if ((expr == null ? void 0 : expr.type) === "TypeCastExpression") { exprList[i] = this.typeCastToParameter(expr); } } return super.toAssignableList(exprList, trailingCommaPos, isLHS); } toReferencedList(exprList, isParenthesizedExpr) { for (let i = 0; i < exprList.length; i++) { var _expr$extra; const expr = exprList[i]; if (expr && expr.type === "TypeCastExpression" && !((_expr$extra = expr.extra) != null && _expr$extra.parenthesized) && (exprList.length > 1 || !isParenthesizedExpr)) { this.raise(expr.typeAnnotation.start, FlowErrors.TypeCastInPattern); } } return exprList; } parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) { const node = super.parseArrayLike(close, canBePattern, isTuple, refExpressionErrors); if (canBePattern && !this.state.maybeInArrowParameters) { this.toReferencedList(node.elements); } return node; } checkLVal(expr, ...args) { if (expr.type !== "TypeCastExpression") { return super.checkLVal(expr, ...args); } } parseClassProperty(node) { if (this.match(types.colon)) { node.typeAnnotation = this.flowParseTypeAnnotation(); } return super.parseClassProperty(node); } parseClassPrivateProperty(node) { if (this.match(types.colon)) { node.typeAnnotation = this.flowParseTypeAnnotation(); } return super.parseClassPrivateProperty(node); } isClassMethod() { return this.isRelational("<") || super.isClassMethod(); } isClassProperty() { return this.match(types.colon) || super.isClassProperty(); } isNonstaticConstructor(method) { return !this.match(types.colon) && super.isNonstaticConstructor(method); } isThisParam(param) { return param.type === "Identifier" && param.name === "this"; } pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) { if (method.variance) { this.unexpected(method.variance.start); } delete method.variance; if (this.isRelational("<")) { method.typeParameters = this.flowParseTypeParameterDeclaration(); } super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper); if (method.params && isConstructor) { const params = method.params; if (params.length > 0 && this.isThisParam(params[0])) { this.raise(method.start, FlowErrors.ThisParamBannedInConstructor); } } else if (method.type === "MethodDefinition" && isConstructor && method.value.params) { const params = method.value.params; if (params.length > 0 && this.isThisParam(params[0])) { this.raise(method.start, FlowErrors.ThisParamBannedInConstructor); } } } pushClassPrivateMethod(classBody, method, isGenerator, isAsync) { if (method.variance) { this.unexpected(method.variance.start); } delete method.variance; if (this.isRelational("<")) { method.typeParameters = this.flowParseTypeParameterDeclaration(); } super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync); } parseClassSuper(node) { super.parseClassSuper(node); if (node.superClass && this.isRelational("<")) { node.superTypeParameters = this.flowParseTypeParameterInstantiation(); } if (this.isContextual("implements")) { this.next(); const implemented = node.implements = []; do { const node = this.startNode(); node.id = this.flowParseRestrictedIdentifier(true); if (this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterInstantiation(); } else { node.typeParameters = null; } implemented.push(this.finishNode(node, "ClassImplements")); } while (this.eat(types.comma)); } } checkGetterSetterParams(method) { super.checkGetterSetterParams(method); const params = this.getObjectOrClassMethodParams(method); if (params.length > 0) { const param = params[0]; if (this.isThisParam(param) && method.kind === "get") { this.raise(param.start, FlowErrors.GetterMayNotHaveThisParam); } else if (this.isThisParam(param)) { this.raise(param.start, FlowErrors.SetterMayNotHaveThisParam); } } } parsePropertyName(node, isPrivateNameAllowed) { const variance = this.flowParseVariance(); const key = super.parsePropertyName(node, isPrivateNameAllowed); node.variance = variance; return key; } parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors) { if (prop.variance) { this.unexpected(prop.variance.start); } delete prop.variance; let typeParameters; if (this.isRelational("<") && !isAccessor) { typeParameters = this.flowParseTypeParameterDeclaration(); if (!this.match(types.parenL)) this.unexpected(); } super.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors); if (typeParameters) { (prop.value || prop).typeParameters = typeParameters; } } parseAssignableListItemTypes(param) { if (this.eat(types.question)) { if (param.type !== "Identifier") { this.raise(param.start, FlowErrors.OptionalBindingPattern); } if (this.isThisParam(param)) { this.raise(param.start, FlowErrors.ThisParamMayNotBeOptional); } param.optional = true; } if (this.match(types.colon)) { param.typeAnnotation = this.flowParseTypeAnnotation(); } else if (this.isThisParam(param)) { this.raise(param.start, FlowErrors.ThisParamAnnotationRequired); } if (this.match(types.eq) && this.isThisParam(param)) { this.raise(param.start, FlowErrors.ThisParamNoDefault); } this.resetEndLocation(param); return param; } parseMaybeDefault(startPos, startLoc, left) { const node = super.parseMaybeDefault(startPos, startLoc, left); if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) { this.raise(node.typeAnnotation.start, FlowErrors.TypeBeforeInitializer); } return node; } shouldParseDefaultImport(node) { if (!hasTypeImportKind(node)) { return super.shouldParseDefaultImport(node); } return isMaybeDefaultImport(this.state); } parseImportSpecifierLocal(node, specifier, type, contextDescription) { specifier.local = hasTypeImportKind(node) ? this.flowParseRestrictedIdentifier(true, true) : this.parseIdentifier(); this.checkLVal(specifier.local, contextDescription, BIND_LEXICAL); node.specifiers.push(this.finishNode(specifier, type)); } maybeParseDefaultImportSpecifier(node) { node.importKind = "value"; let kind = null; if (this.match(types._typeof)) { kind = "typeof"; } else if (this.isContextual("type")) { kind = "type"; } if (kind) { const lh = this.lookahead(); if (kind === "type" && lh.type === types.star) { this.unexpected(lh.start); } if (isMaybeDefaultImport(lh) || lh.type === types.braceL || lh.type === types.star) { this.next(); node.importKind = kind; } } return super.maybeParseDefaultImportSpecifier(node); } parseImportSpecifier(node) { const specifier = this.startNode(); const firstIdentLoc = this.state.start; const firstIdent = this.parseModuleExportName(); let specifierTypeKind = null; if (firstIdent.type === "Identifier") { if (firstIdent.name === "type") { specifierTypeKind = "type"; } else if (firstIdent.name === "typeof") { specifierTypeKind = "typeof"; } } let isBinding = false; if (this.isContextual("as") && !this.isLookaheadContextual("as")) { const as_ident = this.parseIdentifier(true); if (specifierTypeKind !== null && !this.match(types.name) && !this.state.type.keyword) { specifier.imported = as_ident; specifier.importKind = specifierTypeKind; specifier.local = as_ident.__clone(); } else { specifier.imported = firstIdent; specifier.importKind = null; specifier.local = this.parseIdentifier(); } } else if (specifierTypeKind !== null && (this.match(types.name) || this.state.type.keyword)) { specifier.imported = this.parseIdentifier(true); specifier.importKind = specifierTypeKind; if (this.eatContextual("as")) { specifier.local = this.parseIdentifier(); } else { isBinding = true; specifier.local = specifier.imported.__clone(); } } else { if (firstIdent.type === "StringLiteral") { throw this.raise(specifier.start, ErrorMessages.ImportBindingIsString, firstIdent.value); } isBinding = true; specifier.imported = firstIdent; specifier.importKind = null; specifier.local = specifier.imported.__clone(); } const nodeIsTypeImport = hasTypeImportKind(node); const specifierIsTypeImport = hasTypeImportKind(specifier); if (nodeIsTypeImport && specifierIsTypeImport) { this.raise(firstIdentLoc, FlowErrors.ImportTypeShorthandOnlyInPureImport); } if (nodeIsTypeImport || specifierIsTypeImport) { this.checkReservedType(specifier.local.name, specifier.local.start, true); } if (isBinding && !nodeIsTypeImport && !specifierIsTypeImport) { this.checkReservedWord(specifier.local.name, specifier.start, true, true); } this.checkLVal(specifier.local, "import specifier", BIND_LEXICAL); node.specifiers.push(this.finishNode(specifier, "ImportSpecifier")); } parseBindingAtom() { switch (this.state.type) { case types._this: return this.parseIdentifier(true); default: return super.parseBindingAtom(); } } parseFunctionParams(node, allowModifiers) { const kind = node.kind; if (kind !== "get" && kind !== "set" && this.isRelational("<")) { node.typeParameters = this.flowParseTypeParameterDeclaration(); } super.parseFunctionParams(node, allowModifiers); } parseVarId(decl, kind) { super.parseVarId(decl, kind); if (this.match(types.colon)) { decl.id.typeAnnotation = this.flowParseTypeAnnotation(); this.resetEndLocation(decl.id); } } parseAsyncArrowFromCallExpression(node, call) { if (this.match(types.colon)) { const oldNoAnonFunctionType = this.state.noAnonFunctionType; this.state.noAnonFunctionType = true; node.returnType = this.flowParseTypeAnnotation(); this.state.noAnonFunctionType = oldNoAnonFunctionType; } return super.parseAsyncArrowFromCallExpression(node, call); } shouldParseAsyncArrow() { return this.match(types.colon) || super.shouldParseAsyncArrow(); } parseMaybeAssign(refExpressionErrors, afterLeftParse, refNeedsArrowPos) { var _jsx; let state = null; let jsx; if (this.hasPlugin("jsx") && (this.match(types.jsxTagStart) || this.isRelational("<"))) { state = this.state.clone(); jsx = this.tryParse(() => super.parseMaybeAssign(refExpressionErrors, afterLeftParse, refNeedsArrowPos), state); if (!jsx.error) return jsx.node; const { context } = this.state; if (context[context.length - 1] === types$1.j_oTag) { context.length -= 2; } else if (context[context.length - 1] === types$1.j_expr) { context.length -= 1; } } if ((_jsx = jsx) != null && _jsx.error || this.isRelational("<")) { var _jsx2, _jsx3; state = state || this.state.clone(); let typeParameters; const arrow = this.tryParse(abort => { var _arrowExpression$extr; typeParameters = this.flowParseTypeParameterDeclaration(); const arrowExpression = this.forwardNoArrowParamsConversionAt(typeParameters, () => { const result = super.parseMaybeAssign(refExpressionErrors, afterLeftParse, refNeedsArrowPos); this.resetStartLocationFromNode(result, typeParameters); return result; }); if (arrowExpression.type !== "ArrowFunctionExpression" && (_arrowExpression$extr = arrowExpression.extra) != null && _arrowExpression$extr.parenthesized) { abort(); } const expr = this.maybeUnwrapTypeCastExpression(arrowExpression); expr.typeParameters = typeParameters; this.resetStartLocationFromNode(expr, typeParameters); return arrowExpression; }, state); let arrowExpression = null; if (arrow.node && this.maybeUnwrapTypeCastExpression(arrow.node).type === "ArrowFunctionExpression") { if (!arrow.error && !arrow.aborted) { if (arrow.node.async) { this.raise(typeParameters.start, FlowErrors.UnexpectedTypeParameterBeforeAsyncArrowFunction); } return arrow.node; } arrowExpression = arrow.node; } if ((_jsx2 = jsx) != null && _jsx2.node) { this.state = jsx.failState; return jsx.node; } if (arrowExpression) { this.state = arrow.failState; return arrowExpression; } if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error; if (arrow.thrown) throw arrow.error; throw this.raise(typeParameters.start, FlowErrors.UnexpectedTokenAfterTypeParameter); } return super.parseMaybeAssign(refExpressionErrors, afterLeftParse, refNeedsArrowPos); } parseArrow(node) { if (this.match(types.colon)) { const result = this.tryParse(() => { const oldNoAnonFunctionType = this.state.noAnonFunctionType; this.state.noAnonFunctionType = true; const typeNode = this.startNode(); [typeNode.typeAnnotation, node.predicate] = this.flowParseTypeAndPredicateInitialiser(); this.state.noAnonFunctionType = oldNoAnonFunctionType; if (this.canInsertSemicolon()) this.unexpected(); if (!this.match(types.arrow)) this.unexpected(); return typeNode; }); if (result.thrown) return null; if (result.error) this.state = result.failState; node.returnType = result.node.typeAnnotation ? this.finishNode(result.node, "TypeAnnotation") : null; } return super.parseArrow(node); } shouldParseArrow() { return this.match(types.colon) || super.shouldParseArrow(); } setArrowFunctionParameters(node, params) { if (this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) { node.params = params; } else { super.setArrowFunctionParameters(node, params); } } checkParams(node, allowDuplicates, isArrowFunction) { if (isArrowFunction && this.state.noArrowParamsConversionAt.indexOf(node.start) !== -1) { return; } for (let i = 0; i < node.params.length; i++) { if (this.isThisParam(node.params[i]) && i > 0) { this.raise(node.params[i].start, FlowErrors.ThisParamMustBeFirst); } } return super.checkParams(...arguments); } parseParenAndDistinguishExpression(canBeArrow) { return super.parseParenAndDistinguishExpression(canBeArrow && this.state.noArrowAt.indexOf(this.state.start) === -1); } parseSubscripts(base, startPos, startLoc, noCalls) { if (base.type === "Identifier" && base.name === "async" && this.state.noArrowAt.indexOf(startPos) !== -1) { this.next(); const node = this.startNodeAt(startPos, startLoc); node.callee = base; node.arguments = this.parseCallExpressionArguments(types.parenR, false); base = this.finishNode(node, "CallExpression"); } else if (base.type === "Identifier" && base.name === "async" && this.isRelational("<")) { const state = this.state.clone(); const arrow = this.tryParse(abort => this.parseAsyncArrowWithTypeParameters(startPos, startLoc) || abort(), state); if (!arrow.error && !arrow.aborted) return arrow.node; const result = this.tryParse(() => super.parseSubscripts(base, startPos, startLoc, noCalls), state); if (result.node && !result.error) return result.node; if (arrow.node) { this.state = arrow.failState; return arrow.node; } if (result.node) { this.state = result.failState; return result.node; } throw arrow.error || result.error; } return super.parseSubscripts(base, startPos, startLoc, noCalls); } parseSubscript(base, startPos, startLoc, noCalls, subscriptState) { if (this.match(types.questionDot) && this.isLookaheadToken_lt()) { subscriptState.optionalChainMember = true; if (noCalls) { subscriptState.stop = true; return base; } this.next(); const node = this.startNodeAt(startPos, startLoc); node.callee = base; node.typeArguments = this.flowParseTypeParameterInstantiation(); this.expect(types.parenL); node.arguments = this.parseCallExpressionArguments(types.parenR, false); node.optional = true; return this.finishCallExpression(node, true); } else if (!noCalls && this.shouldParseTypes() && this.isRelational("<")) { const node = this.startNodeAt(startPos, startLoc); node.callee = base; const result = this.tryParse(() => { node.typeArguments = this.flowParseTypeParameterInstantiationCallOrNew(); this.expect(types.parenL); node.arguments = this.parseCallExpressionArguments(types.parenR, false); if (subscriptState.optionalChainMember) node.optional = false; return this.finishCallExpression(node, subscriptState.optionalChainMember); }); if (result.node) { if (result.error) this.state = result.failState; return result.node; } } return super.parseSubscript(base, startPos, startLoc, noCalls, subscriptState); } parseNewArguments(node) { let targs = null; if (this.shouldParseTypes() && this.isRelational("<")) { targs = this.tryParse(() => this.flowParseTypeParameterInstantiationCallOrNew()).node; } node.typeArguments = targs; super.parseNewArguments(node); } parseAsyncArrowWithTypeParameters(startPos, startLoc) { const node = this.startNodeAt(startPos, startLoc); this.parseFunctionParams(node); if (!this.parseArrow(node)) return; return this.parseArrowExpression(node, undefined, true); } readToken_mult_modulo(code) { const next = this.input.charCodeAt(this.state.pos + 1); if (code === 42 && next === 47 && this.state.hasFlowComment) { this.state.hasFlowComment = false; this.state.pos += 2; this.nextToken(); return; } super.readToken_mult_modulo(code); } readToken_pipe_amp(code) { const next = this.input.charCodeAt(this.state.pos + 1); if (code === 124 && next === 125) { this.finishOp(types.braceBarR, 2); return; } super.readToken_pipe_amp(code); } parseTopLevel(file, program) { const fileNode = super.parseTopLevel(file, program); if (this.state.hasFlowComment) { this.raise(this.state.pos, FlowErrors.UnterminatedFlowComment); } return fileNode; } skipBlockComment() { if (this.hasPlugin("flowComments") && this.skipFlowComment()) { if (this.state.hasFlowComment) { this.unexpected(null, FlowErrors.NestedFlowComment); } this.hasFlowCommentCompletion(); this.state.pos += this.skipFlowComment(); this.state.hasFlowComment = true; return; } if (this.state.hasFlowComment) { const end = this.input.indexOf("*-/", this.state.pos += 2); if (end === -1) { throw this.raise(this.state.pos - 2, ErrorMessages.UnterminatedComment); } this.state.pos = end + 3; return; } super.skipBlockComment(); } skipFlowComment() { const { pos } = this.state; let shiftToFirstNonWhiteSpace = 2; while ([32, 9].includes(this.input.charCodeAt(pos + shiftToFirstNonWhiteSpace))) { shiftToFirstNonWhiteSpace++; } const ch2 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos); const ch3 = this.input.charCodeAt(shiftToFirstNonWhiteSpace + pos + 1); if (ch2 === 58 && ch3 === 58) { return shiftToFirstNonWhiteSpace + 2; } if (this.input.slice(shiftToFirstNonWhiteSpace + pos, shiftToFirstNonWhiteSpace + pos + 12) === "flow-include") { return shiftToFirstNonWhiteSpace + 12; } if (ch2 === 58 && ch3 !== 58) { return shiftToFirstNonWhiteSpace; } return false; } hasFlowCommentCompletion() { const end = this.input.indexOf("*/", this.state.pos); if (end === -1) { throw this.raise(this.state.pos, ErrorMessages.UnterminatedComment); } } flowEnumErrorBooleanMemberNotInitialized(pos, { enumName, memberName }) { this.raise(pos, FlowErrors.EnumBooleanMemberNotInitialized, memberName, enumName); } flowEnumErrorInvalidMemberName(pos, { enumName, memberName }) { const suggestion = memberName[0].toUpperCase() + memberName.slice(1); this.raise(pos, FlowErrors.EnumInvalidMemberName, memberName, suggestion, enumName); } flowEnumErrorDuplicateMemberName(pos, { enumName, memberName }) { this.raise(pos, FlowErrors.EnumDuplicateMemberName, memberName, enumName); } flowEnumErrorInconsistentMemberValues(pos, { enumName }) { this.raise(pos, FlowErrors.EnumInconsistentMemberValues, enumName); } flowEnumErrorInvalidExplicitType(pos, { enumName, suppliedType }) { return this.raise(pos, suppliedType === null ? FlowErrors.EnumInvalidExplicitTypeUnknownSupplied : FlowErrors.EnumInvalidExplicitType, enumName, suppliedType); } flowEnumErrorInvalidMemberInitializer(pos, { enumName, explicitType, memberName }) { let message = null; switch (explicitType) { case "boolean": case "number": case "string": message = FlowErrors.EnumInvalidMemberInitializerPrimaryType; break; case "symbol": message = FlowErrors.EnumInvalidMemberInitializerSymbolType; break; default: message = FlowErrors.EnumInvalidMemberInitializerUnknownType; } return this.raise(pos, message, enumName, memberName, explicitType); } flowEnumErrorNumberMemberNotInitialized(pos, { enumName, memberName }) { this.raise(pos, FlowErrors.EnumNumberMemberNotInitialized, enumName, memberName); } flowEnumErrorStringMemberInconsistentlyInitailized(pos, { enumName }) { this.raise(pos, FlowErrors.EnumStringMemberInconsistentlyInitailized, enumName); } flowEnumMemberInit() { const startPos = this.state.start; const endOfInit = () => this.match(types.comma) || this.match(types.braceR); switch (this.state.type) { case types.num: { const literal = this.parseLiteral(this.state.value, "NumericLiteral"); if (endOfInit()) { return { type: "number", pos: literal.start, value: literal }; } return { type: "invalid", pos: startPos }; } case types.string: { const literal = this.parseLiteral(this.state.value, "StringLiteral"); if (endOfInit()) { return { type: "string", pos: literal.start, value: literal }; } return { type: "invalid", pos: startPos }; } case types._true: case types._false: { const literal = this.parseBooleanLiteral(); if (endOfInit()) { return { type: "boolean", pos: literal.start, value: literal }; } return { type: "invalid", pos: startPos }; } default: return { type: "invalid", pos: startPos }; } } flowEnumMemberRaw() { const pos = this.state.start; const id = this.parseIdentifier(true); const init = this.eat(types.eq) ? this.flowEnumMemberInit() : { type: "none", pos }; return { id, init }; } flowEnumCheckExplicitTypeMismatch(pos, context, expectedType) { const { explicitType } = context; if (explicitType === null) { return; } if (explicitType !== expectedType) { this.flowEnumErrorInvalidMemberInitializer(pos, context); } } flowEnumMembers({ enumName, explicitType }) { const seenNames = new Set(); const members = { booleanMembers: [], numberMembers: [], stringMembers: [], defaultedMembers: [] }; let hasUnknownMembers = false; while (!this.match(types.braceR)) { if (this.eat(types.ellipsis)) { hasUnknownMembers = true; break; } const memberNode = this.startNode(); const { id, init } = this.flowEnumMemberRaw(); const memberName = id.name; if (memberName === "") { continue; } if (/^[a-z]/.test(memberName)) { this.flowEnumErrorInvalidMemberName(id.start, { enumName, memberName }); } if (seenNames.has(memberName)) { this.flowEnumErrorDuplicateMemberName(id.start, { enumName, memberName }); } seenNames.add(memberName); const context = { enumName, explicitType, memberName }; memberNode.id = id; switch (init.type) { case "boolean": { this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "boolean"); memberNode.init = init.value; members.booleanMembers.push(this.finishNode(memberNode, "EnumBooleanMember")); break; } case "number": { this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "number"); memberNode.init = init.value; members.numberMembers.push(this.finishNode(memberNode, "EnumNumberMember")); break; } case "string": { this.flowEnumCheckExplicitTypeMismatch(init.pos, context, "string"); memberNode.init = init.value; members.stringMembers.push(this.finishNode(memberNode, "EnumStringMember")); break; } case "invalid": { throw this.flowEnumErrorInvalidMemberInitializer(init.pos, context); } case "none": { switch (explicitType) { case "boolean": this.flowEnumErrorBooleanMemberNotInitialized(init.pos, context); break; case "number": this.flowEnumErrorNumberMemberNotInitialized(init.pos, context); break; default: members.defaultedMembers.push(this.finishNode(memberNode, "EnumDefaultedMember")); } } } if (!this.match(types.braceR)) { this.expect(types.comma); } } return { members, hasUnknownMembers }; } flowEnumStringMembers(initializedMembers, defaultedMembers, { enumName }) { if (initializedMembers.length === 0) { return defaultedMembers; } else if (defaultedMembers.length === 0) { return initializedMembers; } else if (defaultedMembers.length > initializedMembers.length) { for (const member of initializedMembers) { this.flowEnumErrorStringMemberInconsistentlyInitailized(member.start, { enumName }); } return defaultedMembers; } else { for (const member of defaultedMembers) { this.flowEnumErrorStringMemberInconsistentlyInitailized(member.start, { enumName }); } return initializedMembers; } } flowEnumParseExplicitType({ enumName }) { if (this.eatContextual("of")) { if (!this.match(types.name)) { throw this.flowEnumErrorInvalidExplicitType(this.state.start, { enumName, suppliedType: null }); } const { value } = this.state; this.next(); if (value !== "boolean" && value !== "number" && value !== "string" && value !== "symbol") { this.flowEnumErrorInvalidExplicitType(this.state.start, { enumName, suppliedType: value }); } return value; } return null; } flowEnumBody(node, { enumName, nameLoc }) { const explicitType = this.flowEnumParseExplicitType({ enumName }); this.expect(types.braceL); const { members, hasUnknownMembers } = this.flowEnumMembers({ enumName, explicitType }); node.hasUnknownMembers = hasUnknownMembers; switch (explicitType) { case "boolean": node.explicitType = true; node.members = members.booleanMembers; this.expect(types.braceR); return this.finishNode(node, "EnumBooleanBody"); case "number": node.explicitType = true; node.members = members.numberMembers; this.expect(types.braceR); return this.finishNode(node, "EnumNumberBody"); case "string": node.explicitType = true; node.members = this.flowEnumStringMembers(members.stringMembers, members.defaultedMembers, { enumName }); this.expect(types.braceR); return this.finishNode(node, "EnumStringBody"); case "symbol": node.members = members.defaultedMembers; this.expect(types.braceR); return this.finishNode(node, "EnumSymbolBody"); default: { const empty = () => { node.members = []; this.expect(types.braceR); return this.finishNode(node, "EnumStringBody"); }; node.explicitType = false; const boolsLen = members.booleanMembers.length; const numsLen = members.numberMembers.length; const strsLen = members.stringMembers.length; const defaultedLen = members.defaultedMembers.length; if (!boolsLen && !numsLen && !strsLen && !defaultedLen) { return empty(); } else if (!boolsLen && !numsLen) { node.members = this.flowEnumStringMembers(members.stringMembers, members.defaultedMembers, { enumName }); this.expect(types.braceR); return this.finishNode(node, "EnumStringBody"); } else if (!numsLen && !strsLen && boolsLen >= defaultedLen) { for (const member of members.defaultedMembers) { this.flowEnumErrorBooleanMemberNotInitialized(member.start, { enumName, memberName: member.id.name }); } node.members = members.booleanMembers; this.expect(types.braceR); return this.finishNode(node, "EnumBooleanBody"); } else if (!boolsLen && !strsLen && numsLen >= defaultedLen) { for (const member of members.defaultedMembers) { this.flowEnumErrorNumberMemberNotInitialized(member.start, { enumName, memberName: member.id.name }); } node.members = members.numberMembers; this.expect(types.braceR); return this.finishNode(node, "EnumNumberBody"); } else { this.flowEnumErrorInconsistentMemberValues(nameLoc, { enumName }); return empty(); } } } } flowParseEnumDeclaration(node) { const id = this.parseIdentifier(); node.id = id; node.body = this.flowEnumBody(this.startNode(), { enumName: id.name, nameLoc: id.start }); return this.finishNode(node, "EnumDeclaration"); } updateContext(prevType) { if (this.match(types.name) && this.state.value === "of" && prevType === types.name && this.input.slice(this.state.lastTokStart, this.state.lastTokEnd) === "interface") { this.state.exprAllowed = false; } else { super.updateContext(prevType); } } isLookaheadToken_lt() { const next = this.nextTokenStart(); if (this.input.charCodeAt(next) === 60) { const afterNext = this.input.charCodeAt(next + 1); return afterNext !== 60 && afterNext !== 61; } return false; } maybeUnwrapTypeCastExpression(node) { return node.type === "TypeCastExpression" ? node.expression : node; } }, _temp; }); const entities = { quot: "\u0022", amp: "&", apos: "\u0027", lt: "<", gt: ">", nbsp: "\u00A0", iexcl: "\u00A1", cent: "\u00A2", pound: "\u00A3", curren: "\u00A4", yen: "\u00A5", brvbar: "\u00A6", sect: "\u00A7", uml: "\u00A8", copy: "\u00A9", ordf: "\u00AA", laquo: "\u00AB", not: "\u00AC", shy: "\u00AD", reg: "\u00AE", macr: "\u00AF", deg: "\u00B0", plusmn: "\u00B1", sup2: "\u00B2", sup3: "\u00B3", acute: "\u00B4", micro: "\u00B5", para: "\u00B6", middot: "\u00B7", cedil: "\u00B8", sup1: "\u00B9", ordm: "\u00BA", raquo: "\u00BB", frac14: "\u00BC", frac12: "\u00BD", frac34: "\u00BE", iquest: "\u00BF", Agrave: "\u00C0", Aacute: "\u00C1", Acirc: "\u00C2", Atilde: "\u00C3", Auml: "\u00C4", Aring: "\u00C5", AElig: "\u00C6", Ccedil: "\u00C7", Egrave: "\u00C8", Eacute: "\u00C9", Ecirc: "\u00CA", Euml: "\u00CB", Igrave: "\u00CC", Iacute: "\u00CD", Icirc: "\u00CE", Iuml: "\u00CF", ETH: "\u00D0", Ntilde: "\u00D1", Ograve: "\u00D2", Oacute: "\u00D3", Ocirc: "\u00D4", Otilde: "\u00D5", Ouml: "\u00D6", times: "\u00D7", Oslash: "\u00D8", Ugrave: "\u00D9", Uacute: "\u00DA", Ucirc: "\u00DB", Uuml: "\u00DC", Yacute: "\u00DD", THORN: "\u00DE", szlig: "\u00DF", agrave: "\u00E0", aacute: "\u00E1", acirc: "\u00E2", atilde: "\u00E3", auml: "\u00E4", aring: "\u00E5", aelig: "\u00E6", ccedil: "\u00E7", egrave: "\u00E8", eacute: "\u00E9", ecirc: "\u00EA", euml: "\u00EB", igrave: "\u00EC", iacute: "\u00ED", icirc: "\u00EE", iuml: "\u00EF", eth: "\u00F0", ntilde: "\u00F1", ograve: "\u00F2", oacute: "\u00F3", ocirc: "\u00F4", otilde: "\u00F5", ouml: "\u00F6", divide: "\u00F7", oslash: "\u00F8", ugrave: "\u00F9", uacute: "\u00FA", ucirc: "\u00FB", uuml: "\u00FC", yacute: "\u00FD", thorn: "\u00FE", yuml: "\u00FF", OElig: "\u0152", oelig: "\u0153", Scaron: "\u0160", scaron: "\u0161", Yuml: "\u0178", fnof: "\u0192", circ: "\u02C6", tilde: "\u02DC", Alpha: "\u0391", Beta: "\u0392", Gamma: "\u0393", Delta: "\u0394", Epsilon: "\u0395", Zeta: "\u0396", Eta: "\u0397", Theta: "\u0398", Iota: "\u0399", Kappa: "\u039A", Lambda: "\u039B", Mu: "\u039C", Nu: "\u039D", Xi: "\u039E", Omicron: "\u039F", Pi: "\u03A0", Rho: "\u03A1", Sigma: "\u03A3", Tau: "\u03A4", Upsilon: "\u03A5", Phi: "\u03A6", Chi: "\u03A7", Psi: "\u03A8", Omega: "\u03A9", alpha: "\u03B1", beta: "\u03B2", gamma: "\u03B3", delta: "\u03B4", epsilon: "\u03B5", zeta: "\u03B6", eta: "\u03B7", theta: "\u03B8", iota: "\u03B9", kappa: "\u03BA", lambda: "\u03BB", mu: "\u03BC", nu: "\u03BD", xi: "\u03BE", omicron: "\u03BF", pi: "\u03C0", rho: "\u03C1", sigmaf: "\u03C2", sigma: "\u03C3", tau: "\u03C4", upsilon: "\u03C5", phi: "\u03C6", chi: "\u03C7", psi: "\u03C8", omega: "\u03C9", thetasym: "\u03D1", upsih: "\u03D2", piv: "\u03D6", ensp: "\u2002", emsp: "\u2003", thinsp: "\u2009", zwnj: "\u200C", zwj: "\u200D", lrm: "\u200E", rlm: "\u200F", ndash: "\u2013", mdash: "\u2014", lsquo: "\u2018", rsquo: "\u2019", sbquo: "\u201A", ldquo: "\u201C", rdquo: "\u201D", bdquo: "\u201E", dagger: "\u2020", Dagger: "\u2021", bull: "\u2022", hellip: "\u2026", permil: "\u2030", prime: "\u2032", Prime: "\u2033", lsaquo: "\u2039", rsaquo: "\u203A", oline: "\u203E", frasl: "\u2044", euro: "\u20AC", image: "\u2111", weierp: "\u2118", real: "\u211C", trade: "\u2122", alefsym: "\u2135", larr: "\u2190", uarr: "\u2191", rarr: "\u2192", darr: "\u2193", harr: "\u2194", crarr: "\u21B5", lArr: "\u21D0", uArr: "\u21D1", rArr: "\u21D2", dArr: "\u21D3", hArr: "\u21D4", forall: "\u2200", part: "\u2202", exist: "\u2203", empty: "\u2205", nabla: "\u2207", isin: "\u2208", notin: "\u2209", ni: "\u220B", prod: "\u220F", sum: "\u2211", minus: "\u2212", lowast: "\u2217", radic: "\u221A", prop: "\u221D", infin: "\u221E", ang: "\u2220", and: "\u2227", or: "\u2228", cap: "\u2229", cup: "\u222A", int: "\u222B", there4: "\u2234", sim: "\u223C", cong: "\u2245", asymp: "\u2248", ne: "\u2260", equiv: "\u2261", le: "\u2264", ge: "\u2265", sub: "\u2282", sup: "\u2283", nsub: "\u2284", sube: "\u2286", supe: "\u2287", oplus: "\u2295", otimes: "\u2297", perp: "\u22A5", sdot: "\u22C5", lceil: "\u2308", rceil: "\u2309", lfloor: "\u230A", rfloor: "\u230B", lang: "\u2329", rang: "\u232A", loz: "\u25CA", spades: "\u2660", clubs: "\u2663", hearts: "\u2665", diams: "\u2666" }; const HEX_NUMBER = /^[\da-fA-F]+$/; const DECIMAL_NUMBER = /^\d+$/; const JsxErrors = Object.freeze({ AttributeIsEmpty: "JSX attributes must only be assigned a non-empty expression", MissingClosingTagFragment: "Expected corresponding JSX closing tag for <>", MissingClosingTagElement: "Expected corresponding JSX closing tag for <%0>", UnexpectedSequenceExpression: "Sequence expressions cannot be directly nested inside JSX. Did you mean to wrap it in parentheses (...)?", UnsupportedJsxValue: "JSX value should be either an expression or a quoted JSX text", UnterminatedJsxContent: "Unterminated JSX contents", UnwrappedAdjacentJSXElements: "Adjacent JSX elements must be wrapped in an enclosing tag. Did you want a JSX fragment <>...?" }); types$1.j_oTag = new TokContext("...", true, true); types.jsxName = new TokenType("jsxName"); types.jsxText = new TokenType("jsxText", { beforeExpr: true }); types.jsxTagStart = new TokenType("jsxTagStart", { startsExpr: true }); types.jsxTagEnd = new TokenType("jsxTagEnd"); types.jsxTagStart.updateContext = function () { this.state.context.push(types$1.j_expr); this.state.context.push(types$1.j_oTag); this.state.exprAllowed = false; }; types.jsxTagEnd.updateContext = function (prevType) { const out = this.state.context.pop(); if (out === types$1.j_oTag && prevType === types.slash || out === types$1.j_cTag) { this.state.context.pop(); this.state.exprAllowed = this.curContext() === types$1.j_expr; } else { this.state.exprAllowed = true; } }; function isFragment(object) { return object ? object.type === "JSXOpeningFragment" || object.type === "JSXClosingFragment" : false; } function getQualifiedJSXName(object) { if (object.type === "JSXIdentifier") { return object.name; } if (object.type === "JSXNamespacedName") { return object.namespace.name + ":" + object.name.name; } if (object.type === "JSXMemberExpression") { return getQualifiedJSXName(object.object) + "." + getQualifiedJSXName(object.property); } throw new Error("Node had unexpected type: " + object.type); } var jsx = (superClass => class extends superClass { jsxReadToken() { let out = ""; let chunkStart = this.state.pos; for (;;) { if (this.state.pos >= this.length) { throw this.raise(this.state.start, JsxErrors.UnterminatedJsxContent); } const ch = this.input.charCodeAt(this.state.pos); switch (ch) { case 60: case 123: if (this.state.pos === this.state.start) { if (ch === 60 && this.state.exprAllowed) { ++this.state.pos; return this.finishToken(types.jsxTagStart); } return super.getTokenFromCode(ch); } out += this.input.slice(chunkStart, this.state.pos); return this.finishToken(types.jsxText, out); case 38: out += this.input.slice(chunkStart, this.state.pos); out += this.jsxReadEntity(); chunkStart = this.state.pos; break; case 62: case 125: default: if (isNewLine(ch)) { out += this.input.slice(chunkStart, this.state.pos); out += this.jsxReadNewLine(true); chunkStart = this.state.pos; } else { ++this.state.pos; } } } } jsxReadNewLine(normalizeCRLF) { const ch = this.input.charCodeAt(this.state.pos); let out; ++this.state.pos; if (ch === 13 && this.input.charCodeAt(this.state.pos) === 10) { ++this.state.pos; out = normalizeCRLF ? "\n" : "\r\n"; } else { out = String.fromCharCode(ch); } ++this.state.curLine; this.state.lineStart = this.state.pos; return out; } jsxReadString(quote) { let out = ""; let chunkStart = ++this.state.pos; for (;;) { if (this.state.pos >= this.length) { throw this.raise(this.state.start, ErrorMessages.UnterminatedString); } const ch = this.input.charCodeAt(this.state.pos); if (ch === quote) break; if (ch === 38) { out += this.input.slice(chunkStart, this.state.pos); out += this.jsxReadEntity(); chunkStart = this.state.pos; } else if (isNewLine(ch)) { out += this.input.slice(chunkStart, this.state.pos); out += this.jsxReadNewLine(false); chunkStart = this.state.pos; } else { ++this.state.pos; } } out += this.input.slice(chunkStart, this.state.pos++); return this.finishToken(types.string, out); } jsxReadEntity() { let str = ""; let count = 0; let entity; let ch = this.input[this.state.pos]; const startPos = ++this.state.pos; while (this.state.pos < this.length && count++ < 10) { ch = this.input[this.state.pos++]; if (ch === ";") { if (str[0] === "#") { if (str[1] === "x") { str = str.substr(2); if (HEX_NUMBER.test(str)) { entity = String.fromCodePoint(parseInt(str, 16)); } } else { str = str.substr(1); if (DECIMAL_NUMBER.test(str)) { entity = String.fromCodePoint(parseInt(str, 10)); } } } else { entity = entities[str]; } break; } str += ch; } if (!entity) { this.state.pos = startPos; return "&"; } return entity; } jsxReadWord() { let ch; const start = this.state.pos; do { ch = this.input.charCodeAt(++this.state.pos); } while (isIdentifierChar(ch) || ch === 45); return this.finishToken(types.jsxName, this.input.slice(start, this.state.pos)); } jsxParseIdentifier() { const node = this.startNode(); if (this.match(types.jsxName)) { node.name = this.state.value; } else if (this.state.type.keyword) { node.name = this.state.type.keyword; } else { this.unexpected(); } this.next(); return this.finishNode(node, "JSXIdentifier"); } jsxParseNamespacedName() { const startPos = this.state.start; const startLoc = this.state.startLoc; const name = this.jsxParseIdentifier(); if (!this.eat(types.colon)) return name; const node = this.startNodeAt(startPos, startLoc); node.namespace = name; node.name = this.jsxParseIdentifier(); return this.finishNode(node, "JSXNamespacedName"); } jsxParseElementName() { const startPos = this.state.start; const startLoc = this.state.startLoc; let node = this.jsxParseNamespacedName(); if (node.type === "JSXNamespacedName") { return node; } while (this.eat(types.dot)) { const newNode = this.startNodeAt(startPos, startLoc); newNode.object = node; newNode.property = this.jsxParseIdentifier(); node = this.finishNode(newNode, "JSXMemberExpression"); } return node; } jsxParseAttributeValue() { let node; switch (this.state.type) { case types.braceL: node = this.startNode(); this.next(); node = this.jsxParseExpressionContainer(node); if (node.expression.type === "JSXEmptyExpression") { this.raise(node.start, JsxErrors.AttributeIsEmpty); } return node; case types.jsxTagStart: case types.string: return this.parseExprAtom(); default: throw this.raise(this.state.start, JsxErrors.UnsupportedJsxValue); } } jsxParseEmptyExpression() { const node = this.startNodeAt(this.state.lastTokEnd, this.state.lastTokEndLoc); return this.finishNodeAt(node, "JSXEmptyExpression", this.state.start, this.state.startLoc); } jsxParseSpreadChild(node) { this.next(); node.expression = this.parseExpression(); this.expect(types.braceR); return this.finishNode(node, "JSXSpreadChild"); } jsxParseExpressionContainer(node) { if (this.match(types.braceR)) { node.expression = this.jsxParseEmptyExpression(); } else { const expression = this.parseExpression(); node.expression = expression; } this.expect(types.braceR); return this.finishNode(node, "JSXExpressionContainer"); } jsxParseAttribute() { const node = this.startNode(); if (this.eat(types.braceL)) { this.expect(types.ellipsis); node.argument = this.parseMaybeAssignAllowIn(); this.expect(types.braceR); return this.finishNode(node, "JSXSpreadAttribute"); } node.name = this.jsxParseNamespacedName(); node.value = this.eat(types.eq) ? this.jsxParseAttributeValue() : null; return this.finishNode(node, "JSXAttribute"); } jsxParseOpeningElementAt(startPos, startLoc) { const node = this.startNodeAt(startPos, startLoc); if (this.match(types.jsxTagEnd)) { this.expect(types.jsxTagEnd); return this.finishNode(node, "JSXOpeningFragment"); } node.name = this.jsxParseElementName(); return this.jsxParseOpeningElementAfterName(node); } jsxParseOpeningElementAfterName(node) { const attributes = []; while (!this.match(types.slash) && !this.match(types.jsxTagEnd)) { attributes.push(this.jsxParseAttribute()); } node.attributes = attributes; node.selfClosing = this.eat(types.slash); this.expect(types.jsxTagEnd); return this.finishNode(node, "JSXOpeningElement"); } jsxParseClosingElementAt(startPos, startLoc) { const node = this.startNodeAt(startPos, startLoc); if (this.match(types.jsxTagEnd)) { this.expect(types.jsxTagEnd); return this.finishNode(node, "JSXClosingFragment"); } node.name = this.jsxParseElementName(); this.expect(types.jsxTagEnd); return this.finishNode(node, "JSXClosingElement"); } jsxParseElementAt(startPos, startLoc) { const node = this.startNodeAt(startPos, startLoc); const children = []; const openingElement = this.jsxParseOpeningElementAt(startPos, startLoc); let closingElement = null; if (!openingElement.selfClosing) { contents: for (;;) { switch (this.state.type) { case types.jsxTagStart: startPos = this.state.start; startLoc = this.state.startLoc; this.next(); if (this.eat(types.slash)) { closingElement = this.jsxParseClosingElementAt(startPos, startLoc); break contents; } children.push(this.jsxParseElementAt(startPos, startLoc)); break; case types.jsxText: children.push(this.parseExprAtom()); break; case types.braceL: { const node = this.startNode(); this.next(); if (this.match(types.ellipsis)) { children.push(this.jsxParseSpreadChild(node)); } else { children.push(this.jsxParseExpressionContainer(node)); } break; } default: throw this.unexpected(); } } if (isFragment(openingElement) && !isFragment(closingElement)) { this.raise(closingElement.start, JsxErrors.MissingClosingTagFragment); } else if (!isFragment(openingElement) && isFragment(closingElement)) { this.raise(closingElement.start, JsxErrors.MissingClosingTagElement, getQualifiedJSXName(openingElement.name)); } else if (!isFragment(openingElement) && !isFragment(closingElement)) { if (getQualifiedJSXName(closingElement.name) !== getQualifiedJSXName(openingElement.name)) { this.raise(closingElement.start, JsxErrors.MissingClosingTagElement, getQualifiedJSXName(openingElement.name)); } } } if (isFragment(openingElement)) { node.openingFragment = openingElement; node.closingFragment = closingElement; } else { node.openingElement = openingElement; node.closingElement = closingElement; } node.children = children; if (this.isRelational("<")) { throw this.raise(this.state.start, JsxErrors.UnwrappedAdjacentJSXElements); } return isFragment(openingElement) ? this.finishNode(node, "JSXFragment") : this.finishNode(node, "JSXElement"); } jsxParseElement() { const startPos = this.state.start; const startLoc = this.state.startLoc; this.next(); return this.jsxParseElementAt(startPos, startLoc); } parseExprAtom(refExpressionErrors) { if (this.match(types.jsxText)) { return this.parseLiteral(this.state.value, "JSXText"); } else if (this.match(types.jsxTagStart)) { return this.jsxParseElement(); } else if (this.isRelational("<") && this.input.charCodeAt(this.state.pos) !== 33) { this.finishToken(types.jsxTagStart); return this.jsxParseElement(); } else { return super.parseExprAtom(refExpressionErrors); } } getTokenFromCode(code) { if (this.state.inPropertyName) return super.getTokenFromCode(code); const context = this.curContext(); if (context === types$1.j_expr) { return this.jsxReadToken(); } if (context === types$1.j_oTag || context === types$1.j_cTag) { if (isIdentifierStart(code)) { return this.jsxReadWord(); } if (code === 62) { ++this.state.pos; return this.finishToken(types.jsxTagEnd); } if ((code === 34 || code === 39) && context === types$1.j_oTag) { return this.jsxReadString(code); } } if (code === 60 && this.state.exprAllowed && this.input.charCodeAt(this.state.pos + 1) !== 33) { ++this.state.pos; return this.finishToken(types.jsxTagStart); } return super.getTokenFromCode(code); } updateContext(prevType) { if (this.match(types.braceL)) { const curContext = this.curContext(); if (curContext === types$1.j_oTag) { this.state.context.push(types$1.braceExpression); } else if (curContext === types$1.j_expr) { this.state.context.push(types$1.templateQuasi); } else { super.updateContext(prevType); } this.state.exprAllowed = true; } else if (this.match(types.slash) && prevType === types.jsxTagStart) { this.state.context.length -= 2; this.state.context.push(types$1.j_cTag); this.state.exprAllowed = false; } else { return super.updateContext(prevType); } } }); class TypeScriptScope extends Scope { constructor(...args) { super(...args); this.types = []; this.enums = []; this.constEnums = []; this.classes = []; this.exportOnlyBindings = []; } } class TypeScriptScopeHandler extends ScopeHandler { createScope(flags) { return new TypeScriptScope(flags); } declareName(name, bindingType, pos) { const scope = this.currentScope(); if (bindingType & BIND_FLAGS_TS_EXPORT_ONLY) { this.maybeExportDefined(scope, name); scope.exportOnlyBindings.push(name); return; } super.declareName(...arguments); if (bindingType & BIND_KIND_TYPE) { if (!(bindingType & BIND_KIND_VALUE)) { this.checkRedeclarationInScope(scope, name, bindingType, pos); this.maybeExportDefined(scope, name); } scope.types.push(name); } if (bindingType & BIND_FLAGS_TS_ENUM) scope.enums.push(name); if (bindingType & BIND_FLAGS_TS_CONST_ENUM) scope.constEnums.push(name); if (bindingType & BIND_FLAGS_CLASS) scope.classes.push(name); } isRedeclaredInScope(scope, name, bindingType) { if (scope.enums.indexOf(name) > -1) { if (bindingType & BIND_FLAGS_TS_ENUM) { const isConst = !!(bindingType & BIND_FLAGS_TS_CONST_ENUM); const wasConst = scope.constEnums.indexOf(name) > -1; return isConst !== wasConst; } return true; } if (bindingType & BIND_FLAGS_CLASS && scope.classes.indexOf(name) > -1) { if (scope.lexical.indexOf(name) > -1) { return !!(bindingType & BIND_KIND_VALUE); } else { return false; } } if (bindingType & BIND_KIND_TYPE && scope.types.indexOf(name) > -1) { return true; } return super.isRedeclaredInScope(...arguments); } checkLocalExport(id) { if (this.scopeStack[0].types.indexOf(id.name) === -1 && this.scopeStack[0].exportOnlyBindings.indexOf(id.name) === -1) { super.checkLocalExport(id); } } } const PARAM = 0b0000, PARAM_YIELD = 0b0001, PARAM_AWAIT = 0b0010, PARAM_RETURN = 0b0100, PARAM_IN = 0b1000; class ProductionParameterHandler { constructor() { this.stacks = []; } enter(flags) { this.stacks.push(flags); } exit() { this.stacks.pop(); } currentFlags() { return this.stacks[this.stacks.length - 1]; } get hasAwait() { return (this.currentFlags() & PARAM_AWAIT) > 0; } get hasYield() { return (this.currentFlags() & PARAM_YIELD) > 0; } get hasReturn() { return (this.currentFlags() & PARAM_RETURN) > 0; } get hasIn() { return (this.currentFlags() & PARAM_IN) > 0; } } function functionFlags(isAsync, isGenerator) { return (isAsync ? PARAM_AWAIT : 0) | (isGenerator ? PARAM_YIELD : 0); } function nonNull(x) { if (x == null) { throw new Error(`Unexpected ${x} value.`); } return x; } function assert(x) { if (!x) { throw new Error("Assert fail"); } } const TSErrors = Object.freeze({ AbstractMethodHasImplementation: "Method '%0' cannot have an implementation because it is marked abstract.", ClassMethodHasDeclare: "Class methods cannot have the 'declare' modifier", ClassMethodHasReadonly: "Class methods cannot have the 'readonly' modifier", ConstructorHasTypeParameters: "Type parameters cannot appear on a constructor declaration.", DeclareClassFieldHasInitializer: "Initializers are not allowed in ambient contexts.", DeclareFunctionHasImplementation: "An implementation cannot be declared in ambient contexts.", DuplicateModifier: "Duplicate modifier: '%0'", DuplicateAccessibilityModifier: "Accessibility modifier already seen.", EmptyHeritageClauseType: "'%0' list cannot be empty.", EmptyTypeArguments: "Type argument list cannot be empty.", EmptyTypeParameters: "Type parameter list cannot be empty.", ExpectedAmbientAfterExportDeclare: "'export declare' must be followed by an ambient declaration.", IndexSignatureHasAbstract: "Index signatures cannot have the 'abstract' modifier", IndexSignatureHasAccessibility: "Index signatures cannot have an accessibility modifier ('%0')", IndexSignatureHasStatic: "Index signatures cannot have the 'static' modifier", IndexSignatureHasDeclare: "Index signatures cannot have the 'declare' modifier", InvalidModifierOnTypeMember: "'%0' modifier cannot appear on a type member.", InvalidTupleMemberLabel: "Tuple members must be labeled with a simple identifier.", MixedLabeledAndUnlabeledElements: "Tuple members must all have names or all not have names.", NonAbstractClassHasAbstractMethod: "Abstract methods can only appear within an abstract class.", NonClassMethodPropertyHasAbstractModifer: "'abstract' modifier can only appear on a class, method, or property declaration.", OptionalTypeBeforeRequired: "A required element cannot follow an optional element.", PatternIsOptional: "A binding pattern parameter cannot be optional in an implementation signature.", PrivateElementHasAbstract: "Private elements cannot have the 'abstract' modifier.", PrivateElementHasAccessibility: "Private elements cannot have an accessibility modifier ('%0')", ReadonlyForMethodSignature: "'readonly' modifier can only appear on a property declaration or index signature.", TypeAnnotationAfterAssign: "Type annotations must come before default assignments, e.g. instead of `age = 25: number` use `age: number = 25`", UnexpectedParameterModifier: "A parameter property is only allowed in a constructor implementation.", UnexpectedReadonly: "'readonly' type modifier is only permitted on array and tuple literal types.", UnexpectedTypeAnnotation: "Did not expect a type annotation here.", UnexpectedTypeCastInParameter: "Unexpected type cast in parameter position.", UnsupportedImportTypeArgument: "Argument in a type import must be a string literal", UnsupportedParameterPropertyKind: "A parameter property may not be declared using a binding pattern.", UnsupportedSignatureParameterKind: "Name in a signature must be an Identifier, ObjectPattern or ArrayPattern, instead got %0" }); function keywordTypeFromName(value) { switch (value) { case "any": return "TSAnyKeyword"; case "boolean": return "TSBooleanKeyword"; case "bigint": return "TSBigIntKeyword"; case "never": return "TSNeverKeyword"; case "number": return "TSNumberKeyword"; case "object": return "TSObjectKeyword"; case "string": return "TSStringKeyword"; case "symbol": return "TSSymbolKeyword"; case "undefined": return "TSUndefinedKeyword"; case "unknown": return "TSUnknownKeyword"; default: return undefined; } } function tsIsAccessModifier(modifier) { return modifier === "private" || modifier === "public" || modifier === "protected"; } var typescript = (superClass => class extends superClass { getScopeHandler() { return TypeScriptScopeHandler; } tsIsIdentifier() { return this.match(types.name); } tsNextTokenCanFollowModifier() { this.next(); return (this.match(types.bracketL) || this.match(types.braceL) || this.match(types.star) || this.match(types.ellipsis) || this.match(types.hash) || this.isLiteralPropertyName()) && !this.hasPrecedingLineBreak(); } tsParseModifier(allowedModifiers) { if (!this.match(types.name)) { return undefined; } const modifier = this.state.value; if (allowedModifiers.indexOf(modifier) !== -1 && this.tsTryParse(this.tsNextTokenCanFollowModifier.bind(this))) { return modifier; } return undefined; } tsParseModifiers(modified, allowedModifiers, disallowedModifiers, errorTemplate) { for (;;) { const startPos = this.state.start; const modifier = this.tsParseModifier(allowedModifiers.concat(disallowedModifiers != null ? disallowedModifiers : [])); if (!modifier) break; if (tsIsAccessModifier(modifier)) { if (modified.accessibility) { this.raise(startPos, TSErrors.DuplicateAccessibilityModifier); } else { modified.accessibility = modifier; } } else { if (Object.hasOwnProperty.call(modified, modifier)) { this.raise(startPos, TSErrors.DuplicateModifier, modifier); } modified[modifier] = true; } if (disallowedModifiers != null && disallowedModifiers.includes(modifier)) { this.raise(startPos, errorTemplate, modifier); } } } tsIsListTerminator(kind) { switch (kind) { case "EnumMembers": case "TypeMembers": return this.match(types.braceR); case "HeritageClauseElement": return this.match(types.braceL); case "TupleElementTypes": return this.match(types.bracketR); case "TypeParametersOrArguments": return this.isRelational(">"); } throw new Error("Unreachable"); } tsParseList(kind, parseElement) { const result = []; while (!this.tsIsListTerminator(kind)) { result.push(parseElement()); } return result; } tsParseDelimitedList(kind, parseElement) { return nonNull(this.tsParseDelimitedListWorker(kind, parseElement, true)); } tsParseDelimitedListWorker(kind, parseElement, expectSuccess) { const result = []; for (;;) { if (this.tsIsListTerminator(kind)) { break; } const element = parseElement(); if (element == null) { return undefined; } result.push(element); if (this.eat(types.comma)) { continue; } if (this.tsIsListTerminator(kind)) { break; } if (expectSuccess) { this.expect(types.comma); } return undefined; } return result; } tsParseBracketedList(kind, parseElement, bracket, skipFirstToken) { if (!skipFirstToken) { if (bracket) { this.expect(types.bracketL); } else { this.expectRelational("<"); } } const result = this.tsParseDelimitedList(kind, parseElement); if (bracket) { this.expect(types.bracketR); } else { this.expectRelational(">"); } return result; } tsParseImportType() { const node = this.startNode(); this.expect(types._import); this.expect(types.parenL); if (!this.match(types.string)) { this.raise(this.state.start, TSErrors.UnsupportedImportTypeArgument); } node.argument = this.parseExprAtom(); this.expect(types.parenR); if (this.eat(types.dot)) { node.qualifier = this.tsParseEntityName(true); } if (this.isRelational("<")) { node.typeParameters = this.tsParseTypeArguments(); } return this.finishNode(node, "TSImportType"); } tsParseEntityName(allowReservedWords) { let entity = this.parseIdentifier(); while (this.eat(types.dot)) { const node = this.startNodeAtNode(entity); node.left = entity; node.right = this.parseIdentifier(allowReservedWords); entity = this.finishNode(node, "TSQualifiedName"); } return entity; } tsParseTypeReference() { const node = this.startNode(); node.typeName = this.tsParseEntityName(false); if (!this.hasPrecedingLineBreak() && this.isRelational("<")) { node.typeParameters = this.tsParseTypeArguments(); } return this.finishNode(node, "TSTypeReference"); } tsParseThisTypePredicate(lhs) { this.next(); const node = this.startNodeAtNode(lhs); node.parameterName = lhs; node.typeAnnotation = this.tsParseTypeAnnotation(false); node.asserts = false; return this.finishNode(node, "TSTypePredicate"); } tsParseThisTypeNode() { const node = this.startNode(); this.next(); return this.finishNode(node, "TSThisType"); } tsParseTypeQuery() { const node = this.startNode(); this.expect(types._typeof); if (this.match(types._import)) { node.exprName = this.tsParseImportType(); } else { node.exprName = this.tsParseEntityName(true); } return this.finishNode(node, "TSTypeQuery"); } tsParseTypeParameter() { const node = this.startNode(); node.name = this.parseIdentifierName(node.start); node.constraint = this.tsEatThenParseType(types._extends); node.default = this.tsEatThenParseType(types.eq); return this.finishNode(node, "TSTypeParameter"); } tsTryParseTypeParameters() { if (this.isRelational("<")) { return this.tsParseTypeParameters(); } } tsParseTypeParameters() { const node = this.startNode(); if (this.isRelational("<") || this.match(types.jsxTagStart)) { this.next(); } else { this.unexpected(); } node.params = this.tsParseBracketedList("TypeParametersOrArguments", this.tsParseTypeParameter.bind(this), false, true); if (node.params.length === 0) { this.raise(node.start, TSErrors.EmptyTypeParameters); } return this.finishNode(node, "TSTypeParameterDeclaration"); } tsTryNextParseConstantContext() { if (this.lookahead().type === types._const) { this.next(); return this.tsParseTypeReference(); } return null; } tsFillSignature(returnToken, signature) { const returnTokenRequired = returnToken === types.arrow; signature.typeParameters = this.tsTryParseTypeParameters(); this.expect(types.parenL); signature.parameters = this.tsParseBindingListForSignature(); if (returnTokenRequired) { signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken); } else if (this.match(returnToken)) { signature.typeAnnotation = this.tsParseTypeOrTypePredicateAnnotation(returnToken); } } tsParseBindingListForSignature() { return this.parseBindingList(types.parenR, 41).map(pattern => { if (pattern.type !== "Identifier" && pattern.type !== "RestElement" && pattern.type !== "ObjectPattern" && pattern.type !== "ArrayPattern") { this.raise(pattern.start, TSErrors.UnsupportedSignatureParameterKind, pattern.type); } return pattern; }); } tsParseTypeMemberSemicolon() { if (!this.eat(types.comma)) { this.semicolon(); } } tsParseSignatureMember(kind, node) { this.tsFillSignature(types.colon, node); this.tsParseTypeMemberSemicolon(); return this.finishNode(node, kind); } tsIsUnambiguouslyIndexSignature() { this.next(); return this.eat(types.name) && this.match(types.colon); } tsTryParseIndexSignature(node) { if (!(this.match(types.bracketL) && this.tsLookAhead(this.tsIsUnambiguouslyIndexSignature.bind(this)))) { return undefined; } this.expect(types.bracketL); const id = this.parseIdentifier(); id.typeAnnotation = this.tsParseTypeAnnotation(); this.resetEndLocation(id); this.expect(types.bracketR); node.parameters = [id]; const type = this.tsTryParseTypeAnnotation(); if (type) node.typeAnnotation = type; this.tsParseTypeMemberSemicolon(); return this.finishNode(node, "TSIndexSignature"); } tsParsePropertyOrMethodSignature(node, readonly) { if (this.eat(types.question)) node.optional = true; const nodeAny = node; if (this.match(types.parenL) || this.isRelational("<")) { if (readonly) { this.raise(node.start, TSErrors.ReadonlyForMethodSignature); } const method = nodeAny; this.tsFillSignature(types.colon, method); this.tsParseTypeMemberSemicolon(); return this.finishNode(method, "TSMethodSignature"); } else { const property = nodeAny; if (readonly) property.readonly = true; const type = this.tsTryParseTypeAnnotation(); if (type) property.typeAnnotation = type; this.tsParseTypeMemberSemicolon(); return this.finishNode(property, "TSPropertySignature"); } } tsParseTypeMember() { const node = this.startNode(); if (this.match(types.parenL) || this.isRelational("<")) { return this.tsParseSignatureMember("TSCallSignatureDeclaration", node); } if (this.match(types._new)) { const id = this.startNode(); this.next(); if (this.match(types.parenL) || this.isRelational("<")) { return this.tsParseSignatureMember("TSConstructSignatureDeclaration", node); } else { node.key = this.createIdentifier(id, "new"); return this.tsParsePropertyOrMethodSignature(node, false); } } this.tsParseModifiers(node, ["readonly"], ["declare", "abstract", "private", "protected", "public", "static"], TSErrors.InvalidModifierOnTypeMember); const idx = this.tsTryParseIndexSignature(node); if (idx) { return idx; } this.parsePropertyName(node, false); return this.tsParsePropertyOrMethodSignature(node, !!node.readonly); } tsParseTypeLiteral() { const node = this.startNode(); node.members = this.tsParseObjectTypeMembers(); return this.finishNode(node, "TSTypeLiteral"); } tsParseObjectTypeMembers() { this.expect(types.braceL); const members = this.tsParseList("TypeMembers", this.tsParseTypeMember.bind(this)); this.expect(types.braceR); return members; } tsIsStartOfMappedType() { this.next(); if (this.eat(types.plusMin)) { return this.isContextual("readonly"); } if (this.isContextual("readonly")) { this.next(); } if (!this.match(types.bracketL)) { return false; } this.next(); if (!this.tsIsIdentifier()) { return false; } this.next(); return this.match(types._in); } tsParseMappedTypeParameter() { const node = this.startNode(); node.name = this.parseIdentifierName(node.start); node.constraint = this.tsExpectThenParseType(types._in); return this.finishNode(node, "TSTypeParameter"); } tsParseMappedType() { const node = this.startNode(); this.expect(types.braceL); if (this.match(types.plusMin)) { node.readonly = this.state.value; this.next(); this.expectContextual("readonly"); } else if (this.eatContextual("readonly")) { node.readonly = true; } this.expect(types.bracketL); node.typeParameter = this.tsParseMappedTypeParameter(); node.nameType = this.eatContextual("as") ? this.tsParseType() : null; this.expect(types.bracketR); if (this.match(types.plusMin)) { node.optional = this.state.value; this.next(); this.expect(types.question); } else if (this.eat(types.question)) { node.optional = true; } node.typeAnnotation = this.tsTryParseType(); this.semicolon(); this.expect(types.braceR); return this.finishNode(node, "TSMappedType"); } tsParseTupleType() { const node = this.startNode(); node.elementTypes = this.tsParseBracketedList("TupleElementTypes", this.tsParseTupleElementType.bind(this), true, false); let seenOptionalElement = false; let labeledElements = null; node.elementTypes.forEach(elementNode => { var _labeledElements; let { type } = elementNode; if (seenOptionalElement && type !== "TSRestType" && type !== "TSOptionalType" && !(type === "TSNamedTupleMember" && elementNode.optional)) { this.raise(elementNode.start, TSErrors.OptionalTypeBeforeRequired); } seenOptionalElement = seenOptionalElement || type === "TSNamedTupleMember" && elementNode.optional || type === "TSOptionalType"; if (type === "TSRestType") { elementNode = elementNode.typeAnnotation; type = elementNode.type; } const isLabeled = type === "TSNamedTupleMember"; labeledElements = (_labeledElements = labeledElements) != null ? _labeledElements : isLabeled; if (labeledElements !== isLabeled) { this.raise(elementNode.start, TSErrors.MixedLabeledAndUnlabeledElements); } }); return this.finishNode(node, "TSTupleType"); } tsParseTupleElementType() { const { start: startPos, startLoc } = this.state; const rest = this.eat(types.ellipsis); let type = this.tsParseType(); const optional = this.eat(types.question); const labeled = this.eat(types.colon); if (labeled) { const labeledNode = this.startNodeAtNode(type); labeledNode.optional = optional; if (type.type === "TSTypeReference" && !type.typeParameters && type.typeName.type === "Identifier") { labeledNode.label = type.typeName; } else { this.raise(type.start, TSErrors.InvalidTupleMemberLabel); labeledNode.label = type; } labeledNode.elementType = this.tsParseType(); type = this.finishNode(labeledNode, "TSNamedTupleMember"); } else if (optional) { const optionalTypeNode = this.startNodeAtNode(type); optionalTypeNode.typeAnnotation = type; type = this.finishNode(optionalTypeNode, "TSOptionalType"); } if (rest) { const restNode = this.startNodeAt(startPos, startLoc); restNode.typeAnnotation = type; type = this.finishNode(restNode, "TSRestType"); } return type; } tsParseParenthesizedType() { const node = this.startNode(); this.expect(types.parenL); node.typeAnnotation = this.tsParseType(); this.expect(types.parenR); return this.finishNode(node, "TSParenthesizedType"); } tsParseFunctionOrConstructorType(type, abstract) { const node = this.startNode(); if (type === "TSConstructorType") { node.abstract = !!abstract; if (abstract) this.next(); this.next(); } this.tsFillSignature(types.arrow, node); return this.finishNode(node, type); } tsParseLiteralTypeNode() { const node = this.startNode(); node.literal = (() => { switch (this.state.type) { case types.num: case types.bigint: case types.string: case types._true: case types._false: return this.parseExprAtom(); default: throw this.unexpected(); } })(); return this.finishNode(node, "TSLiteralType"); } tsParseTemplateLiteralType() { const node = this.startNode(); node.literal = this.parseTemplate(false); return this.finishNode(node, "TSLiteralType"); } parseTemplateSubstitution() { if (this.state.inType) return this.tsParseType(); return super.parseTemplateSubstitution(); } tsParseThisTypeOrThisTypePredicate() { const thisKeyword = this.tsParseThisTypeNode(); if (this.isContextual("is") && !this.hasPrecedingLineBreak()) { return this.tsParseThisTypePredicate(thisKeyword); } else { return thisKeyword; } } tsParseNonArrayType() { switch (this.state.type) { case types.name: case types._void: case types._null: { const type = this.match(types._void) ? "TSVoidKeyword" : this.match(types._null) ? "TSNullKeyword" : keywordTypeFromName(this.state.value); if (type !== undefined && this.lookaheadCharCode() !== 46) { const node = this.startNode(); this.next(); return this.finishNode(node, type); } return this.tsParseTypeReference(); } case types.string: case types.num: case types.bigint: case types._true: case types._false: return this.tsParseLiteralTypeNode(); case types.plusMin: if (this.state.value === "-") { const node = this.startNode(); const nextToken = this.lookahead(); if (nextToken.type !== types.num && nextToken.type !== types.bigint) { throw this.unexpected(); } node.literal = this.parseMaybeUnary(); return this.finishNode(node, "TSLiteralType"); } break; case types._this: return this.tsParseThisTypeOrThisTypePredicate(); case types._typeof: return this.tsParseTypeQuery(); case types._import: return this.tsParseImportType(); case types.braceL: return this.tsLookAhead(this.tsIsStartOfMappedType.bind(this)) ? this.tsParseMappedType() : this.tsParseTypeLiteral(); case types.bracketL: return this.tsParseTupleType(); case types.parenL: return this.tsParseParenthesizedType(); case types.backQuote: return this.tsParseTemplateLiteralType(); } throw this.unexpected(); } tsParseArrayTypeOrHigher() { let type = this.tsParseNonArrayType(); while (!this.hasPrecedingLineBreak() && this.eat(types.bracketL)) { if (this.match(types.bracketR)) { const node = this.startNodeAtNode(type); node.elementType = type; this.expect(types.bracketR); type = this.finishNode(node, "TSArrayType"); } else { const node = this.startNodeAtNode(type); node.objectType = type; node.indexType = this.tsParseType(); this.expect(types.bracketR); type = this.finishNode(node, "TSIndexedAccessType"); } } return type; } tsParseTypeOperator(operator) { const node = this.startNode(); this.expectContextual(operator); node.operator = operator; node.typeAnnotation = this.tsParseTypeOperatorOrHigher(); if (operator === "readonly") { this.tsCheckTypeAnnotationForReadOnly(node); } return this.finishNode(node, "TSTypeOperator"); } tsCheckTypeAnnotationForReadOnly(node) { switch (node.typeAnnotation.type) { case "TSTupleType": case "TSArrayType": return; default: this.raise(node.start, TSErrors.UnexpectedReadonly); } } tsParseInferType() { const node = this.startNode(); this.expectContextual("infer"); const typeParameter = this.startNode(); typeParameter.name = this.parseIdentifierName(typeParameter.start); node.typeParameter = this.finishNode(typeParameter, "TSTypeParameter"); return this.finishNode(node, "TSInferType"); } tsParseTypeOperatorOrHigher() { const operator = ["keyof", "unique", "readonly"].find(kw => this.isContextual(kw)); return operator ? this.tsParseTypeOperator(operator) : this.isContextual("infer") ? this.tsParseInferType() : this.tsParseArrayTypeOrHigher(); } tsParseUnionOrIntersectionType(kind, parseConstituentType, operator) { const node = this.startNode(); const hasLeadingOperator = this.eat(operator); const types = []; do { types.push(parseConstituentType()); } while (this.eat(operator)); if (types.length === 1 && !hasLeadingOperator) { return types[0]; } node.types = types; return this.finishNode(node, kind); } tsParseIntersectionTypeOrHigher() { return this.tsParseUnionOrIntersectionType("TSIntersectionType", this.tsParseTypeOperatorOrHigher.bind(this), types.bitwiseAND); } tsParseUnionTypeOrHigher() { return this.tsParseUnionOrIntersectionType("TSUnionType", this.tsParseIntersectionTypeOrHigher.bind(this), types.bitwiseOR); } tsIsStartOfFunctionType() { if (this.isRelational("<")) { return true; } return this.match(types.parenL) && this.tsLookAhead(this.tsIsUnambiguouslyStartOfFunctionType.bind(this)); } tsSkipParameterStart() { if (this.match(types.name) || this.match(types._this)) { this.next(); return true; } if (this.match(types.braceL)) { let braceStackCounter = 1; this.next(); while (braceStackCounter > 0) { if (this.match(types.braceL)) { ++braceStackCounter; } else if (this.match(types.braceR)) { --braceStackCounter; } this.next(); } return true; } if (this.match(types.bracketL)) { let braceStackCounter = 1; this.next(); while (braceStackCounter > 0) { if (this.match(types.bracketL)) { ++braceStackCounter; } else if (this.match(types.bracketR)) { --braceStackCounter; } this.next(); } return true; } return false; } tsIsUnambiguouslyStartOfFunctionType() { this.next(); if (this.match(types.parenR) || this.match(types.ellipsis)) { return true; } if (this.tsSkipParameterStart()) { if (this.match(types.colon) || this.match(types.comma) || this.match(types.question) || this.match(types.eq)) { return true; } if (this.match(types.parenR)) { this.next(); if (this.match(types.arrow)) { return true; } } } return false; } tsParseTypeOrTypePredicateAnnotation(returnToken) { return this.tsInType(() => { const t = this.startNode(); this.expect(returnToken); const node = this.startNode(); const asserts = !!this.tsTryParse(this.tsParseTypePredicateAsserts.bind(this)); if (asserts && this.match(types._this)) { let thisTypePredicate = this.tsParseThisTypeOrThisTypePredicate(); if (thisTypePredicate.type === "TSThisType") { node.parameterName = thisTypePredicate; node.asserts = true; thisTypePredicate = this.finishNode(node, "TSTypePredicate"); } else { this.resetStartLocationFromNode(thisTypePredicate, node); thisTypePredicate.asserts = true; } t.typeAnnotation = thisTypePredicate; return this.finishNode(t, "TSTypeAnnotation"); } const typePredicateVariable = this.tsIsIdentifier() && this.tsTryParse(this.tsParseTypePredicatePrefix.bind(this)); if (!typePredicateVariable) { if (!asserts) { return this.tsParseTypeAnnotation(false, t); } node.parameterName = this.parseIdentifier(); node.asserts = asserts; t.typeAnnotation = this.finishNode(node, "TSTypePredicate"); return this.finishNode(t, "TSTypeAnnotation"); } const type = this.tsParseTypeAnnotation(false); node.parameterName = typePredicateVariable; node.typeAnnotation = type; node.asserts = asserts; t.typeAnnotation = this.finishNode(node, "TSTypePredicate"); return this.finishNode(t, "TSTypeAnnotation"); }); } tsTryParseTypeOrTypePredicateAnnotation() { return this.match(types.colon) ? this.tsParseTypeOrTypePredicateAnnotation(types.colon) : undefined; } tsTryParseTypeAnnotation() { return this.match(types.colon) ? this.tsParseTypeAnnotation() : undefined; } tsTryParseType() { return this.tsEatThenParseType(types.colon); } tsParseTypePredicatePrefix() { const id = this.parseIdentifier(); if (this.isContextual("is") && !this.hasPrecedingLineBreak()) { this.next(); return id; } } tsParseTypePredicateAsserts() { if (!this.match(types.name) || this.state.value !== "asserts" || this.hasPrecedingLineBreak()) { return false; } const containsEsc = this.state.containsEsc; this.next(); if (!this.match(types.name) && !this.match(types._this)) { return false; } if (containsEsc) { this.raise(this.state.lastTokStart, ErrorMessages.InvalidEscapedReservedWord, "asserts"); } return true; } tsParseTypeAnnotation(eatColon = true, t = this.startNode()) { this.tsInType(() => { if (eatColon) this.expect(types.colon); t.typeAnnotation = this.tsParseType(); }); return this.finishNode(t, "TSTypeAnnotation"); } tsParseType() { assert(this.state.inType); const type = this.tsParseNonConditionalType(); if (this.hasPrecedingLineBreak() || !this.eat(types._extends)) { return type; } const node = this.startNodeAtNode(type); node.checkType = type; node.extendsType = this.tsParseNonConditionalType(); this.expect(types.question); node.trueType = this.tsParseType(); this.expect(types.colon); node.falseType = this.tsParseType(); return this.finishNode(node, "TSConditionalType"); } isAbstractConstructorSignature() { return this.isContextual("abstract") && this.lookahead().type === types._new; } tsParseNonConditionalType() { if (this.tsIsStartOfFunctionType()) { return this.tsParseFunctionOrConstructorType("TSFunctionType"); } if (this.match(types._new)) { return this.tsParseFunctionOrConstructorType("TSConstructorType"); } else if (this.isAbstractConstructorSignature()) { return this.tsParseFunctionOrConstructorType("TSConstructorType", true); } return this.tsParseUnionTypeOrHigher(); } tsParseTypeAssertion() { const node = this.startNode(); const _const = this.tsTryNextParseConstantContext(); node.typeAnnotation = _const || this.tsNextThenParseType(); this.expectRelational(">"); node.expression = this.parseMaybeUnary(); return this.finishNode(node, "TSTypeAssertion"); } tsParseHeritageClause(descriptor) { const originalStart = this.state.start; const delimitedList = this.tsParseDelimitedList("HeritageClauseElement", this.tsParseExpressionWithTypeArguments.bind(this)); if (!delimitedList.length) { this.raise(originalStart, TSErrors.EmptyHeritageClauseType, descriptor); } return delimitedList; } tsParseExpressionWithTypeArguments() { const node = this.startNode(); node.expression = this.tsParseEntityName(false); if (this.isRelational("<")) { node.typeParameters = this.tsParseTypeArguments(); } return this.finishNode(node, "TSExpressionWithTypeArguments"); } tsParseInterfaceDeclaration(node) { node.id = this.parseIdentifier(); this.checkLVal(node.id, "typescript interface declaration", BIND_TS_INTERFACE); node.typeParameters = this.tsTryParseTypeParameters(); if (this.eat(types._extends)) { node.extends = this.tsParseHeritageClause("extends"); } const body = this.startNode(); body.body = this.tsInType(this.tsParseObjectTypeMembers.bind(this)); node.body = this.finishNode(body, "TSInterfaceBody"); return this.finishNode(node, "TSInterfaceDeclaration"); } tsParseTypeAliasDeclaration(node) { node.id = this.parseIdentifier(); this.checkLVal(node.id, "typescript type alias", BIND_TS_TYPE); node.typeParameters = this.tsTryParseTypeParameters(); node.typeAnnotation = this.tsInType(() => { this.expect(types.eq); if (this.isContextual("intrinsic") && this.lookahead().type !== types.dot) { const node = this.startNode(); this.next(); return this.finishNode(node, "TSIntrinsicKeyword"); } return this.tsParseType(); }); this.semicolon(); return this.finishNode(node, "TSTypeAliasDeclaration"); } tsInNoContext(cb) { const oldContext = this.state.context; this.state.context = [oldContext[0]]; try { return cb(); } finally { this.state.context = oldContext; } } tsInType(cb) { const oldInType = this.state.inType; this.state.inType = true; try { return cb(); } finally { this.state.inType = oldInType; } } tsEatThenParseType(token) { return !this.match(token) ? undefined : this.tsNextThenParseType(); } tsExpectThenParseType(token) { return this.tsDoThenParseType(() => this.expect(token)); } tsNextThenParseType() { return this.tsDoThenParseType(() => this.next()); } tsDoThenParseType(cb) { return this.tsInType(() => { cb(); return this.tsParseType(); }); } tsParseEnumMember() { const node = this.startNode(); node.id = this.match(types.string) ? this.parseExprAtom() : this.parseIdentifier(true); if (this.eat(types.eq)) { node.initializer = this.parseMaybeAssignAllowIn(); } return this.finishNode(node, "TSEnumMember"); } tsParseEnumDeclaration(node, isConst) { if (isConst) node.const = true; node.id = this.parseIdentifier(); this.checkLVal(node.id, "typescript enum declaration", isConst ? BIND_TS_CONST_ENUM : BIND_TS_ENUM); this.expect(types.braceL); node.members = this.tsParseDelimitedList("EnumMembers", this.tsParseEnumMember.bind(this)); this.expect(types.braceR); return this.finishNode(node, "TSEnumDeclaration"); } tsParseModuleBlock() { const node = this.startNode(); this.scope.enter(SCOPE_OTHER); this.expect(types.braceL); this.parseBlockOrModuleBlockBody(node.body = [], undefined, true, types.braceR); this.scope.exit(); return this.finishNode(node, "TSModuleBlock"); } tsParseModuleOrNamespaceDeclaration(node, nested = false) { node.id = this.parseIdentifier(); if (!nested) { this.checkLVal(node.id, "module or namespace declaration", BIND_TS_NAMESPACE); } if (this.eat(types.dot)) { const inner = this.startNode(); this.tsParseModuleOrNamespaceDeclaration(inner, true); node.body = inner; } else { this.scope.enter(SCOPE_TS_MODULE); this.prodParam.enter(PARAM); node.body = this.tsParseModuleBlock(); this.prodParam.exit(); this.scope.exit(); } return this.finishNode(node, "TSModuleDeclaration"); } tsParseAmbientExternalModuleDeclaration(node) { if (this.isContextual("global")) { node.global = true; node.id = this.parseIdentifier(); } else if (this.match(types.string)) { node.id = this.parseExprAtom(); } else { this.unexpected(); } if (this.match(types.braceL)) { this.scope.enter(SCOPE_TS_MODULE); this.prodParam.enter(PARAM); node.body = this.tsParseModuleBlock(); this.prodParam.exit(); this.scope.exit(); } else { this.semicolon(); } return this.finishNode(node, "TSModuleDeclaration"); } tsParseImportEqualsDeclaration(node, isExport) { node.isExport = isExport || false; node.id = this.parseIdentifier(); this.checkLVal(node.id, "import equals declaration", BIND_LEXICAL); this.expect(types.eq); node.moduleReference = this.tsParseModuleReference(); this.semicolon(); return this.finishNode(node, "TSImportEqualsDeclaration"); } tsIsExternalModuleReference() { return this.isContextual("require") && this.lookaheadCharCode() === 40; } tsParseModuleReference() { return this.tsIsExternalModuleReference() ? this.tsParseExternalModuleReference() : this.tsParseEntityName(false); } tsParseExternalModuleReference() { const node = this.startNode(); this.expectContextual("require"); this.expect(types.parenL); if (!this.match(types.string)) { throw this.unexpected(); } node.expression = this.parseExprAtom(); this.expect(types.parenR); return this.finishNode(node, "TSExternalModuleReference"); } tsLookAhead(f) { const state = this.state.clone(); const res = f(); this.state = state; return res; } tsTryParseAndCatch(f) { const result = this.tryParse(abort => f() || abort()); if (result.aborted || !result.node) return undefined; if (result.error) this.state = result.failState; return result.node; } tsTryParse(f) { const state = this.state.clone(); const result = f(); if (result !== undefined && result !== false) { return result; } else { this.state = state; return undefined; } } tsTryParseDeclare(nany) { if (this.isLineTerminator()) { return; } let starttype = this.state.type; let kind; if (this.isContextual("let")) { starttype = types._var; kind = "let"; } return this.tsInDeclareContext(() => { switch (starttype) { case types._function: nany.declare = true; return this.parseFunctionStatement(nany, false, true); case types._class: nany.declare = true; return this.parseClass(nany, true, false); case types._const: if (this.match(types._const) && this.isLookaheadContextual("enum")) { this.expect(types._const); this.expectContextual("enum"); return this.tsParseEnumDeclaration(nany, true); } case types._var: kind = kind || this.state.value; return this.parseVarStatement(nany, kind); case types.name: { const value = this.state.value; if (value === "global") { return this.tsParseAmbientExternalModuleDeclaration(nany); } else { return this.tsParseDeclaration(nany, value, true); } } } }); } tsTryParseExportDeclaration() { return this.tsParseDeclaration(this.startNode(), this.state.value, true); } tsParseExpressionStatement(node, expr) { switch (expr.name) { case "declare": { const declaration = this.tsTryParseDeclare(node); if (declaration) { declaration.declare = true; return declaration; } break; } case "global": if (this.match(types.braceL)) { this.scope.enter(SCOPE_TS_MODULE); this.prodParam.enter(PARAM); const mod = node; mod.global = true; mod.id = expr; mod.body = this.tsParseModuleBlock(); this.scope.exit(); this.prodParam.exit(); return this.finishNode(mod, "TSModuleDeclaration"); } break; default: return this.tsParseDeclaration(node, expr.name, false); } } tsParseDeclaration(node, value, next) { switch (value) { case "abstract": if (this.tsCheckLineTerminator(next) && (this.match(types._class) || this.match(types.name))) { return this.tsParseAbstractDeclaration(node); } break; case "enum": if (next || this.match(types.name)) { if (next) this.next(); return this.tsParseEnumDeclaration(node, false); } break; case "interface": if (this.tsCheckLineTerminator(next) && this.match(types.name)) { return this.tsParseInterfaceDeclaration(node); } break; case "module": if (this.tsCheckLineTerminator(next)) { if (this.match(types.string)) { return this.tsParseAmbientExternalModuleDeclaration(node); } else if (this.match(types.name)) { return this.tsParseModuleOrNamespaceDeclaration(node); } } break; case "namespace": if (this.tsCheckLineTerminator(next) && this.match(types.name)) { return this.tsParseModuleOrNamespaceDeclaration(node); } break; case "type": if (this.tsCheckLineTerminator(next) && this.match(types.name)) { return this.tsParseTypeAliasDeclaration(node); } break; } } tsCheckLineTerminator(next) { if (next) { if (this.hasFollowingLineBreak()) return false; this.next(); return true; } return !this.isLineTerminator(); } tsTryParseGenericAsyncArrowFunction(startPos, startLoc) { if (!this.isRelational("<")) { return undefined; } const oldMaybeInArrowParameters = this.state.maybeInArrowParameters; this.state.maybeInArrowParameters = true; const res = this.tsTryParseAndCatch(() => { const node = this.startNodeAt(startPos, startLoc); node.typeParameters = this.tsParseTypeParameters(); super.parseFunctionParams(node); node.returnType = this.tsTryParseTypeOrTypePredicateAnnotation(); this.expect(types.arrow); return node; }); this.state.maybeInArrowParameters = oldMaybeInArrowParameters; if (!res) { return undefined; } return this.parseArrowExpression(res, null, true); } tsParseTypeArguments() { const node = this.startNode(); node.params = this.tsInType(() => this.tsInNoContext(() => { this.expectRelational("<"); return this.tsParseDelimitedList("TypeParametersOrArguments", this.tsParseType.bind(this)); })); if (node.params.length === 0) { this.raise(node.start, TSErrors.EmptyTypeArguments); } this.state.exprAllowed = false; this.expectRelational(">"); return this.finishNode(node, "TSTypeParameterInstantiation"); } tsIsDeclarationStart() { if (this.match(types.name)) { switch (this.state.value) { case "abstract": case "declare": case "enum": case "interface": case "module": case "namespace": case "type": return true; } } return false; } isExportDefaultSpecifier() { if (this.tsIsDeclarationStart()) return false; return super.isExportDefaultSpecifier(); } parseAssignableListItem(allowModifiers, decorators) { const startPos = this.state.start; const startLoc = this.state.startLoc; let accessibility; let readonly = false; if (allowModifiers !== undefined) { accessibility = this.parseAccessModifier(); readonly = !!this.tsParseModifier(["readonly"]); if (allowModifiers === false && (accessibility || readonly)) { this.raise(startPos, TSErrors.UnexpectedParameterModifier); } } const left = this.parseMaybeDefault(); this.parseAssignableListItemTypes(left); const elt = this.parseMaybeDefault(left.start, left.loc.start, left); if (accessibility || readonly) { const pp = this.startNodeAt(startPos, startLoc); if (decorators.length) { pp.decorators = decorators; } if (accessibility) pp.accessibility = accessibility; if (readonly) pp.readonly = readonly; if (elt.type !== "Identifier" && elt.type !== "AssignmentPattern") { this.raise(pp.start, TSErrors.UnsupportedParameterPropertyKind); } pp.parameter = elt; return this.finishNode(pp, "TSParameterProperty"); } if (decorators.length) { left.decorators = decorators; } return elt; } parseFunctionBodyAndFinish(node, type, isMethod = false) { if (this.match(types.colon)) { node.returnType = this.tsParseTypeOrTypePredicateAnnotation(types.colon); } const bodilessType = type === "FunctionDeclaration" ? "TSDeclareFunction" : type === "ClassMethod" ? "TSDeclareMethod" : undefined; if (bodilessType && !this.match(types.braceL) && this.isLineTerminator()) { this.finishNode(node, bodilessType); return; } if (bodilessType === "TSDeclareFunction" && this.state.isDeclareContext) { this.raise(node.start, TSErrors.DeclareFunctionHasImplementation); if (node.declare) { super.parseFunctionBodyAndFinish(node, bodilessType, isMethod); return; } } super.parseFunctionBodyAndFinish(node, type, isMethod); } registerFunctionStatementId(node) { if (!node.body && node.id) { this.checkLVal(node.id, "function name", BIND_TS_AMBIENT); } else { super.registerFunctionStatementId(...arguments); } } tsCheckForInvalidTypeCasts(items) { items.forEach(node => { if ((node == null ? void 0 : node.type) === "TSTypeCastExpression") { this.raise(node.typeAnnotation.start, TSErrors.UnexpectedTypeAnnotation); } }); } toReferencedList(exprList, isInParens) { this.tsCheckForInvalidTypeCasts(exprList); return exprList; } parseArrayLike(...args) { const node = super.parseArrayLike(...args); if (node.type === "ArrayExpression") { this.tsCheckForInvalidTypeCasts(node.elements); } return node; } parseSubscript(base, startPos, startLoc, noCalls, state) { if (!this.hasPrecedingLineBreak() && this.match(types.bang)) { this.state.exprAllowed = false; this.next(); const nonNullExpression = this.startNodeAt(startPos, startLoc); nonNullExpression.expression = base; return this.finishNode(nonNullExpression, "TSNonNullExpression"); } if (this.isRelational("<")) { const result = this.tsTryParseAndCatch(() => { if (!noCalls && this.atPossibleAsyncArrow(base)) { const asyncArrowFn = this.tsTryParseGenericAsyncArrowFunction(startPos, startLoc); if (asyncArrowFn) { return asyncArrowFn; } } const node = this.startNodeAt(startPos, startLoc); node.callee = base; const typeArguments = this.tsParseTypeArguments(); if (typeArguments) { if (!noCalls && this.eat(types.parenL)) { node.arguments = this.parseCallExpressionArguments(types.parenR, false); this.tsCheckForInvalidTypeCasts(node.arguments); node.typeParameters = typeArguments; if (state.optionalChainMember) { node.optional = false; } return this.finishCallExpression(node, state.optionalChainMember); } else if (this.match(types.backQuote)) { const result = this.parseTaggedTemplateExpression(base, startPos, startLoc, state); result.typeParameters = typeArguments; return result; } } this.unexpected(); }); if (result) return result; } return super.parseSubscript(base, startPos, startLoc, noCalls, state); } parseNewArguments(node) { if (this.isRelational("<")) { const typeParameters = this.tsTryParseAndCatch(() => { const args = this.tsParseTypeArguments(); if (!this.match(types.parenL)) this.unexpected(); return args; }); if (typeParameters) { node.typeParameters = typeParameters; } } super.parseNewArguments(node); } parseExprOp(left, leftStartPos, leftStartLoc, minPrec) { if (nonNull(types._in.binop) > minPrec && !this.hasPrecedingLineBreak() && this.isContextual("as")) { const node = this.startNodeAt(leftStartPos, leftStartLoc); node.expression = left; const _const = this.tsTryNextParseConstantContext(); if (_const) { node.typeAnnotation = _const; } else { node.typeAnnotation = this.tsNextThenParseType(); } this.finishNode(node, "TSAsExpression"); this.reScan_lt_gt(); return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec); } return super.parseExprOp(left, leftStartPos, leftStartLoc, minPrec); } checkReservedWord(word, startLoc, checkKeywords, isBinding) {} checkDuplicateExports() {} parseImport(node) { if (this.match(types.name) || this.match(types.star) || this.match(types.braceL)) { const ahead = this.lookahead(); if (this.match(types.name) && ahead.type === types.eq) { return this.tsParseImportEqualsDeclaration(node); } if (this.isContextual("type") && ahead.type !== types.comma && !(ahead.type === types.name && ahead.value === "from")) { node.importKind = "type"; this.next(); } } if (!node.importKind) { node.importKind = "value"; } const importNode = super.parseImport(node); if (importNode.importKind === "type" && importNode.specifiers.length > 1 && importNode.specifiers[0].type === "ImportDefaultSpecifier") { this.raise(importNode.start, "A type-only import can specify a default import or named bindings, but not both."); } return importNode; } parseExport(node) { if (this.match(types._import)) { this.expect(types._import); return this.tsParseImportEqualsDeclaration(node, true); } else if (this.eat(types.eq)) { const assign = node; assign.expression = this.parseExpression(); this.semicolon(); return this.finishNode(assign, "TSExportAssignment"); } else if (this.eatContextual("as")) { const decl = node; this.expectContextual("namespace"); decl.id = this.parseIdentifier(); this.semicolon(); return this.finishNode(decl, "TSNamespaceExportDeclaration"); } else { if (this.isContextual("type") && this.lookahead().type === types.braceL) { this.next(); node.exportKind = "type"; } else { node.exportKind = "value"; } return super.parseExport(node); } } isAbstractClass() { return this.isContextual("abstract") && this.lookahead().type === types._class; } parseExportDefaultExpression() { if (this.isAbstractClass()) { const cls = this.startNode(); this.next(); cls.abstract = true; this.parseClass(cls, true, true); return cls; } if (this.state.value === "interface") { const result = this.tsParseDeclaration(this.startNode(), this.state.value, true); if (result) return result; } return super.parseExportDefaultExpression(); } parseStatementContent(context, topLevel) { if (this.state.type === types._const) { const ahead = this.lookahead(); if (ahead.type === types.name && ahead.value === "enum") { const node = this.startNode(); this.expect(types._const); this.expectContextual("enum"); return this.tsParseEnumDeclaration(node, true); } } return super.parseStatementContent(context, topLevel); } parseAccessModifier() { return this.tsParseModifier(["public", "protected", "private"]); } parseClassMember(classBody, member, state) { this.tsParseModifiers(member, ["declare", "private", "public", "protected"]); const callParseClassMember = () => { super.parseClassMember(classBody, member, state); }; if (member.declare) { this.tsInDeclareContext(callParseClassMember); } else { callParseClassMember(); } } parseClassMemberWithIsStatic(classBody, member, state, isStatic) { this.tsParseModifiers(member, ["abstract", "readonly", "declare"]); const idx = this.tsTryParseIndexSignature(member); if (idx) { classBody.body.push(idx); if (member.abstract) { this.raise(member.start, TSErrors.IndexSignatureHasAbstract); } if (isStatic) { this.raise(member.start, TSErrors.IndexSignatureHasStatic); } if (member.accessibility) { this.raise(member.start, TSErrors.IndexSignatureHasAccessibility, member.accessibility); } if (member.declare) { this.raise(member.start, TSErrors.IndexSignatureHasDeclare); } return; } if (!this.state.inAbstractClass && member.abstract) { this.raise(member.start, TSErrors.NonAbstractClassHasAbstractMethod); } super.parseClassMemberWithIsStatic(classBody, member, state, isStatic); } parsePostMemberNameModifiers(methodOrProp) { const optional = this.eat(types.question); if (optional) methodOrProp.optional = true; if (methodOrProp.readonly && this.match(types.parenL)) { this.raise(methodOrProp.start, TSErrors.ClassMethodHasReadonly); } if (methodOrProp.declare && this.match(types.parenL)) { this.raise(methodOrProp.start, TSErrors.ClassMethodHasDeclare); } } parseExpressionStatement(node, expr) { const decl = expr.type === "Identifier" ? this.tsParseExpressionStatement(node, expr) : undefined; return decl || super.parseExpressionStatement(node, expr); } shouldParseExportDeclaration() { if (this.tsIsDeclarationStart()) return true; return super.shouldParseExportDeclaration(); } parseConditional(expr, startPos, startLoc, refNeedsArrowPos) { if (!refNeedsArrowPos || !this.match(types.question)) { return super.parseConditional(expr, startPos, startLoc, refNeedsArrowPos); } const result = this.tryParse(() => super.parseConditional(expr, startPos, startLoc)); if (!result.node) { refNeedsArrowPos.start = result.error.pos || this.state.start; return expr; } if (result.error) this.state = result.failState; return result.node; } parseParenItem(node, startPos, startLoc) { node = super.parseParenItem(node, startPos, startLoc); if (this.eat(types.question)) { node.optional = true; this.resetEndLocation(node); } if (this.match(types.colon)) { const typeCastNode = this.startNodeAt(startPos, startLoc); typeCastNode.expression = node; typeCastNode.typeAnnotation = this.tsParseTypeAnnotation(); return this.finishNode(typeCastNode, "TSTypeCastExpression"); } return node; } parseExportDeclaration(node) { const startPos = this.state.start; const startLoc = this.state.startLoc; const isDeclare = this.eatContextual("declare"); if (isDeclare && (this.isContextual("declare") || !this.shouldParseExportDeclaration())) { throw this.raise(this.state.start, TSErrors.ExpectedAmbientAfterExportDeclare); } let declaration; if (this.match(types.name)) { declaration = this.tsTryParseExportDeclaration(); } if (!declaration) { declaration = super.parseExportDeclaration(node); } if (declaration && (declaration.type === "TSInterfaceDeclaration" || declaration.type === "TSTypeAliasDeclaration" || isDeclare)) { node.exportKind = "type"; } if (declaration && isDeclare) { this.resetStartLocation(declaration, startPos, startLoc); declaration.declare = true; } return declaration; } parseClassId(node, isStatement, optionalId) { if ((!isStatement || optionalId) && this.isContextual("implements")) { return; } super.parseClassId(node, isStatement, optionalId, node.declare ? BIND_TS_AMBIENT : BIND_CLASS); const typeParameters = this.tsTryParseTypeParameters(); if (typeParameters) node.typeParameters = typeParameters; } parseClassPropertyAnnotation(node) { if (!node.optional && this.eat(types.bang)) { node.definite = true; } const type = this.tsTryParseTypeAnnotation(); if (type) node.typeAnnotation = type; } parseClassProperty(node) { this.parseClassPropertyAnnotation(node); if (this.state.isDeclareContext && this.match(types.eq)) { this.raise(this.state.start, TSErrors.DeclareClassFieldHasInitializer); } return super.parseClassProperty(node); } parseClassPrivateProperty(node) { if (node.abstract) { this.raise(node.start, TSErrors.PrivateElementHasAbstract); } if (node.accessibility) { this.raise(node.start, TSErrors.PrivateElementHasAccessibility, node.accessibility); } this.parseClassPropertyAnnotation(node); return super.parseClassPrivateProperty(node); } pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) { const typeParameters = this.tsTryParseTypeParameters(); if (typeParameters && isConstructor) { this.raise(typeParameters.start, TSErrors.ConstructorHasTypeParameters); } if (typeParameters) method.typeParameters = typeParameters; super.pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper); } pushClassPrivateMethod(classBody, method, isGenerator, isAsync) { const typeParameters = this.tsTryParseTypeParameters(); if (typeParameters) method.typeParameters = typeParameters; super.pushClassPrivateMethod(classBody, method, isGenerator, isAsync); } parseClassSuper(node) { super.parseClassSuper(node); if (node.superClass && this.isRelational("<")) { node.superTypeParameters = this.tsParseTypeArguments(); } if (this.eatContextual("implements")) { node.implements = this.tsParseHeritageClause("implements"); } } parseObjPropValue(prop, ...args) { const typeParameters = this.tsTryParseTypeParameters(); if (typeParameters) prop.typeParameters = typeParameters; super.parseObjPropValue(prop, ...args); } parseFunctionParams(node, allowModifiers) { const typeParameters = this.tsTryParseTypeParameters(); if (typeParameters) node.typeParameters = typeParameters; super.parseFunctionParams(node, allowModifiers); } parseVarId(decl, kind) { super.parseVarId(decl, kind); if (decl.id.type === "Identifier" && this.eat(types.bang)) { decl.definite = true; } const type = this.tsTryParseTypeAnnotation(); if (type) { decl.id.typeAnnotation = type; this.resetEndLocation(decl.id); } } parseAsyncArrowFromCallExpression(node, call) { if (this.match(types.colon)) { node.returnType = this.tsParseTypeAnnotation(); } return super.parseAsyncArrowFromCallExpression(node, call); } parseMaybeAssign(...args) { var _jsx, _jsx2, _typeCast, _jsx3, _typeCast2, _jsx4, _typeCast3; let state; let jsx; let typeCast; if (this.hasPlugin("jsx") && (this.match(types.jsxTagStart) || this.isRelational("<"))) { state = this.state.clone(); jsx = this.tryParse(() => super.parseMaybeAssign(...args), state); if (!jsx.error) return jsx.node; const { context } = this.state; if (context[context.length - 1] === types$1.j_oTag) { context.length -= 2; } else if (context[context.length - 1] === types$1.j_expr) { context.length -= 1; } } if (!((_jsx = jsx) != null && _jsx.error) && !this.isRelational("<")) { return super.parseMaybeAssign(...args); } let typeParameters; state = state || this.state.clone(); const arrow = this.tryParse(abort => { var _typeParameters; typeParameters = this.tsParseTypeParameters(); const expr = super.parseMaybeAssign(...args); if (expr.type !== "ArrowFunctionExpression" || expr.extra && expr.extra.parenthesized) { abort(); } if (((_typeParameters = typeParameters) == null ? void 0 : _typeParameters.params.length) !== 0) { this.resetStartLocationFromNode(expr, typeParameters); } expr.typeParameters = typeParameters; return expr; }, state); if (!arrow.error && !arrow.aborted) return arrow.node; if (!jsx) { assert(!this.hasPlugin("jsx")); typeCast = this.tryParse(() => super.parseMaybeAssign(...args), state); if (!typeCast.error) return typeCast.node; } if ((_jsx2 = jsx) != null && _jsx2.node) { this.state = jsx.failState; return jsx.node; } if (arrow.node) { this.state = arrow.failState; return arrow.node; } if ((_typeCast = typeCast) != null && _typeCast.node) { this.state = typeCast.failState; return typeCast.node; } if ((_jsx3 = jsx) != null && _jsx3.thrown) throw jsx.error; if (arrow.thrown) throw arrow.error; if ((_typeCast2 = typeCast) != null && _typeCast2.thrown) throw typeCast.error; throw ((_jsx4 = jsx) == null ? void 0 : _jsx4.error) || arrow.error || ((_typeCast3 = typeCast) == null ? void 0 : _typeCast3.error); } parseMaybeUnary(refExpressionErrors) { if (!this.hasPlugin("jsx") && this.isRelational("<")) { return this.tsParseTypeAssertion(); } else { return super.parseMaybeUnary(refExpressionErrors); } } parseArrow(node) { if (this.match(types.colon)) { const result = this.tryParse(abort => { const returnType = this.tsParseTypeOrTypePredicateAnnotation(types.colon); if (this.canInsertSemicolon() || !this.match(types.arrow)) abort(); return returnType; }); if (result.aborted) return; if (!result.thrown) { if (result.error) this.state = result.failState; node.returnType = result.node; } } return super.parseArrow(node); } parseAssignableListItemTypes(param) { if (this.eat(types.question)) { if (param.type !== "Identifier" && !this.state.isDeclareContext && !this.state.inType) { this.raise(param.start, TSErrors.PatternIsOptional); } param.optional = true; } const type = this.tsTryParseTypeAnnotation(); if (type) param.typeAnnotation = type; this.resetEndLocation(param); return param; } toAssignable(node, isLHS = false) { switch (node.type) { case "TSTypeCastExpression": return super.toAssignable(this.typeCastToParameter(node), isLHS); case "TSParameterProperty": return super.toAssignable(node, isLHS); case "TSAsExpression": case "TSNonNullExpression": case "TSTypeAssertion": node.expression = this.toAssignable(node.expression, isLHS); return node; default: return super.toAssignable(node, isLHS); } } checkLVal(expr, contextDescription, ...args) { switch (expr.type) { case "TSTypeCastExpression": return; case "TSParameterProperty": this.checkLVal(expr.parameter, "parameter property", ...args); return; case "TSAsExpression": case "TSNonNullExpression": case "TSTypeAssertion": this.checkLVal(expr.expression, contextDescription, ...args); return; default: super.checkLVal(expr, contextDescription, ...args); return; } } parseBindingAtom() { switch (this.state.type) { case types._this: return this.parseIdentifier(true); default: return super.parseBindingAtom(); } } parseMaybeDecoratorArguments(expr) { if (this.isRelational("<")) { const typeArguments = this.tsParseTypeArguments(); if (this.match(types.parenL)) { const call = super.parseMaybeDecoratorArguments(expr); call.typeParameters = typeArguments; return call; } this.unexpected(this.state.start, types.parenL); } return super.parseMaybeDecoratorArguments(expr); } isClassMethod() { return this.isRelational("<") || super.isClassMethod(); } isClassProperty() { return this.match(types.bang) || this.match(types.colon) || super.isClassProperty(); } parseMaybeDefault(...args) { const node = super.parseMaybeDefault(...args); if (node.type === "AssignmentPattern" && node.typeAnnotation && node.right.start < node.typeAnnotation.start) { this.raise(node.typeAnnotation.start, TSErrors.TypeAnnotationAfterAssign); } return node; } getTokenFromCode(code) { if (this.state.inType && (code === 62 || code === 60)) { return this.finishOp(types.relational, 1); } else { return super.getTokenFromCode(code); } } reScan_lt_gt() { if (this.match(types.relational)) { const code = this.input.charCodeAt(this.state.start); if (code === 60 || code === 62) { this.state.pos -= 1; this.readToken_lt_gt(code); } } } toAssignableList(exprList) { for (let i = 0; i < exprList.length; i++) { const expr = exprList[i]; if (!expr) continue; switch (expr.type) { case "TSTypeCastExpression": exprList[i] = this.typeCastToParameter(expr); break; case "TSAsExpression": case "TSTypeAssertion": if (!this.state.maybeInArrowParameters) { exprList[i] = this.typeCastToParameter(expr); } else { this.raise(expr.start, TSErrors.UnexpectedTypeCastInParameter); } break; } } return super.toAssignableList(...arguments); } typeCastToParameter(node) { node.expression.typeAnnotation = node.typeAnnotation; this.resetEndLocation(node.expression, node.typeAnnotation.end, node.typeAnnotation.loc.end); return node.expression; } shouldParseArrow() { return this.match(types.colon) || super.shouldParseArrow(); } shouldParseAsyncArrow() { return this.match(types.colon) || super.shouldParseAsyncArrow(); } canHaveLeadingDecorator() { return super.canHaveLeadingDecorator() || this.isAbstractClass(); } jsxParseOpeningElementAfterName(node) { if (this.isRelational("<")) { const typeArguments = this.tsTryParseAndCatch(() => this.tsParseTypeArguments()); if (typeArguments) node.typeParameters = typeArguments; } return super.jsxParseOpeningElementAfterName(node); } getGetterSetterExpectedParamCount(method) { const baseCount = super.getGetterSetterExpectedParamCount(method); const params = this.getObjectOrClassMethodParams(method); const firstParam = params[0]; const hasContextParam = firstParam && firstParam.type === "Identifier" && firstParam.name === "this"; return hasContextParam ? baseCount + 1 : baseCount; } parseCatchClauseParam() { const param = super.parseCatchClauseParam(); const type = this.tsTryParseTypeAnnotation(); if (type) { param.typeAnnotation = type; this.resetEndLocation(param); } return param; } tsInDeclareContext(cb) { const oldIsDeclareContext = this.state.isDeclareContext; this.state.isDeclareContext = true; try { return cb(); } finally { this.state.isDeclareContext = oldIsDeclareContext; } } parseClass(node, ...args) { const oldInAbstractClass = this.state.inAbstractClass; this.state.inAbstractClass = !!node.abstract; try { return super.parseClass(node, ...args); } finally { this.state.inAbstractClass = oldInAbstractClass; } } tsParseAbstractDeclaration(node) { if (this.match(types._class)) { node.abstract = true; return this.parseClass(node, true, false); } else if (this.isContextual("interface")) { if (!this.hasFollowingLineBreak()) { node.abstract = true; this.raise(node.start, TSErrors.NonClassMethodPropertyHasAbstractModifer); this.next(); return this.tsParseInterfaceDeclaration(node); } } else { this.unexpected(null, types._class); } } parseMethod(...args) { const method = super.parseMethod(...args); if (method.abstract) { const hasBody = this.hasPlugin("estree") ? !!method.value.body : !!method.body; if (hasBody) { const { key } = method; this.raise(method.start, TSErrors.AbstractMethodHasImplementation, key.type === "Identifier" ? key.name : `[${this.input.slice(key.start, key.end)}]`); } } return method; } }); types.placeholder = new TokenType("%%", { startsExpr: true }); var placeholders = (superClass => class extends superClass { parsePlaceholder(expectedNode) { if (this.match(types.placeholder)) { const node = this.startNode(); this.next(); this.assertNoSpace("Unexpected space in placeholder."); node.name = super.parseIdentifier(true); this.assertNoSpace("Unexpected space in placeholder."); this.expect(types.placeholder); return this.finishPlaceholder(node, expectedNode); } } finishPlaceholder(node, expectedNode) { const isFinished = !!(node.expectedNode && node.type === "Placeholder"); node.expectedNode = expectedNode; return isFinished ? node : this.finishNode(node, "Placeholder"); } getTokenFromCode(code) { if (code === 37 && this.input.charCodeAt(this.state.pos + 1) === 37) { return this.finishOp(types.placeholder, 2); } return super.getTokenFromCode(...arguments); } parseExprAtom() { return this.parsePlaceholder("Expression") || super.parseExprAtom(...arguments); } parseIdentifier() { return this.parsePlaceholder("Identifier") || super.parseIdentifier(...arguments); } checkReservedWord(word) { if (word !== undefined) super.checkReservedWord(...arguments); } parseBindingAtom() { return this.parsePlaceholder("Pattern") || super.parseBindingAtom(...arguments); } checkLVal(expr) { if (expr.type !== "Placeholder") super.checkLVal(...arguments); } toAssignable(node) { if (node && node.type === "Placeholder" && node.expectedNode === "Expression") { node.expectedNode = "Pattern"; return node; } return super.toAssignable(...arguments); } isLet(context) { if (super.isLet(context)) { return true; } if (!this.isContextual("let")) { return false; } if (context) return false; const nextToken = this.lookahead(); if (nextToken.type === types.placeholder) { return true; } return false; } verifyBreakContinue(node) { if (node.label && node.label.type === "Placeholder") return; super.verifyBreakContinue(...arguments); } parseExpressionStatement(node, expr) { if (expr.type !== "Placeholder" || expr.extra && expr.extra.parenthesized) { return super.parseExpressionStatement(...arguments); } if (this.match(types.colon)) { const stmt = node; stmt.label = this.finishPlaceholder(expr, "Identifier"); this.next(); stmt.body = this.parseStatement("label"); return this.finishNode(stmt, "LabeledStatement"); } this.semicolon(); node.name = expr.name; return this.finishPlaceholder(node, "Statement"); } parseBlock() { return this.parsePlaceholder("BlockStatement") || super.parseBlock(...arguments); } parseFunctionId() { return this.parsePlaceholder("Identifier") || super.parseFunctionId(...arguments); } parseClass(node, isStatement, optionalId) { const type = isStatement ? "ClassDeclaration" : "ClassExpression"; this.next(); this.takeDecorators(node); const oldStrict = this.state.strict; const placeholder = this.parsePlaceholder("Identifier"); if (placeholder) { if (this.match(types._extends) || this.match(types.placeholder) || this.match(types.braceL)) { node.id = placeholder; } else if (optionalId || !isStatement) { node.id = null; node.body = this.finishPlaceholder(placeholder, "ClassBody"); return this.finishNode(node, type); } else { this.unexpected(null, "A class name is required"); } } else { this.parseClassId(node, isStatement, optionalId); } this.parseClassSuper(node); node.body = this.parsePlaceholder("ClassBody") || this.parseClassBody(!!node.superClass, oldStrict); return this.finishNode(node, type); } parseExport(node) { const placeholder = this.parsePlaceholder("Identifier"); if (!placeholder) return super.parseExport(...arguments); if (!this.isContextual("from") && !this.match(types.comma)) { node.specifiers = []; node.source = null; node.declaration = this.finishPlaceholder(placeholder, "Declaration"); return this.finishNode(node, "ExportNamedDeclaration"); } this.expectPlugin("exportDefaultFrom"); const specifier = this.startNode(); specifier.exported = placeholder; node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")]; return super.parseExport(node); } isExportDefaultSpecifier() { if (this.match(types._default)) { const next = this.nextTokenStart(); if (this.isUnparsedContextual(next, "from")) { if (this.input.startsWith(types.placeholder.label, this.nextTokenStartSince(next + 4))) { return true; } } } return super.isExportDefaultSpecifier(); } maybeParseExportDefaultSpecifier(node) { if (node.specifiers && node.specifiers.length > 0) { return true; } return super.maybeParseExportDefaultSpecifier(...arguments); } checkExport(node) { const { specifiers } = node; if (specifiers != null && specifiers.length) { node.specifiers = specifiers.filter(node => node.exported.type === "Placeholder"); } super.checkExport(node); node.specifiers = specifiers; } parseImport(node) { const placeholder = this.parsePlaceholder("Identifier"); if (!placeholder) return super.parseImport(...arguments); node.specifiers = []; if (!this.isContextual("from") && !this.match(types.comma)) { node.source = this.finishPlaceholder(placeholder, "StringLiteral"); this.semicolon(); return this.finishNode(node, "ImportDeclaration"); } const specifier = this.startNodeAtNode(placeholder); specifier.local = placeholder; this.finishNode(specifier, "ImportDefaultSpecifier"); node.specifiers.push(specifier); if (this.eat(types.comma)) { const hasStarImport = this.maybeParseStarImportSpecifier(node); if (!hasStarImport) this.parseNamedImportSpecifiers(node); } this.expectContextual("from"); node.source = this.parseImportSource(); this.semicolon(); return this.finishNode(node, "ImportDeclaration"); } parseImportSource() { return this.parsePlaceholder("StringLiteral") || super.parseImportSource(...arguments); } }); var v8intrinsic = (superClass => class extends superClass { parseV8Intrinsic() { if (this.match(types.modulo)) { const v8IntrinsicStart = this.state.start; const node = this.startNode(); this.eat(types.modulo); if (this.match(types.name)) { const name = this.parseIdentifierName(this.state.start); const identifier = this.createIdentifier(node, name); identifier.type = "V8IntrinsicIdentifier"; if (this.match(types.parenL)) { return identifier; } } this.unexpected(v8IntrinsicStart); } } parseExprAtom() { return this.parseV8Intrinsic() || super.parseExprAtom(...arguments); } }); function hasPlugin(plugins, name) { return plugins.some(plugin => { if (Array.isArray(plugin)) { return plugin[0] === name; } else { return plugin === name; } }); } function getPluginOption(plugins, name, option) { const plugin = plugins.find(plugin => { if (Array.isArray(plugin)) { return plugin[0] === name; } else { return plugin === name; } }); if (plugin && Array.isArray(plugin)) { return plugin[1][option]; } return null; } const PIPELINE_PROPOSALS = ["minimal", "smart", "fsharp"]; const RECORD_AND_TUPLE_SYNTAX_TYPES = ["hash", "bar"]; function validatePlugins(plugins) { if (hasPlugin(plugins, "decorators")) { if (hasPlugin(plugins, "decorators-legacy")) { throw new Error("Cannot use the decorators and decorators-legacy plugin together"); } const decoratorsBeforeExport = getPluginOption(plugins, "decorators", "decoratorsBeforeExport"); if (decoratorsBeforeExport == null) { throw new Error("The 'decorators' plugin requires a 'decoratorsBeforeExport' option," + " whose value must be a boolean. If you are migrating from" + " Babylon/Babel 6 or want to use the old decorators proposal, you" + " should use the 'decorators-legacy' plugin instead of 'decorators'."); } else if (typeof decoratorsBeforeExport !== "boolean") { throw new Error("'decoratorsBeforeExport' must be a boolean."); } } if (hasPlugin(plugins, "flow") && hasPlugin(plugins, "typescript")) { throw new Error("Cannot combine flow and typescript plugins."); } if (hasPlugin(plugins, "placeholders") && hasPlugin(plugins, "v8intrinsic")) { throw new Error("Cannot combine placeholders and v8intrinsic plugins."); } if (hasPlugin(plugins, "pipelineOperator") && !PIPELINE_PROPOSALS.includes(getPluginOption(plugins, "pipelineOperator", "proposal"))) { throw new Error("'pipelineOperator' requires 'proposal' option whose value should be one of: " + PIPELINE_PROPOSALS.map(p => `'${p}'`).join(", ")); } if (hasPlugin(plugins, "moduleAttributes")) { if (hasPlugin(plugins, "importAssertions")) { throw new Error("Cannot combine importAssertions and moduleAttributes plugins."); } const moduleAttributesVerionPluginOption = getPluginOption(plugins, "moduleAttributes", "version"); if (moduleAttributesVerionPluginOption !== "may-2020") { throw new Error("The 'moduleAttributes' plugin requires a 'version' option," + " representing the last proposal update. Currently, the" + " only supported value is 'may-2020'."); } } if (hasPlugin(plugins, "recordAndTuple") && !RECORD_AND_TUPLE_SYNTAX_TYPES.includes(getPluginOption(plugins, "recordAndTuple", "syntaxType"))) { throw new Error("'recordAndTuple' requires 'syntaxType' option whose value should be one of: " + RECORD_AND_TUPLE_SYNTAX_TYPES.map(p => `'${p}'`).join(", ")); } } const mixinPlugins = { estree, jsx, flow, typescript, v8intrinsic, placeholders }; const mixinPluginNames = Object.keys(mixinPlugins); const defaultOptions = { sourceType: "script", sourceFilename: undefined, startLine: 1, allowAwaitOutsideFunction: false, allowReturnOutsideFunction: false, allowImportExportEverywhere: false, allowSuperOutsideMethod: false, allowUndeclaredExports: false, plugins: [], strictMode: null, ranges: false, tokens: false, createParenthesizedExpressions: false, errorRecovery: false }; function getOptions(opts) { const options = {}; for (const key of Object.keys(defaultOptions)) { options[key] = opts && opts[key] != null ? opts[key] : defaultOptions[key]; } return options; } class State { constructor() { this.strict = void 0; this.curLine = void 0; this.startLoc = void 0; this.endLoc = void 0; this.errors = []; this.potentialArrowAt = -1; this.noArrowAt = []; this.noArrowParamsConversionAt = []; this.maybeInArrowParameters = false; this.inPipeline = false; this.inType = false; this.noAnonFunctionType = false; this.inPropertyName = false; this.hasFlowComment = false; this.isIterator = false; this.isDeclareContext = false; this.inAbstractClass = false; this.topicContext = { maxNumOfResolvableTopics: 0, maxTopicIndex: null }; this.soloAwait = false; this.inFSharpPipelineDirectBody = false; this.labels = []; this.decoratorStack = [[]]; this.comments = []; this.trailingComments = []; this.leadingComments = []; this.commentStack = []; this.commentPreviousNode = null; this.pos = 0; this.lineStart = 0; this.type = types.eof; this.value = null; this.start = 0; this.end = 0; this.lastTokEndLoc = null; this.lastTokStartLoc = null; this.lastTokStart = 0; this.lastTokEnd = 0; this.context = [types$1.braceStatement]; this.exprAllowed = true; this.containsEsc = false; this.strictErrors = new Map(); this.exportedIdentifiers = []; this.tokensLength = 0; } init(options) { this.strict = options.strictMode === false ? false : options.sourceType === "module"; this.curLine = options.startLine; this.startLoc = this.endLoc = this.curPosition(); } curPosition() { return new Position(this.curLine, this.pos - this.lineStart); } clone(skipArrays) { const state = new State(); const keys = Object.keys(this); for (let i = 0, length = keys.length; i < length; i++) { const key = keys[i]; let val = this[key]; if (!skipArrays && Array.isArray(val)) { val = val.slice(); } state[key] = val; } return state; } } var _isDigit = function isDigit(code) { return code >= 48 && code <= 57; }; const VALID_REGEX_FLAGS = new Set(["g", "m", "s", "i", "y", "u"]); const forbiddenNumericSeparatorSiblings = { decBinOct: [46, 66, 69, 79, 95, 98, 101, 111], hex: [46, 88, 95, 120] }; const allowedNumericSeparatorSiblings = {}; allowedNumericSeparatorSiblings.bin = [48, 49]; allowedNumericSeparatorSiblings.oct = [...allowedNumericSeparatorSiblings.bin, 50, 51, 52, 53, 54, 55]; allowedNumericSeparatorSiblings.dec = [...allowedNumericSeparatorSiblings.oct, 56, 57]; allowedNumericSeparatorSiblings.hex = [...allowedNumericSeparatorSiblings.dec, 65, 66, 67, 68, 69, 70, 97, 98, 99, 100, 101, 102]; class Token { constructor(state) { this.type = state.type; this.value = state.value; this.start = state.start; this.end = state.end; this.loc = new SourceLocation(state.startLoc, state.endLoc); } } class Tokenizer extends ParserError { constructor(options, input) { super(); this.isLookahead = void 0; this.tokens = []; this.state = new State(); this.state.init(options); this.input = input; this.length = input.length; this.isLookahead = false; } pushToken(token) { this.tokens.length = this.state.tokensLength; this.tokens.push(token); ++this.state.tokensLength; } next() { if (!this.isLookahead) { this.checkKeywordEscapes(); if (this.options.tokens) { this.pushToken(new Token(this.state)); } } this.state.lastTokEnd = this.state.end; this.state.lastTokStart = this.state.start; this.state.lastTokEndLoc = this.state.endLoc; this.state.lastTokStartLoc = this.state.startLoc; this.nextToken(); } eat(type) { if (this.match(type)) { this.next(); return true; } else { return false; } } match(type) { return this.state.type === type; } lookahead() { const old = this.state; this.state = old.clone(true); this.isLookahead = true; this.next(); this.isLookahead = false; const curr = this.state; this.state = old; return curr; } nextTokenStart() { return this.nextTokenStartSince(this.state.pos); } nextTokenStartSince(pos) { skipWhiteSpace.lastIndex = pos; const skip = skipWhiteSpace.exec(this.input); return pos + skip[0].length; } lookaheadCharCode() { return this.input.charCodeAt(this.nextTokenStart()); } setStrict(strict) { this.state.strict = strict; if (strict) { this.state.strictErrors.forEach((message, pos) => this.raise(pos, message)); this.state.strictErrors.clear(); } } curContext() { return this.state.context[this.state.context.length - 1]; } nextToken() { const curContext = this.curContext(); if (!(curContext != null && curContext.preserveSpace)) this.skipSpace(); this.state.start = this.state.pos; this.state.startLoc = this.state.curPosition(); if (this.state.pos >= this.length) { this.finishToken(types.eof); return; } const override = curContext == null ? void 0 : curContext.override; if (override) { override(this); } else { this.getTokenFromCode(this.input.codePointAt(this.state.pos)); } } pushComment(block, text, start, end, startLoc, endLoc) { const comment = { type: block ? "CommentBlock" : "CommentLine", value: text, start: start, end: end, loc: new SourceLocation(startLoc, endLoc) }; if (this.options.tokens) this.pushToken(comment); this.state.comments.push(comment); this.addComment(comment); } skipBlockComment() { const startLoc = this.state.curPosition(); const start = this.state.pos; const end = this.input.indexOf("*/", this.state.pos + 2); if (end === -1) throw this.raise(start, ErrorMessages.UnterminatedComment); this.state.pos = end + 2; lineBreakG.lastIndex = start; let match; while ((match = lineBreakG.exec(this.input)) && match.index < this.state.pos) { ++this.state.curLine; this.state.lineStart = match.index + match[0].length; } if (this.isLookahead) return; this.pushComment(true, this.input.slice(start + 2, end), start, this.state.pos, startLoc, this.state.curPosition()); } skipLineComment(startSkip) { const start = this.state.pos; const startLoc = this.state.curPosition(); let ch = this.input.charCodeAt(this.state.pos += startSkip); if (this.state.pos < this.length) { while (!isNewLine(ch) && ++this.state.pos < this.length) { ch = this.input.charCodeAt(this.state.pos); } } if (this.isLookahead) return; this.pushComment(false, this.input.slice(start + startSkip, this.state.pos), start, this.state.pos, startLoc, this.state.curPosition()); } skipSpace() { loop: while (this.state.pos < this.length) { const ch = this.input.charCodeAt(this.state.pos); switch (ch) { case 32: case 160: case 9: ++this.state.pos; break; case 13: if (this.input.charCodeAt(this.state.pos + 1) === 10) { ++this.state.pos; } case 10: case 8232: case 8233: ++this.state.pos; ++this.state.curLine; this.state.lineStart = this.state.pos; break; case 47: switch (this.input.charCodeAt(this.state.pos + 1)) { case 42: this.skipBlockComment(); break; case 47: this.skipLineComment(2); break; default: break loop; } break; default: if (isWhitespace(ch)) { ++this.state.pos; } else { break loop; } } } } finishToken(type, val) { this.state.end = this.state.pos; this.state.endLoc = this.state.curPosition(); const prevType = this.state.type; this.state.type = type; this.state.value = val; if (!this.isLookahead) this.updateContext(prevType); } readToken_numberSign() { if (this.state.pos === 0 && this.readToken_interpreter()) { return; } const nextPos = this.state.pos + 1; const next = this.input.charCodeAt(nextPos); if (next >= 48 && next <= 57) { throw this.raise(this.state.pos, ErrorMessages.UnexpectedDigitAfterHash); } if (next === 123 || next === 91 && this.hasPlugin("recordAndTuple")) { this.expectPlugin("recordAndTuple"); if (this.getPluginOption("recordAndTuple", "syntaxType") !== "hash") { throw this.raise(this.state.pos, next === 123 ? ErrorMessages.RecordExpressionHashIncorrectStartSyntaxType : ErrorMessages.TupleExpressionHashIncorrectStartSyntaxType); } if (next === 123) { this.finishToken(types.braceHashL); } else { this.finishToken(types.bracketHashL); } this.state.pos += 2; } else { this.finishOp(types.hash, 1); } } readToken_dot() { const next = this.input.charCodeAt(this.state.pos + 1); if (next >= 48 && next <= 57) { this.readNumber(true); return; } if (next === 46 && this.input.charCodeAt(this.state.pos + 2) === 46) { this.state.pos += 3; this.finishToken(types.ellipsis); } else { ++this.state.pos; this.finishToken(types.dot); } } readToken_slash() { if (this.state.exprAllowed && !this.state.inType) { ++this.state.pos; this.readRegexp(); return; } const next = this.input.charCodeAt(this.state.pos + 1); if (next === 61) { this.finishOp(types.assign, 2); } else { this.finishOp(types.slash, 1); } } readToken_interpreter() { if (this.state.pos !== 0 || this.length < 2) return false; let ch = this.input.charCodeAt(this.state.pos + 1); if (ch !== 33) return false; const start = this.state.pos; this.state.pos += 1; while (!isNewLine(ch) && ++this.state.pos < this.length) { ch = this.input.charCodeAt(this.state.pos); } const value = this.input.slice(start + 2, this.state.pos); this.finishToken(types.interpreterDirective, value); return true; } readToken_mult_modulo(code) { let type = code === 42 ? types.star : types.modulo; let width = 1; let next = this.input.charCodeAt(this.state.pos + 1); const exprAllowed = this.state.exprAllowed; if (code === 42 && next === 42) { width++; next = this.input.charCodeAt(this.state.pos + 2); type = types.exponent; } if (next === 61 && !exprAllowed) { width++; type = types.assign; } this.finishOp(type, width); } readToken_pipe_amp(code) { const next = this.input.charCodeAt(this.state.pos + 1); if (next === code) { if (this.input.charCodeAt(this.state.pos + 2) === 61) { this.finishOp(types.assign, 3); } else { this.finishOp(code === 124 ? types.logicalOR : types.logicalAND, 2); } return; } if (code === 124) { if (next === 62) { this.finishOp(types.pipeline, 2); return; } if (this.hasPlugin("recordAndTuple") && next === 125) { if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") { throw this.raise(this.state.pos, ErrorMessages.RecordExpressionBarIncorrectEndSyntaxType); } this.finishOp(types.braceBarR, 2); return; } if (this.hasPlugin("recordAndTuple") && next === 93) { if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") { throw this.raise(this.state.pos, ErrorMessages.TupleExpressionBarIncorrectEndSyntaxType); } this.finishOp(types.bracketBarR, 2); return; } } if (next === 61) { this.finishOp(types.assign, 2); return; } this.finishOp(code === 124 ? types.bitwiseOR : types.bitwiseAND, 1); } readToken_caret() { const next = this.input.charCodeAt(this.state.pos + 1); if (next === 61) { this.finishOp(types.assign, 2); } else { this.finishOp(types.bitwiseXOR, 1); } } readToken_plus_min(code) { const next = this.input.charCodeAt(this.state.pos + 1); if (next === code) { if (next === 45 && !this.inModule && this.input.charCodeAt(this.state.pos + 2) === 62 && (this.state.lastTokEnd === 0 || this.hasPrecedingLineBreak())) { this.skipLineComment(3); this.skipSpace(); this.nextToken(); return; } this.finishOp(types.incDec, 2); return; } if (next === 61) { this.finishOp(types.assign, 2); } else { this.finishOp(types.plusMin, 1); } } readToken_lt_gt(code) { const next = this.input.charCodeAt(this.state.pos + 1); let size = 1; if (next === code) { size = code === 62 && this.input.charCodeAt(this.state.pos + 2) === 62 ? 3 : 2; if (this.input.charCodeAt(this.state.pos + size) === 61) { this.finishOp(types.assign, size + 1); return; } this.finishOp(types.bitShift, size); return; } if (next === 33 && code === 60 && !this.inModule && this.input.charCodeAt(this.state.pos + 2) === 45 && this.input.charCodeAt(this.state.pos + 3) === 45) { this.skipLineComment(4); this.skipSpace(); this.nextToken(); return; } if (next === 61) { size = 2; } this.finishOp(types.relational, size); } readToken_eq_excl(code) { const next = this.input.charCodeAt(this.state.pos + 1); if (next === 61) { this.finishOp(types.equality, this.input.charCodeAt(this.state.pos + 2) === 61 ? 3 : 2); return; } if (code === 61 && next === 62) { this.state.pos += 2; this.finishToken(types.arrow); return; } this.finishOp(code === 61 ? types.eq : types.bang, 1); } readToken_question() { const next = this.input.charCodeAt(this.state.pos + 1); const next2 = this.input.charCodeAt(this.state.pos + 2); if (next === 63) { if (next2 === 61) { this.finishOp(types.assign, 3); } else { this.finishOp(types.nullishCoalescing, 2); } } else if (next === 46 && !(next2 >= 48 && next2 <= 57)) { this.state.pos += 2; this.finishToken(types.questionDot); } else { ++this.state.pos; this.finishToken(types.question); } } getTokenFromCode(code) { switch (code) { case 46: this.readToken_dot(); return; case 40: ++this.state.pos; this.finishToken(types.parenL); return; case 41: ++this.state.pos; this.finishToken(types.parenR); return; case 59: ++this.state.pos; this.finishToken(types.semi); return; case 44: ++this.state.pos; this.finishToken(types.comma); return; case 91: if (this.hasPlugin("recordAndTuple") && this.input.charCodeAt(this.state.pos + 1) === 124) { if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") { throw this.raise(this.state.pos, ErrorMessages.TupleExpressionBarIncorrectStartSyntaxType); } this.finishToken(types.bracketBarL); this.state.pos += 2; } else { ++this.state.pos; this.finishToken(types.bracketL); } return; case 93: ++this.state.pos; this.finishToken(types.bracketR); return; case 123: if (this.hasPlugin("recordAndTuple") && this.input.charCodeAt(this.state.pos + 1) === 124) { if (this.getPluginOption("recordAndTuple", "syntaxType") !== "bar") { throw this.raise(this.state.pos, ErrorMessages.RecordExpressionBarIncorrectStartSyntaxType); } this.finishToken(types.braceBarL); this.state.pos += 2; } else { ++this.state.pos; this.finishToken(types.braceL); } return; case 125: ++this.state.pos; this.finishToken(types.braceR); return; case 58: if (this.hasPlugin("functionBind") && this.input.charCodeAt(this.state.pos + 1) === 58) { this.finishOp(types.doubleColon, 2); } else { ++this.state.pos; this.finishToken(types.colon); } return; case 63: this.readToken_question(); return; case 96: ++this.state.pos; this.finishToken(types.backQuote); return; case 48: { const next = this.input.charCodeAt(this.state.pos + 1); if (next === 120 || next === 88) { this.readRadixNumber(16); return; } if (next === 111 || next === 79) { this.readRadixNumber(8); return; } if (next === 98 || next === 66) { this.readRadixNumber(2); return; } } case 49: case 50: case 51: case 52: case 53: case 54: case 55: case 56: case 57: this.readNumber(false); return; case 34: case 39: this.readString(code); return; case 47: this.readToken_slash(); return; case 37: case 42: this.readToken_mult_modulo(code); return; case 124: case 38: this.readToken_pipe_amp(code); return; case 94: this.readToken_caret(); return; case 43: case 45: this.readToken_plus_min(code); return; case 60: case 62: this.readToken_lt_gt(code); return; case 61: case 33: this.readToken_eq_excl(code); return; case 126: this.finishOp(types.tilde, 1); return; case 64: ++this.state.pos; this.finishToken(types.at); return; case 35: this.readToken_numberSign(); return; case 92: this.readWord(); return; default: if (isIdentifierStart(code)) { this.readWord(); return; } } throw this.raise(this.state.pos, ErrorMessages.InvalidOrUnexpectedToken, String.fromCodePoint(code)); } finishOp(type, size) { const str = this.input.slice(this.state.pos, this.state.pos + size); this.state.pos += size; this.finishToken(type, str); } readRegexp() { const start = this.state.pos; let escaped, inClass; for (;;) { if (this.state.pos >= this.length) { throw this.raise(start, ErrorMessages.UnterminatedRegExp); } const ch = this.input.charAt(this.state.pos); if (lineBreak.test(ch)) { throw this.raise(start, ErrorMessages.UnterminatedRegExp); } if (escaped) { escaped = false; } else { if (ch === "[") { inClass = true; } else if (ch === "]" && inClass) { inClass = false; } else if (ch === "/" && !inClass) { break; } escaped = ch === "\\"; } ++this.state.pos; } const content = this.input.slice(start, this.state.pos); ++this.state.pos; let mods = ""; while (this.state.pos < this.length) { const char = this.input[this.state.pos]; const charCode = this.input.codePointAt(this.state.pos); if (VALID_REGEX_FLAGS.has(char)) { if (mods.indexOf(char) > -1) { this.raise(this.state.pos + 1, ErrorMessages.DuplicateRegExpFlags); } } else if (isIdentifierChar(charCode) || charCode === 92) { this.raise(this.state.pos + 1, ErrorMessages.MalformedRegExpFlags); } else { break; } ++this.state.pos; mods += char; } this.finishToken(types.regexp, { pattern: content, flags: mods }); } readInt(radix, len, forceLen, allowNumSeparator = true) { const start = this.state.pos; const forbiddenSiblings = radix === 16 ? forbiddenNumericSeparatorSiblings.hex : forbiddenNumericSeparatorSiblings.decBinOct; const allowedSiblings = radix === 16 ? allowedNumericSeparatorSiblings.hex : radix === 10 ? allowedNumericSeparatorSiblings.dec : radix === 8 ? allowedNumericSeparatorSiblings.oct : allowedNumericSeparatorSiblings.bin; let invalid = false; let total = 0; for (let i = 0, e = len == null ? Infinity : len; i < e; ++i) { const code = this.input.charCodeAt(this.state.pos); let val; if (code === 95) { const prev = this.input.charCodeAt(this.state.pos - 1); const next = this.input.charCodeAt(this.state.pos + 1); if (allowedSiblings.indexOf(next) === -1) { this.raise(this.state.pos, ErrorMessages.UnexpectedNumericSeparator); } else if (forbiddenSiblings.indexOf(prev) > -1 || forbiddenSiblings.indexOf(next) > -1 || Number.isNaN(next)) { this.raise(this.state.pos, ErrorMessages.UnexpectedNumericSeparator); } if (!allowNumSeparator) { this.raise(this.state.pos, ErrorMessages.NumericSeparatorInEscapeSequence); } ++this.state.pos; continue; } if (code >= 97) { val = code - 97 + 10; } else if (code >= 65) { val = code - 65 + 10; } else if (_isDigit(code)) { val = code - 48; } else { val = Infinity; } if (val >= radix) { if (this.options.errorRecovery && val <= 9) { val = 0; this.raise(this.state.start + i + 2, ErrorMessages.InvalidDigit, radix); } else if (forceLen) { val = 0; invalid = true; } else { break; } } ++this.state.pos; total = total * radix + val; } if (this.state.pos === start || len != null && this.state.pos - start !== len || invalid) { return null; } return total; } readRadixNumber(radix) { const start = this.state.pos; let isBigInt = false; this.state.pos += 2; const val = this.readInt(radix); if (val == null) { this.raise(this.state.start + 2, ErrorMessages.InvalidDigit, radix); } const next = this.input.charCodeAt(this.state.pos); if (next === 110) { ++this.state.pos; isBigInt = true; } else if (next === 109) { throw this.raise(start, ErrorMessages.InvalidDecimal); } if (isIdentifierStart(this.input.codePointAt(this.state.pos))) { throw this.raise(this.state.pos, ErrorMessages.NumberIdentifier); } if (isBigInt) { const str = this.input.slice(start, this.state.pos).replace(/[_n]/g, ""); this.finishToken(types.bigint, str); return; } this.finishToken(types.num, val); } readNumber(startsWithDot) { const start = this.state.pos; let isFloat = false; let isBigInt = false; let isDecimal = false; let hasExponent = false; let isOctal = false; if (!startsWithDot && this.readInt(10) === null) { this.raise(start, ErrorMessages.InvalidNumber); } const hasLeadingZero = this.state.pos - start >= 2 && this.input.charCodeAt(start) === 48; if (hasLeadingZero) { const integer = this.input.slice(start, this.state.pos); this.recordStrictModeErrors(start, ErrorMessages.StrictOctalLiteral); if (!this.state.strict) { const underscorePos = integer.indexOf("_"); if (underscorePos > 0) { this.raise(underscorePos + start, ErrorMessages.ZeroDigitNumericSeparator); } } isOctal = hasLeadingZero && !/[89]/.test(integer); } let next = this.input.charCodeAt(this.state.pos); if (next === 46 && !isOctal) { ++this.state.pos; this.readInt(10); isFloat = true; next = this.input.charCodeAt(this.state.pos); } if ((next === 69 || next === 101) && !isOctal) { next = this.input.charCodeAt(++this.state.pos); if (next === 43 || next === 45) { ++this.state.pos; } if (this.readInt(10) === null) { this.raise(start, ErrorMessages.InvalidOrMissingExponent); } isFloat = true; hasExponent = true; next = this.input.charCodeAt(this.state.pos); } if (next === 110) { if (isFloat || hasLeadingZero) { this.raise(start, ErrorMessages.InvalidBigIntLiteral); } ++this.state.pos; isBigInt = true; } if (next === 109) { this.expectPlugin("decimal", this.state.pos); if (hasExponent || hasLeadingZero) { this.raise(start, ErrorMessages.InvalidDecimal); } ++this.state.pos; isDecimal = true; } if (isIdentifierStart(this.input.codePointAt(this.state.pos))) { throw this.raise(this.state.pos, ErrorMessages.NumberIdentifier); } const str = this.input.slice(start, this.state.pos).replace(/[_mn]/g, ""); if (isBigInt) { this.finishToken(types.bigint, str); return; } if (isDecimal) { this.finishToken(types.decimal, str); return; } const val = isOctal ? parseInt(str, 8) : parseFloat(str); this.finishToken(types.num, val); } readCodePoint(throwOnInvalid) { const ch = this.input.charCodeAt(this.state.pos); let code; if (ch === 123) { const codePos = ++this.state.pos; code = this.readHexChar(this.input.indexOf("}", this.state.pos) - this.state.pos, true, throwOnInvalid); ++this.state.pos; if (code !== null && code > 0x10ffff) { if (throwOnInvalid) { this.raise(codePos, ErrorMessages.InvalidCodePoint); } else { return null; } } } else { code = this.readHexChar(4, false, throwOnInvalid); } return code; } readString(quote) { let out = "", chunkStart = ++this.state.pos; for (;;) { if (this.state.pos >= this.length) { throw this.raise(this.state.start, ErrorMessages.UnterminatedString); } const ch = this.input.charCodeAt(this.state.pos); if (ch === quote) break; if (ch === 92) { out += this.input.slice(chunkStart, this.state.pos); out += this.readEscapedChar(false); chunkStart = this.state.pos; } else if (ch === 8232 || ch === 8233) { ++this.state.pos; ++this.state.curLine; this.state.lineStart = this.state.pos; } else if (isNewLine(ch)) { throw this.raise(this.state.start, ErrorMessages.UnterminatedString); } else { ++this.state.pos; } } out += this.input.slice(chunkStart, this.state.pos++); this.finishToken(types.string, out); } readTmplToken() { let out = "", chunkStart = this.state.pos, containsInvalid = false; for (;;) { if (this.state.pos >= this.length) { throw this.raise(this.state.start, ErrorMessages.UnterminatedTemplate); } const ch = this.input.charCodeAt(this.state.pos); if (ch === 96 || ch === 36 && this.input.charCodeAt(this.state.pos + 1) === 123) { if (this.state.pos === this.state.start && this.match(types.template)) { if (ch === 36) { this.state.pos += 2; this.finishToken(types.dollarBraceL); return; } else { ++this.state.pos; this.finishToken(types.backQuote); return; } } out += this.input.slice(chunkStart, this.state.pos); this.finishToken(types.template, containsInvalid ? null : out); return; } if (ch === 92) { out += this.input.slice(chunkStart, this.state.pos); const escaped = this.readEscapedChar(true); if (escaped === null) { containsInvalid = true; } else { out += escaped; } chunkStart = this.state.pos; } else if (isNewLine(ch)) { out += this.input.slice(chunkStart, this.state.pos); ++this.state.pos; switch (ch) { case 13: if (this.input.charCodeAt(this.state.pos) === 10) { ++this.state.pos; } case 10: out += "\n"; break; default: out += String.fromCharCode(ch); break; } ++this.state.curLine; this.state.lineStart = this.state.pos; chunkStart = this.state.pos; } else { ++this.state.pos; } } } recordStrictModeErrors(pos, message) { if (this.state.strict && !this.state.strictErrors.has(pos)) { this.raise(pos, message); } else { this.state.strictErrors.set(pos, message); } } readEscapedChar(inTemplate) { const throwOnInvalid = !inTemplate; const ch = this.input.charCodeAt(++this.state.pos); ++this.state.pos; switch (ch) { case 110: return "\n"; case 114: return "\r"; case 120: { const code = this.readHexChar(2, false, throwOnInvalid); return code === null ? null : String.fromCharCode(code); } case 117: { const code = this.readCodePoint(throwOnInvalid); return code === null ? null : String.fromCodePoint(code); } case 116: return "\t"; case 98: return "\b"; case 118: return "\u000b"; case 102: return "\f"; case 13: if (this.input.charCodeAt(this.state.pos) === 10) { ++this.state.pos; } case 10: this.state.lineStart = this.state.pos; ++this.state.curLine; case 8232: case 8233: return ""; case 56: case 57: if (inTemplate) { return null; } else { this.recordStrictModeErrors(this.state.pos - 1, ErrorMessages.StrictNumericEscape); } default: if (ch >= 48 && ch <= 55) { const codePos = this.state.pos - 1; const match = this.input.substr(this.state.pos - 1, 3).match(/^[0-7]+/); let octalStr = match[0]; let octal = parseInt(octalStr, 8); if (octal > 255) { octalStr = octalStr.slice(0, -1); octal = parseInt(octalStr, 8); } this.state.pos += octalStr.length - 1; const next = this.input.charCodeAt(this.state.pos); if (octalStr !== "0" || next === 56 || next === 57) { if (inTemplate) { return null; } else { this.recordStrictModeErrors(codePos, ErrorMessages.StrictNumericEscape); } } return String.fromCharCode(octal); } return String.fromCharCode(ch); } } readHexChar(len, forceLen, throwOnInvalid) { const codePos = this.state.pos; const n = this.readInt(16, len, forceLen, false); if (n === null) { if (throwOnInvalid) { this.raise(codePos, ErrorMessages.InvalidEscapeSequence); } else { this.state.pos = codePos - 1; } } return n; } readWord1() { let word = ""; this.state.containsEsc = false; const start = this.state.pos; let chunkStart = this.state.pos; while (this.state.pos < this.length) { const ch = this.input.codePointAt(this.state.pos); if (isIdentifierChar(ch)) { this.state.pos += ch <= 0xffff ? 1 : 2; } else if (this.state.isIterator && ch === 64) { ++this.state.pos; } else if (ch === 92) { this.state.containsEsc = true; word += this.input.slice(chunkStart, this.state.pos); const escStart = this.state.pos; const identifierCheck = this.state.pos === start ? isIdentifierStart : isIdentifierChar; if (this.input.charCodeAt(++this.state.pos) !== 117) { this.raise(this.state.pos, ErrorMessages.MissingUnicodeEscape); continue; } ++this.state.pos; const esc = this.readCodePoint(true); if (esc !== null) { if (!identifierCheck(esc)) { this.raise(escStart, ErrorMessages.EscapedCharNotAnIdentifier); } word += String.fromCodePoint(esc); } chunkStart = this.state.pos; } else { break; } } return word + this.input.slice(chunkStart, this.state.pos); } isIterator(word) { return word === "@@iterator" || word === "@@asyncIterator"; } readWord() { const word = this.readWord1(); const type = keywords.get(word) || types.name; if (this.state.isIterator && (!this.isIterator(word) || !this.state.inType)) { this.raise(this.state.pos, ErrorMessages.InvalidIdentifier, word); } this.finishToken(type, word); } checkKeywordEscapes() { const kw = this.state.type.keyword; if (kw && this.state.containsEsc) { this.raise(this.state.start, ErrorMessages.InvalidEscapedReservedWord, kw); } } braceIsBlock(prevType) { const parent = this.curContext(); if (parent === types$1.functionExpression || parent === types$1.functionStatement) { return true; } if (prevType === types.colon && (parent === types$1.braceStatement || parent === types$1.braceExpression)) { return !parent.isExpr; } if (prevType === types._return || prevType === types.name && this.state.exprAllowed) { return this.hasPrecedingLineBreak(); } if (prevType === types._else || prevType === types.semi || prevType === types.eof || prevType === types.parenR || prevType === types.arrow) { return true; } if (prevType === types.braceL) { return parent === types$1.braceStatement; } if (prevType === types._var || prevType === types._const || prevType === types.name) { return false; } if (prevType === types.relational) { return true; } return !this.state.exprAllowed; } updateContext(prevType) { const type = this.state.type; let update; if (type.keyword && (prevType === types.dot || prevType === types.questionDot)) { this.state.exprAllowed = false; } else if (update = type.updateContext) { update.call(this, prevType); } else { this.state.exprAllowed = type.beforeExpr; } } } class ClassScope { constructor() { this.privateNames = new Set(); this.loneAccessors = new Map(); this.undefinedPrivateNames = new Map(); } } class ClassScopeHandler { constructor(raise) { this.stack = []; this.undefinedPrivateNames = new Map(); this.raise = raise; } current() { return this.stack[this.stack.length - 1]; } enter() { this.stack.push(new ClassScope()); } exit() { const oldClassScope = this.stack.pop(); const current = this.current(); for (const [name, pos] of Array.from(oldClassScope.undefinedPrivateNames)) { if (current) { if (!current.undefinedPrivateNames.has(name)) { current.undefinedPrivateNames.set(name, pos); } } else { this.raise(pos, ErrorMessages.InvalidPrivateFieldResolution, name); } } } declarePrivateName(name, elementType, pos) { const classScope = this.current(); let redefined = classScope.privateNames.has(name); if (elementType & CLASS_ELEMENT_KIND_ACCESSOR) { const accessor = redefined && classScope.loneAccessors.get(name); if (accessor) { const oldStatic = accessor & CLASS_ELEMENT_FLAG_STATIC; const newStatic = elementType & CLASS_ELEMENT_FLAG_STATIC; const oldKind = accessor & CLASS_ELEMENT_KIND_ACCESSOR; const newKind = elementType & CLASS_ELEMENT_KIND_ACCESSOR; redefined = oldKind === newKind || oldStatic !== newStatic; if (!redefined) classScope.loneAccessors.delete(name); } else if (!redefined) { classScope.loneAccessors.set(name, elementType); } } if (redefined) { this.raise(pos, ErrorMessages.PrivateNameRedeclaration, name); } classScope.privateNames.add(name); classScope.undefinedPrivateNames.delete(name); } usePrivateName(name, pos) { let classScope; for (classScope of this.stack) { if (classScope.privateNames.has(name)) return; } if (classScope) { classScope.undefinedPrivateNames.set(name, pos); } else { this.raise(pos, ErrorMessages.InvalidPrivateFieldResolution, name); } } } const kExpression = 0, kMaybeArrowParameterDeclaration = 1, kMaybeAsyncArrowParameterDeclaration = 2, kParameterDeclaration = 3; class ExpressionScope { constructor(type = kExpression) { this.type = void 0; this.type = type; } canBeArrowParameterDeclaration() { return this.type === kMaybeAsyncArrowParameterDeclaration || this.type === kMaybeArrowParameterDeclaration; } isCertainlyParameterDeclaration() { return this.type === kParameterDeclaration; } } class ArrowHeadParsingScope extends ExpressionScope { constructor(type) { super(type); this.errors = new Map(); } recordDeclarationError(pos, message) { this.errors.set(pos, message); } clearDeclarationError(pos) { this.errors.delete(pos); } iterateErrors(iterator) { this.errors.forEach(iterator); } } class ExpressionScopeHandler { constructor(raise) { this.stack = [new ExpressionScope()]; this.raise = raise; } enter(scope) { this.stack.push(scope); } exit() { this.stack.pop(); } recordParameterInitializerError(pos, message) { const { stack } = this; let i = stack.length - 1; let scope = stack[i]; while (!scope.isCertainlyParameterDeclaration()) { if (scope.canBeArrowParameterDeclaration()) { scope.recordDeclarationError(pos, message); } else { return; } scope = stack[--i]; } this.raise(pos, message); } recordParenthesizedIdentifierError(pos, message) { const { stack } = this; const scope = stack[stack.length - 1]; if (scope.isCertainlyParameterDeclaration()) { this.raise(pos, message); } else if (scope.canBeArrowParameterDeclaration()) { scope.recordDeclarationError(pos, message); } else { return; } } recordAsyncArrowParametersError(pos, message) { const { stack } = this; let i = stack.length - 1; let scope = stack[i]; while (scope.canBeArrowParameterDeclaration()) { if (scope.type === kMaybeAsyncArrowParameterDeclaration) { scope.recordDeclarationError(pos, message); } scope = stack[--i]; } } validateAsPattern() { const { stack } = this; const currentScope = stack[stack.length - 1]; if (!currentScope.canBeArrowParameterDeclaration()) return; currentScope.iterateErrors((message, pos) => { this.raise(pos, message); let i = stack.length - 2; let scope = stack[i]; while (scope.canBeArrowParameterDeclaration()) { scope.clearDeclarationError(pos); scope = stack[--i]; } }); } } function newParameterDeclarationScope() { return new ExpressionScope(kParameterDeclaration); } function newArrowHeadScope() { return new ArrowHeadParsingScope(kMaybeArrowParameterDeclaration); } function newAsyncArrowScope() { return new ArrowHeadParsingScope(kMaybeAsyncArrowParameterDeclaration); } function newExpressionScope() { return new ExpressionScope(); } class UtilParser extends Tokenizer { addExtra(node, key, val) { if (!node) return; const extra = node.extra = node.extra || {}; extra[key] = val; } isRelational(op) { return this.match(types.relational) && this.state.value === op; } expectRelational(op) { if (this.isRelational(op)) { this.next(); } else { this.unexpected(null, types.relational); } } isContextual(name) { return this.match(types.name) && this.state.value === name && !this.state.containsEsc; } isUnparsedContextual(nameStart, name) { const nameEnd = nameStart + name.length; return this.input.slice(nameStart, nameEnd) === name && (nameEnd === this.input.length || !isIdentifierChar(this.input.charCodeAt(nameEnd))); } isLookaheadContextual(name) { const next = this.nextTokenStart(); return this.isUnparsedContextual(next, name); } eatContextual(name) { return this.isContextual(name) && this.eat(types.name); } expectContextual(name, message) { if (!this.eatContextual(name)) this.unexpected(null, message); } canInsertSemicolon() { return this.match(types.eof) || this.match(types.braceR) || this.hasPrecedingLineBreak(); } hasPrecedingLineBreak() { return lineBreak.test(this.input.slice(this.state.lastTokEnd, this.state.start)); } hasFollowingLineBreak() { return lineBreak.test(this.input.slice(this.state.end, this.nextTokenStart())); } isLineTerminator() { return this.eat(types.semi) || this.canInsertSemicolon(); } semicolon(allowAsi = true) { if (allowAsi ? this.isLineTerminator() : this.eat(types.semi)) return; this.raise(this.state.lastTokEnd, ErrorMessages.MissingSemicolon); } expect(type, pos) { this.eat(type) || this.unexpected(pos, type); } assertNoSpace(message = "Unexpected space.") { if (this.state.start > this.state.lastTokEnd) { this.raise(this.state.lastTokEnd, message); } } unexpected(pos, messageOrType = "Unexpected token") { if (typeof messageOrType !== "string") { messageOrType = `Unexpected token, expected "${messageOrType.label}"`; } throw this.raise(pos != null ? pos : this.state.start, messageOrType); } expectPlugin(name, pos) { if (!this.hasPlugin(name)) { throw this.raiseWithData(pos != null ? pos : this.state.start, { missingPlugin: [name] }, `This experimental syntax requires enabling the parser plugin: '${name}'`); } return true; } expectOnePlugin(names, pos) { if (!names.some(n => this.hasPlugin(n))) { throw this.raiseWithData(pos != null ? pos : this.state.start, { missingPlugin: names }, `This experimental syntax requires enabling one of the following parser plugin(s): '${names.join(", ")}'`); } } tryParse(fn, oldState = this.state.clone()) { const abortSignal = { node: null }; try { const node = fn((node = null) => { abortSignal.node = node; throw abortSignal; }); if (this.state.errors.length > oldState.errors.length) { const failState = this.state; this.state = oldState; return { node, error: failState.errors[oldState.errors.length], thrown: false, aborted: false, failState }; } return { node, error: null, thrown: false, aborted: false, failState: null }; } catch (error) { const failState = this.state; this.state = oldState; if (error instanceof SyntaxError) { return { node: null, error, thrown: true, aborted: false, failState }; } if (error === abortSignal) { return { node: abortSignal.node, error: null, thrown: false, aborted: true, failState }; } throw error; } } checkExpressionErrors(refExpressionErrors, andThrow) { if (!refExpressionErrors) return false; const { shorthandAssign, doubleProto } = refExpressionErrors; if (!andThrow) return shorthandAssign >= 0 || doubleProto >= 0; if (shorthandAssign >= 0) { this.unexpected(shorthandAssign); } if (doubleProto >= 0) { this.raise(doubleProto, ErrorMessages.DuplicateProto); } } isLiteralPropertyName() { return this.match(types.name) || !!this.state.type.keyword || this.match(types.string) || this.match(types.num) || this.match(types.bigint) || this.match(types.decimal); } isPrivateName(node) { return node.type === "PrivateName"; } getPrivateNameSV(node) { return node.id.name; } hasPropertyAsPrivateName(node) { return (node.type === "MemberExpression" || node.type === "OptionalMemberExpression") && this.isPrivateName(node.property); } isOptionalChain(node) { return node.type === "OptionalMemberExpression" || node.type === "OptionalCallExpression"; } isObjectProperty(node) { return node.type === "ObjectProperty"; } isObjectMethod(node) { return node.type === "ObjectMethod"; } initializeScopes(inModule = this.options.sourceType === "module") { const oldLabels = this.state.labels; this.state.labels = []; const oldExportedIdentifiers = this.state.exportedIdentifiers; this.state.exportedIdentifiers = []; const oldInModule = this.inModule; this.inModule = inModule; const oldScope = this.scope; const ScopeHandler = this.getScopeHandler(); this.scope = new ScopeHandler(this.raise.bind(this), this.inModule); const oldProdParam = this.prodParam; this.prodParam = new ProductionParameterHandler(); const oldClassScope = this.classScope; this.classScope = new ClassScopeHandler(this.raise.bind(this)); const oldExpressionScope = this.expressionScope; this.expressionScope = new ExpressionScopeHandler(this.raise.bind(this)); return () => { this.state.labels = oldLabels; this.state.exportedIdentifiers = oldExportedIdentifiers; this.inModule = oldInModule; this.scope = oldScope; this.prodParam = oldProdParam; this.classScope = oldClassScope; this.expressionScope = oldExpressionScope; }; } enterInitialScopes() { let paramFlags = PARAM; if (this.hasPlugin("topLevelAwait") && this.inModule) { paramFlags |= PARAM_AWAIT; } this.scope.enter(SCOPE_PROGRAM); this.prodParam.enter(paramFlags); } } class ExpressionErrors { constructor() { this.shorthandAssign = -1; this.doubleProto = -1; } } class Node { constructor(parser, pos, loc) { this.type = void 0; this.start = void 0; this.end = void 0; this.loc = void 0; this.range = void 0; this.leadingComments = void 0; this.trailingComments = void 0; this.innerComments = void 0; this.extra = void 0; this.type = ""; this.start = pos; this.end = 0; this.loc = new SourceLocation(loc); if (parser != null && parser.options.ranges) this.range = [pos, 0]; if (parser != null && parser.filename) this.loc.filename = parser.filename; } __clone() { const newNode = new Node(); const keys = Object.keys(this); for (let i = 0, length = keys.length; i < length; i++) { const key = keys[i]; if (key !== "leadingComments" && key !== "trailingComments" && key !== "innerComments") { newNode[key] = this[key]; } } return newNode; } } class NodeUtils extends UtilParser { startNode() { return new Node(this, this.state.start, this.state.startLoc); } startNodeAt(pos, loc) { return new Node(this, pos, loc); } startNodeAtNode(type) { return this.startNodeAt(type.start, type.loc.start); } finishNode(node, type) { return this.finishNodeAt(node, type, this.state.lastTokEnd, this.state.lastTokEndLoc); } finishNodeAt(node, type, pos, loc) { node.type = type; node.end = pos; node.loc.end = loc; if (this.options.ranges) node.range[1] = pos; this.processComment(node); return node; } resetStartLocation(node, start, startLoc) { node.start = start; node.loc.start = startLoc; if (this.options.ranges) node.range[0] = start; } resetEndLocation(node, end = this.state.lastTokEnd, endLoc = this.state.lastTokEndLoc) { node.end = end; node.loc.end = endLoc; if (this.options.ranges) node.range[1] = end; } resetStartLocationFromNode(node, locationNode) { this.resetStartLocation(node, locationNode.start, locationNode.loc.start); } } const unwrapParenthesizedExpression = node => { return node.type === "ParenthesizedExpression" ? unwrapParenthesizedExpression(node.expression) : node; }; class LValParser extends NodeUtils { toAssignable(node, isLHS = false) { var _node$extra, _node$extra3; let parenthesized = undefined; if (node.type === "ParenthesizedExpression" || (_node$extra = node.extra) != null && _node$extra.parenthesized) { parenthesized = unwrapParenthesizedExpression(node); if (isLHS) { if (parenthesized.type === "Identifier") { this.expressionScope.recordParenthesizedIdentifierError(node.start, ErrorMessages.InvalidParenthesizedAssignment); } else if (parenthesized.type !== "MemberExpression") { this.raise(node.start, ErrorMessages.InvalidParenthesizedAssignment); } } else { this.raise(node.start, ErrorMessages.InvalidParenthesizedAssignment); } } switch (node.type) { case "Identifier": case "ObjectPattern": case "ArrayPattern": case "AssignmentPattern": break; case "ObjectExpression": node.type = "ObjectPattern"; for (let i = 0, length = node.properties.length, last = length - 1; i < length; i++) { var _node$extra2; const prop = node.properties[i]; const isLast = i === last; this.toAssignableObjectExpressionProp(prop, isLast, isLHS); if (isLast && prop.type === "RestElement" && (_node$extra2 = node.extra) != null && _node$extra2.trailingComma) { this.raiseRestNotLast(node.extra.trailingComma); } } break; case "ObjectProperty": this.toAssignable(node.value, isLHS); break; case "SpreadElement": { this.checkToRestConversion(node); node.type = "RestElement"; const arg = node.argument; this.toAssignable(arg, isLHS); break; } case "ArrayExpression": node.type = "ArrayPattern"; this.toAssignableList(node.elements, (_node$extra3 = node.extra) == null ? void 0 : _node$extra3.trailingComma, isLHS); break; case "AssignmentExpression": if (node.operator !== "=") { this.raise(node.left.end, ErrorMessages.MissingEqInAssignment); } node.type = "AssignmentPattern"; delete node.operator; this.toAssignable(node.left, isLHS); break; case "ParenthesizedExpression": this.toAssignable(parenthesized, isLHS); break; } return node; } toAssignableObjectExpressionProp(prop, isLast, isLHS) { if (prop.type === "ObjectMethod") { const error = prop.kind === "get" || prop.kind === "set" ? ErrorMessages.PatternHasAccessor : ErrorMessages.PatternHasMethod; this.raise(prop.key.start, error); } else if (prop.type === "SpreadElement" && !isLast) { this.raiseRestNotLast(prop.start); } else { this.toAssignable(prop, isLHS); } } toAssignableList(exprList, trailingCommaPos, isLHS) { let end = exprList.length; if (end) { const last = exprList[end - 1]; if ((last == null ? void 0 : last.type) === "RestElement") { --end; } else if ((last == null ? void 0 : last.type) === "SpreadElement") { last.type = "RestElement"; let arg = last.argument; this.toAssignable(arg, isLHS); arg = unwrapParenthesizedExpression(arg); if (arg.type !== "Identifier" && arg.type !== "MemberExpression" && arg.type !== "ArrayPattern" && arg.type !== "ObjectPattern") { this.unexpected(arg.start); } if (trailingCommaPos) { this.raiseTrailingCommaAfterRest(trailingCommaPos); } --end; } } for (let i = 0; i < end; i++) { const elt = exprList[i]; if (elt) { this.toAssignable(elt, isLHS); if (elt.type === "RestElement") { this.raiseRestNotLast(elt.start); } } } return exprList; } toReferencedList(exprList, isParenthesizedExpr) { return exprList; } toReferencedListDeep(exprList, isParenthesizedExpr) { this.toReferencedList(exprList, isParenthesizedExpr); for (const expr of exprList) { if ((expr == null ? void 0 : expr.type) === "ArrayExpression") { this.toReferencedListDeep(expr.elements); } } } parseSpread(refExpressionErrors, refNeedsArrowPos) { const node = this.startNode(); this.next(); node.argument = this.parseMaybeAssignAllowIn(refExpressionErrors, undefined, refNeedsArrowPos); return this.finishNode(node, "SpreadElement"); } parseRestBinding() { const node = this.startNode(); this.next(); node.argument = this.parseBindingAtom(); return this.finishNode(node, "RestElement"); } parseBindingAtom() { switch (this.state.type) { case types.bracketL: { const node = this.startNode(); this.next(); node.elements = this.parseBindingList(types.bracketR, 93, true); return this.finishNode(node, "ArrayPattern"); } case types.braceL: return this.parseObjectLike(types.braceR, true); } return this.parseIdentifier(); } parseBindingList(close, closeCharCode, allowEmpty, allowModifiers) { const elts = []; let first = true; while (!this.eat(close)) { if (first) { first = false; } else { this.expect(types.comma); } if (allowEmpty && this.match(types.comma)) { elts.push(null); } else if (this.eat(close)) { break; } else if (this.match(types.ellipsis)) { elts.push(this.parseAssignableListItemTypes(this.parseRestBinding())); this.checkCommaAfterRest(closeCharCode); this.expect(close); break; } else { const decorators = []; if (this.match(types.at) && this.hasPlugin("decorators")) { this.raise(this.state.start, ErrorMessages.UnsupportedParameterDecorator); } while (this.match(types.at)) { decorators.push(this.parseDecorator()); } elts.push(this.parseAssignableListItem(allowModifiers, decorators)); } } return elts; } parseAssignableListItem(allowModifiers, decorators) { const left = this.parseMaybeDefault(); this.parseAssignableListItemTypes(left); const elt = this.parseMaybeDefault(left.start, left.loc.start, left); if (decorators.length) { left.decorators = decorators; } return elt; } parseAssignableListItemTypes(param) { return param; } parseMaybeDefault(startPos, startLoc, left) { var _startLoc, _startPos, _left; startLoc = (_startLoc = startLoc) != null ? _startLoc : this.state.startLoc; startPos = (_startPos = startPos) != null ? _startPos : this.state.start; left = (_left = left) != null ? _left : this.parseBindingAtom(); if (!this.eat(types.eq)) return left; const node = this.startNodeAt(startPos, startLoc); node.left = left; node.right = this.parseMaybeAssignAllowIn(); return this.finishNode(node, "AssignmentPattern"); } checkLVal(expr, contextDescription, bindingType = BIND_NONE, checkClashes, disallowLetBinding, strictModeChanged = false) { switch (expr.type) { case "Identifier": { const { name } = expr; if (this.state.strict && (strictModeChanged ? isStrictBindReservedWord(name, this.inModule) : isStrictBindOnlyReservedWord(name))) { this.raise(expr.start, bindingType === BIND_NONE ? ErrorMessages.StrictEvalArguments : ErrorMessages.StrictEvalArgumentsBinding, name); } if (checkClashes) { if (checkClashes.has(name)) { this.raise(expr.start, ErrorMessages.ParamDupe); } else { checkClashes.add(name); } } if (disallowLetBinding && name === "let") { this.raise(expr.start, ErrorMessages.LetInLexicalBinding); } if (!(bindingType & BIND_NONE)) { this.scope.declareName(name, bindingType, expr.start); } break; } case "MemberExpression": if (bindingType !== BIND_NONE) { this.raise(expr.start, ErrorMessages.InvalidPropertyBindingPattern); } break; case "ObjectPattern": for (let prop of expr.properties) { if (this.isObjectProperty(prop)) prop = prop.value;else if (this.isObjectMethod(prop)) continue; this.checkLVal(prop, "object destructuring pattern", bindingType, checkClashes, disallowLetBinding); } break; case "ArrayPattern": for (const elem of expr.elements) { if (elem) { this.checkLVal(elem, "array destructuring pattern", bindingType, checkClashes, disallowLetBinding); } } break; case "AssignmentPattern": this.checkLVal(expr.left, "assignment pattern", bindingType, checkClashes); break; case "RestElement": this.checkLVal(expr.argument, "rest element", bindingType, checkClashes); break; case "ParenthesizedExpression": this.checkLVal(expr.expression, "parenthesized expression", bindingType, checkClashes); break; default: { this.raise(expr.start, bindingType === BIND_NONE ? ErrorMessages.InvalidLhs : ErrorMessages.InvalidLhsBinding, contextDescription); } } } checkToRestConversion(node) { if (node.argument.type !== "Identifier" && node.argument.type !== "MemberExpression") { this.raise(node.argument.start, ErrorMessages.InvalidRestAssignmentPattern); } } checkCommaAfterRest(close) { if (this.match(types.comma)) { if (this.lookaheadCharCode() === close) { this.raiseTrailingCommaAfterRest(this.state.start); } else { this.raiseRestNotLast(this.state.start); } } } raiseRestNotLast(pos) { throw this.raise(pos, ErrorMessages.ElementAfterRest); } raiseTrailingCommaAfterRest(pos) { this.raise(pos, ErrorMessages.RestTrailingComma); } } class ExpressionParser extends LValParser { checkProto(prop, isRecord, protoRef, refExpressionErrors) { if (prop.type === "SpreadElement" || this.isObjectMethod(prop) || prop.computed || prop.shorthand) { return; } const key = prop.key; const name = key.type === "Identifier" ? key.name : key.value; if (name === "__proto__") { if (isRecord) { this.raise(key.start, ErrorMessages.RecordNoProto); return; } if (protoRef.used) { if (refExpressionErrors) { if (refExpressionErrors.doubleProto === -1) { refExpressionErrors.doubleProto = key.start; } } else { this.raise(key.start, ErrorMessages.DuplicateProto); } } protoRef.used = true; } } shouldExitDescending(expr, potentialArrowAt) { return expr.type === "ArrowFunctionExpression" && expr.start === potentialArrowAt; } getExpression() { let paramFlags = PARAM; if (this.hasPlugin("topLevelAwait") && this.inModule) { paramFlags |= PARAM_AWAIT; } this.scope.enter(SCOPE_PROGRAM); this.prodParam.enter(paramFlags); this.nextToken(); const expr = this.parseExpression(); if (!this.match(types.eof)) { this.unexpected(); } expr.comments = this.state.comments; expr.errors = this.state.errors; if (this.options.tokens) { expr.tokens = this.tokens; } return expr; } parseExpression(disallowIn, refExpressionErrors) { if (disallowIn) { return this.disallowInAnd(() => this.parseExpressionBase(refExpressionErrors)); } return this.allowInAnd(() => this.parseExpressionBase(refExpressionErrors)); } parseExpressionBase(refExpressionErrors) { const startPos = this.state.start; const startLoc = this.state.startLoc; const expr = this.parseMaybeAssign(refExpressionErrors); if (this.match(types.comma)) { const node = this.startNodeAt(startPos, startLoc); node.expressions = [expr]; while (this.eat(types.comma)) { node.expressions.push(this.parseMaybeAssign(refExpressionErrors)); } this.toReferencedList(node.expressions); return this.finishNode(node, "SequenceExpression"); } return expr; } parseMaybeAssignDisallowIn(refExpressionErrors, afterLeftParse, refNeedsArrowPos) { return this.disallowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse, refNeedsArrowPos)); } parseMaybeAssignAllowIn(refExpressionErrors, afterLeftParse, refNeedsArrowPos) { return this.allowInAnd(() => this.parseMaybeAssign(refExpressionErrors, afterLeftParse, refNeedsArrowPos)); } parseMaybeAssign(refExpressionErrors, afterLeftParse, refNeedsArrowPos) { const startPos = this.state.start; const startLoc = this.state.startLoc; if (this.isContextual("yield")) { if (this.prodParam.hasYield) { this.state.exprAllowed = true; let left = this.parseYield(); if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); } return left; } } let ownExpressionErrors; if (refExpressionErrors) { ownExpressionErrors = false; } else { refExpressionErrors = new ExpressionErrors(); ownExpressionErrors = true; } if (this.match(types.parenL) || this.match(types.name)) { this.state.potentialArrowAt = this.state.start; } let left = this.parseMaybeConditional(refExpressionErrors, refNeedsArrowPos); if (afterLeftParse) { left = afterLeftParse.call(this, left, startPos, startLoc); } if (this.state.type.isAssign) { const node = this.startNodeAt(startPos, startLoc); const operator = this.state.value; node.operator = operator; if (this.match(types.eq)) { node.left = this.toAssignable(left, true); refExpressionErrors.doubleProto = -1; } else { node.left = left; } if (refExpressionErrors.shorthandAssign >= node.left.start) { refExpressionErrors.shorthandAssign = -1; } this.checkLVal(left, "assignment expression"); this.next(); node.right = this.parseMaybeAssign(); return this.finishNode(node, "AssignmentExpression"); } else if (ownExpressionErrors) { this.checkExpressionErrors(refExpressionErrors, true); } return left; } parseMaybeConditional(refExpressionErrors, refNeedsArrowPos) { const startPos = this.state.start; const startLoc = this.state.startLoc; const potentialArrowAt = this.state.potentialArrowAt; const expr = this.parseExprOps(refExpressionErrors); if (this.shouldExitDescending(expr, potentialArrowAt)) { return expr; } return this.parseConditional(expr, startPos, startLoc, refNeedsArrowPos); } parseConditional(expr, startPos, startLoc, refNeedsArrowPos) { if (this.eat(types.question)) { const node = this.startNodeAt(startPos, startLoc); node.test = expr; node.consequent = this.parseMaybeAssignAllowIn(); this.expect(types.colon); node.alternate = this.parseMaybeAssign(); return this.finishNode(node, "ConditionalExpression"); } return expr; } parseExprOps(refExpressionErrors) { const startPos = this.state.start; const startLoc = this.state.startLoc; const potentialArrowAt = this.state.potentialArrowAt; const expr = this.parseMaybeUnary(refExpressionErrors); if (this.shouldExitDescending(expr, potentialArrowAt)) { return expr; } return this.parseExprOp(expr, startPos, startLoc, -1); } parseExprOp(left, leftStartPos, leftStartLoc, minPrec) { let prec = this.state.type.binop; if (prec != null && (this.prodParam.hasIn || !this.match(types._in))) { if (prec > minPrec) { const op = this.state.type; if (op === types.pipeline) { this.expectPlugin("pipelineOperator"); if (this.state.inFSharpPipelineDirectBody) { return left; } this.state.inPipeline = true; this.checkPipelineAtInfixOperator(left, leftStartPos); } const node = this.startNodeAt(leftStartPos, leftStartLoc); node.left = left; node.operator = this.state.value; if (op === types.exponent && left.type === "UnaryExpression" && (this.options.createParenthesizedExpressions || !(left.extra && left.extra.parenthesized))) { this.raise(left.argument.start, ErrorMessages.UnexpectedTokenUnaryExponentiation); } const logical = op === types.logicalOR || op === types.logicalAND; const coalesce = op === types.nullishCoalescing; if (coalesce) { prec = types.logicalAND.binop; } this.next(); if (op === types.pipeline && this.getPluginOption("pipelineOperator", "proposal") === "minimal") { if (this.match(types.name) && this.state.value === "await" && this.prodParam.hasAwait) { throw this.raise(this.state.start, ErrorMessages.UnexpectedAwaitAfterPipelineBody); } } node.right = this.parseExprOpRightExpr(op, prec); this.finishNode(node, logical || coalesce ? "LogicalExpression" : "BinaryExpression"); const nextOp = this.state.type; if (coalesce && (nextOp === types.logicalOR || nextOp === types.logicalAND) || logical && nextOp === types.nullishCoalescing) { throw this.raise(this.state.start, ErrorMessages.MixingCoalesceWithLogical); } return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec); } } return left; } parseExprOpRightExpr(op, prec) { const startPos = this.state.start; const startLoc = this.state.startLoc; switch (op) { case types.pipeline: switch (this.getPluginOption("pipelineOperator", "proposal")) { case "smart": return this.withTopicPermittingContext(() => { return this.parseSmartPipelineBody(this.parseExprOpBaseRightExpr(op, prec), startPos, startLoc); }); case "fsharp": return this.withSoloAwaitPermittingContext(() => { return this.parseFSharpPipelineBody(prec); }); } default: return this.parseExprOpBaseRightExpr(op, prec); } } parseExprOpBaseRightExpr(op, prec) { const startPos = this.state.start; const startLoc = this.state.startLoc; return this.parseExprOp(this.parseMaybeUnary(), startPos, startLoc, op.rightAssociative ? prec - 1 : prec); } parseMaybeUnary(refExpressionErrors) { const startPos = this.state.start; const startLoc = this.state.startLoc; const isAwait = this.isContextual("await"); if (isAwait && this.isAwaitAllowed()) { this.next(); return this.parseAwait(startPos, startLoc); } if (this.isContextual("module") && this.lookaheadCharCode() === 123 && !this.hasFollowingLineBreak()) { return this.parseModuleExpression(); } const update = this.match(types.incDec); const node = this.startNode(); if (this.state.type.prefix) { node.operator = this.state.value; node.prefix = true; if (this.match(types._throw)) { this.expectPlugin("throwExpressions"); } const isDelete = this.match(types._delete); this.next(); node.argument = this.parseMaybeUnary(); this.checkExpressionErrors(refExpressionErrors, true); if (this.state.strict && isDelete) { const arg = node.argument; if (arg.type === "Identifier") { this.raise(node.start, ErrorMessages.StrictDelete); } else if (this.hasPropertyAsPrivateName(arg)) { this.raise(node.start, ErrorMessages.DeletePrivateField); } } if (!update) { return this.finishNode(node, "UnaryExpression"); } } const expr = this.parseUpdate(node, update, refExpressionErrors); if (isAwait) { const startsExpr = this.hasPlugin("v8intrinsic") ? this.state.type.startsExpr : this.state.type.startsExpr && !this.match(types.modulo); if (startsExpr && !this.isAmbiguousAwait()) { this.raiseOverwrite(startPos, this.hasPlugin("topLevelAwait") ? ErrorMessages.AwaitNotInAsyncContext : ErrorMessages.AwaitNotInAsyncFunction); return this.parseAwait(startPos, startLoc); } } return expr; } parseUpdate(node, update, refExpressionErrors) { if (update) { this.checkLVal(node.argument, "prefix operation"); return this.finishNode(node, "UpdateExpression"); } const startPos = this.state.start; const startLoc = this.state.startLoc; let expr = this.parseExprSubscripts(refExpressionErrors); if (this.checkExpressionErrors(refExpressionErrors, false)) return expr; while (this.state.type.postfix && !this.canInsertSemicolon()) { const node = this.startNodeAt(startPos, startLoc); node.operator = this.state.value; node.prefix = false; node.argument = expr; this.checkLVal(expr, "postfix operation"); this.next(); expr = this.finishNode(node, "UpdateExpression"); } return expr; } parseExprSubscripts(refExpressionErrors) { const startPos = this.state.start; const startLoc = this.state.startLoc; const potentialArrowAt = this.state.potentialArrowAt; const expr = this.parseExprAtom(refExpressionErrors); if (this.shouldExitDescending(expr, potentialArrowAt)) { return expr; } return this.parseSubscripts(expr, startPos, startLoc); } parseSubscripts(base, startPos, startLoc, noCalls) { const state = { optionalChainMember: false, maybeAsyncArrow: this.atPossibleAsyncArrow(base), stop: false }; do { base = this.parseSubscript(base, startPos, startLoc, noCalls, state); state.maybeAsyncArrow = false; } while (!state.stop); return base; } parseSubscript(base, startPos, startLoc, noCalls, state) { if (!noCalls && this.eat(types.doubleColon)) { return this.parseBind(base, startPos, startLoc, noCalls, state); } else if (this.match(types.backQuote)) { return this.parseTaggedTemplateExpression(base, startPos, startLoc, state); } let optional = false; if (this.match(types.questionDot)) { if (noCalls && this.lookaheadCharCode() === 40) { state.stop = true; return base; } state.optionalChainMember = optional = true; this.next(); } if (!noCalls && this.match(types.parenL)) { return this.parseCoverCallAndAsyncArrowHead(base, startPos, startLoc, state, optional); } else if (optional || this.match(types.bracketL) || this.eat(types.dot)) { return this.parseMember(base, startPos, startLoc, state, optional); } else { state.stop = true; return base; } } parseMember(base, startPos, startLoc, state, optional) { const node = this.startNodeAt(startPos, startLoc); const computed = this.eat(types.bracketL); node.object = base; node.computed = computed; const property = computed ? this.parseExpression() : this.parseMaybePrivateName(true); if (this.isPrivateName(property)) { if (node.object.type === "Super") { this.raise(startPos, ErrorMessages.SuperPrivateField); } this.classScope.usePrivateName(this.getPrivateNameSV(property), property.start); } node.property = property; if (computed) { this.expect(types.bracketR); } if (state.optionalChainMember) { node.optional = optional; return this.finishNode(node, "OptionalMemberExpression"); } else { return this.finishNode(node, "MemberExpression"); } } parseBind(base, startPos, startLoc, noCalls, state) { const node = this.startNodeAt(startPos, startLoc); node.object = base; node.callee = this.parseNoCallExpr(); state.stop = true; return this.parseSubscripts(this.finishNode(node, "BindExpression"), startPos, startLoc, noCalls); } parseCoverCallAndAsyncArrowHead(base, startPos, startLoc, state, optional) { const oldMaybeInArrowParameters = this.state.maybeInArrowParameters; this.state.maybeInArrowParameters = true; this.next(); let node = this.startNodeAt(startPos, startLoc); node.callee = base; if (state.maybeAsyncArrow) { this.expressionScope.enter(newAsyncArrowScope()); } if (state.optionalChainMember) { node.optional = optional; } if (optional) { node.arguments = this.parseCallExpressionArguments(types.parenR, false); } else { node.arguments = this.parseCallExpressionArguments(types.parenR, state.maybeAsyncArrow, base.type === "Import", base.type !== "Super", node); } this.finishCallExpression(node, state.optionalChainMember); if (state.maybeAsyncArrow && this.shouldParseAsyncArrow() && !optional) { state.stop = true; this.expressionScope.validateAsPattern(); this.expressionScope.exit(); node = this.parseAsyncArrowFromCallExpression(this.startNodeAt(startPos, startLoc), node); } else { if (state.maybeAsyncArrow) { this.expressionScope.exit(); } this.toReferencedArguments(node); } this.state.maybeInArrowParameters = oldMaybeInArrowParameters; return node; } toReferencedArguments(node, isParenthesizedExpr) { this.toReferencedListDeep(node.arguments, isParenthesizedExpr); } parseTaggedTemplateExpression(base, startPos, startLoc, state) { const node = this.startNodeAt(startPos, startLoc); node.tag = base; node.quasi = this.parseTemplate(true); if (state.optionalChainMember) { this.raise(startPos, ErrorMessages.OptionalChainingNoTemplate); } return this.finishNode(node, "TaggedTemplateExpression"); } atPossibleAsyncArrow(base) { return base.type === "Identifier" && base.name === "async" && this.state.lastTokEnd === base.end && !this.canInsertSemicolon() && base.end - base.start === 5 && base.start === this.state.potentialArrowAt; } finishCallExpression(node, optional) { if (node.callee.type === "Import") { if (node.arguments.length === 2) { if (!this.hasPlugin("moduleAttributes")) { this.expectPlugin("importAssertions"); } } if (node.arguments.length === 0 || node.arguments.length > 2) { this.raise(node.start, ErrorMessages.ImportCallArity, this.hasPlugin("importAssertions") || this.hasPlugin("moduleAttributes") ? "one or two arguments" : "one argument"); } else { for (const arg of node.arguments) { if (arg.type === "SpreadElement") { this.raise(arg.start, ErrorMessages.ImportCallSpreadArgument); } } } } return this.finishNode(node, optional ? "OptionalCallExpression" : "CallExpression"); } parseCallExpressionArguments(close, possibleAsyncArrow, dynamicImport, allowPlaceholder, nodeForExtra) { const elts = []; let first = true; const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody; this.state.inFSharpPipelineDirectBody = false; while (!this.eat(close)) { if (first) { first = false; } else { this.expect(types.comma); if (this.match(close)) { if (dynamicImport && !this.hasPlugin("importAssertions") && !this.hasPlugin("moduleAttributes")) { this.raise(this.state.lastTokStart, ErrorMessages.ImportCallArgumentTrailingComma); } if (nodeForExtra) { this.addExtra(nodeForExtra, "trailingComma", this.state.lastTokStart); } this.next(); break; } } elts.push(this.parseExprListItem(false, possibleAsyncArrow ? new ExpressionErrors() : undefined, possibleAsyncArrow ? { start: 0 } : undefined, allowPlaceholder)); } this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody; return elts; } shouldParseAsyncArrow() { return this.match(types.arrow) && !this.canInsertSemicolon(); } parseAsyncArrowFromCallExpression(node, call) { var _call$extra; this.expect(types.arrow); this.parseArrowExpression(node, call.arguments, true, (_call$extra = call.extra) == null ? void 0 : _call$extra.trailingComma); return node; } parseNoCallExpr() { const startPos = this.state.start; const startLoc = this.state.startLoc; return this.parseSubscripts(this.parseExprAtom(), startPos, startLoc, true); } parseExprAtom(refExpressionErrors) { if (this.state.type === types.slash) this.readRegexp(); const canBeArrow = this.state.potentialArrowAt === this.state.start; let node; switch (this.state.type) { case types._super: return this.parseSuper(); case types._import: node = this.startNode(); this.next(); if (this.match(types.dot)) { return this.parseImportMetaProperty(node); } if (!this.match(types.parenL)) { this.raise(this.state.lastTokStart, ErrorMessages.UnsupportedImport); } return this.finishNode(node, "Import"); case types._this: node = this.startNode(); this.next(); return this.finishNode(node, "ThisExpression"); case types.name: { const containsEsc = this.state.containsEsc; const id = this.parseIdentifier(); if (!containsEsc && id.name === "async" && !this.canInsertSemicolon()) { if (this.match(types._function)) { const last = this.state.context.length - 1; if (this.state.context[last] !== types$1.functionStatement) { throw new Error("Internal error"); } this.state.context[last] = types$1.functionExpression; this.next(); return this.parseFunction(this.startNodeAtNode(id), undefined, true); } else if (this.match(types.name)) { return this.parseAsyncArrowUnaryFunction(id); } } if (canBeArrow && this.match(types.arrow) && !this.canInsertSemicolon()) { this.next(); return this.parseArrowExpression(this.startNodeAtNode(id), [id], false); } return id; } case types._do: { return this.parseDo(); } case types.regexp: { const value = this.state.value; node = this.parseLiteral(value.value, "RegExpLiteral"); node.pattern = value.pattern; node.flags = value.flags; return node; } case types.num: return this.parseLiteral(this.state.value, "NumericLiteral"); case types.bigint: return this.parseLiteral(this.state.value, "BigIntLiteral"); case types.decimal: return this.parseLiteral(this.state.value, "DecimalLiteral"); case types.string: return this.parseLiteral(this.state.value, "StringLiteral"); case types._null: node = this.startNode(); this.next(); return this.finishNode(node, "NullLiteral"); case types._true: case types._false: return this.parseBooleanLiteral(); case types.parenL: return this.parseParenAndDistinguishExpression(canBeArrow); case types.bracketBarL: case types.bracketHashL: { return this.parseArrayLike(this.state.type === types.bracketBarL ? types.bracketBarR : types.bracketR, false, true, refExpressionErrors); } case types.bracketL: { return this.parseArrayLike(types.bracketR, true, false, refExpressionErrors); } case types.braceBarL: case types.braceHashL: { return this.parseObjectLike(this.state.type === types.braceBarL ? types.braceBarR : types.braceR, false, true, refExpressionErrors); } case types.braceL: { return this.parseObjectLike(types.braceR, false, false, refExpressionErrors); } case types._function: return this.parseFunctionOrFunctionSent(); case types.at: this.parseDecorators(); case types._class: node = this.startNode(); this.takeDecorators(node); return this.parseClass(node, false); case types._new: return this.parseNewOrNewTarget(); case types.backQuote: return this.parseTemplate(false); case types.doubleColon: { node = this.startNode(); this.next(); node.object = null; const callee = node.callee = this.parseNoCallExpr(); if (callee.type === "MemberExpression") { return this.finishNode(node, "BindExpression"); } else { throw this.raise(callee.start, ErrorMessages.UnsupportedBind); } } case types.hash: { if (this.state.inPipeline) { node = this.startNode(); if (this.getPluginOption("pipelineOperator", "proposal") !== "smart") { this.raise(node.start, ErrorMessages.PrimaryTopicRequiresSmartPipeline); } this.next(); if (!this.primaryTopicReferenceIsAllowedInCurrentTopicContext()) { this.raise(node.start, ErrorMessages.PrimaryTopicNotAllowed); } this.registerTopicReference(); return this.finishNode(node, "PipelinePrimaryTopicReference"); } const nextCh = this.input.codePointAt(this.state.end); if (isIdentifierStart(nextCh) || nextCh === 92) { const start = this.state.start; node = this.parseMaybePrivateName(true); if (this.match(types._in)) { this.expectPlugin("privateIn"); this.classScope.usePrivateName(this.getPrivateNameSV(node), node.start); } else if (this.hasPlugin("privateIn")) { this.raise(this.state.start, ErrorMessages.PrivateInExpectedIn, this.getPrivateNameSV(node)); } else { throw this.unexpected(start); } return node; } } case types.relational: { if (this.state.value === "<") { const lookaheadCh = this.input.codePointAt(this.nextTokenStart()); if (isIdentifierStart(lookaheadCh) || lookaheadCh === 62) { this.expectOnePlugin(["jsx", "flow", "typescript"]); } } } default: throw this.unexpected(); } } parseAsyncArrowUnaryFunction(id) { const node = this.startNodeAtNode(id); this.prodParam.enter(functionFlags(true, this.prodParam.hasYield)); const params = [this.parseIdentifier()]; this.prodParam.exit(); if (this.hasPrecedingLineBreak()) { this.raise(this.state.pos, ErrorMessages.LineTerminatorBeforeArrow); } this.expect(types.arrow); this.parseArrowExpression(node, params, true); return node; } parseDo() { this.expectPlugin("doExpressions"); const node = this.startNode(); this.next(); const oldLabels = this.state.labels; this.state.labels = []; node.body = this.parseBlock(); this.state.labels = oldLabels; return this.finishNode(node, "DoExpression"); } parseSuper() { const node = this.startNode(); this.next(); if (this.match(types.parenL) && !this.scope.allowDirectSuper && !this.options.allowSuperOutsideMethod) { this.raise(node.start, ErrorMessages.SuperNotAllowed); } else if (!this.scope.allowSuper && !this.options.allowSuperOutsideMethod) { this.raise(node.start, ErrorMessages.UnexpectedSuper); } if (!this.match(types.parenL) && !this.match(types.bracketL) && !this.match(types.dot)) { this.raise(node.start, ErrorMessages.UnsupportedSuper); } return this.finishNode(node, "Super"); } parseBooleanLiteral() { const node = this.startNode(); node.value = this.match(types._true); this.next(); return this.finishNode(node, "BooleanLiteral"); } parseMaybePrivateName(isPrivateNameAllowed) { const isPrivate = this.match(types.hash); if (isPrivate) { this.expectOnePlugin(["classPrivateProperties", "classPrivateMethods"]); if (!isPrivateNameAllowed) { this.raise(this.state.pos, ErrorMessages.UnexpectedPrivateField); } const node = this.startNode(); this.next(); this.assertNoSpace("Unexpected space between # and identifier"); node.id = this.parseIdentifier(true); return this.finishNode(node, "PrivateName"); } else { return this.parseIdentifier(true); } } parseFunctionOrFunctionSent() { const node = this.startNode(); this.next(); if (this.prodParam.hasYield && this.match(types.dot)) { const meta = this.createIdentifier(this.startNodeAtNode(node), "function"); this.next(); return this.parseMetaProperty(node, meta, "sent"); } return this.parseFunction(node); } parseMetaProperty(node, meta, propertyName) { node.meta = meta; if (meta.name === "function" && propertyName === "sent") { if (this.isContextual(propertyName)) { this.expectPlugin("functionSent"); } else if (!this.hasPlugin("functionSent")) { this.unexpected(); } } const containsEsc = this.state.containsEsc; node.property = this.parseIdentifier(true); if (node.property.name !== propertyName || containsEsc) { this.raise(node.property.start, ErrorMessages.UnsupportedMetaProperty, meta.name, propertyName); } return this.finishNode(node, "MetaProperty"); } parseImportMetaProperty(node) { const id = this.createIdentifier(this.startNodeAtNode(node), "import"); this.next(); if (this.isContextual("meta")) { if (!this.inModule) { this.raiseWithData(id.start, { code: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED" }, ErrorMessages.ImportMetaOutsideModule); } this.sawUnambiguousESM = true; } return this.parseMetaProperty(node, id, "meta"); } parseLiteral(value, type, startPos, startLoc) { startPos = startPos || this.state.start; startLoc = startLoc || this.state.startLoc; const node = this.startNodeAt(startPos, startLoc); this.addExtra(node, "rawValue", value); this.addExtra(node, "raw", this.input.slice(startPos, this.state.end)); node.value = value; this.next(); return this.finishNode(node, type); } parseParenAndDistinguishExpression(canBeArrow) { const startPos = this.state.start; const startLoc = this.state.startLoc; let val; this.next(); this.expressionScope.enter(newArrowHeadScope()); const oldMaybeInArrowParameters = this.state.maybeInArrowParameters; const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody; this.state.maybeInArrowParameters = true; this.state.inFSharpPipelineDirectBody = false; const innerStartPos = this.state.start; const innerStartLoc = this.state.startLoc; const exprList = []; const refExpressionErrors = new ExpressionErrors(); const refNeedsArrowPos = { start: 0 }; let first = true; let spreadStart; let optionalCommaStart; while (!this.match(types.parenR)) { if (first) { first = false; } else { this.expect(types.comma, refNeedsArrowPos.start || null); if (this.match(types.parenR)) { optionalCommaStart = this.state.start; break; } } if (this.match(types.ellipsis)) { const spreadNodeStartPos = this.state.start; const spreadNodeStartLoc = this.state.startLoc; spreadStart = this.state.start; exprList.push(this.parseParenItem(this.parseRestBinding(), spreadNodeStartPos, spreadNodeStartLoc)); this.checkCommaAfterRest(41); break; } else { exprList.push(this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem, refNeedsArrowPos)); } } const innerEndPos = this.state.lastTokEnd; const innerEndLoc = this.state.lastTokEndLoc; this.expect(types.parenR); this.state.maybeInArrowParameters = oldMaybeInArrowParameters; this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody; let arrowNode = this.startNodeAt(startPos, startLoc); if (canBeArrow && this.shouldParseArrow() && (arrowNode = this.parseArrow(arrowNode))) { this.expressionScope.validateAsPattern(); this.expressionScope.exit(); this.parseArrowExpression(arrowNode, exprList, false); return arrowNode; } this.expressionScope.exit(); if (!exprList.length) { this.unexpected(this.state.lastTokStart); } if (optionalCommaStart) this.unexpected(optionalCommaStart); if (spreadStart) this.unexpected(spreadStart); this.checkExpressionErrors(refExpressionErrors, true); if (refNeedsArrowPos.start) this.unexpected(refNeedsArrowPos.start); this.toReferencedListDeep(exprList, true); if (exprList.length > 1) { val = this.startNodeAt(innerStartPos, innerStartLoc); val.expressions = exprList; this.finishNodeAt(val, "SequenceExpression", innerEndPos, innerEndLoc); } else { val = exprList[0]; } if (!this.options.createParenthesizedExpressions) { this.addExtra(val, "parenthesized", true); this.addExtra(val, "parenStart", startPos); return val; } const parenExpression = this.startNodeAt(startPos, startLoc); parenExpression.expression = val; this.finishNode(parenExpression, "ParenthesizedExpression"); return parenExpression; } shouldParseArrow() { return !this.canInsertSemicolon(); } parseArrow(node) { if (this.eat(types.arrow)) { return node; } } parseParenItem(node, startPos, startLoc) { return node; } parseNewOrNewTarget() { const node = this.startNode(); this.next(); if (this.match(types.dot)) { const meta = this.createIdentifier(this.startNodeAtNode(node), "new"); this.next(); const metaProp = this.parseMetaProperty(node, meta, "target"); if (!this.scope.inNonArrowFunction && !this.scope.inClass) { let error = ErrorMessages.UnexpectedNewTarget; if (this.hasPlugin("classProperties")) { error += " or class properties"; } this.raise(metaProp.start, error); } return metaProp; } return this.parseNew(node); } parseNew(node) { node.callee = this.parseNoCallExpr(); if (node.callee.type === "Import") { this.raise(node.callee.start, ErrorMessages.ImportCallNotNewExpression); } else if (this.isOptionalChain(node.callee)) { this.raise(this.state.lastTokEnd, ErrorMessages.OptionalChainingNoNew); } else if (this.eat(types.questionDot)) { this.raise(this.state.start, ErrorMessages.OptionalChainingNoNew); } this.parseNewArguments(node); return this.finishNode(node, "NewExpression"); } parseNewArguments(node) { if (this.eat(types.parenL)) { const args = this.parseExprList(types.parenR); this.toReferencedList(args); node.arguments = args; } else { node.arguments = []; } } parseTemplateElement(isTagged) { const elem = this.startNode(); if (this.state.value === null) { if (!isTagged) { this.raise(this.state.start + 1, ErrorMessages.InvalidEscapeSequenceTemplate); } } elem.value = { raw: this.input.slice(this.state.start, this.state.end).replace(/\r\n?/g, "\n"), cooked: this.state.value }; this.next(); elem.tail = this.match(types.backQuote); return this.finishNode(elem, "TemplateElement"); } parseTemplate(isTagged) { const node = this.startNode(); this.next(); node.expressions = []; let curElt = this.parseTemplateElement(isTagged); node.quasis = [curElt]; while (!curElt.tail) { this.expect(types.dollarBraceL); node.expressions.push(this.parseTemplateSubstitution()); this.expect(types.braceR); node.quasis.push(curElt = this.parseTemplateElement(isTagged)); } this.next(); return this.finishNode(node, "TemplateLiteral"); } parseTemplateSubstitution() { return this.parseExpression(); } parseObjectLike(close, isPattern, isRecord, refExpressionErrors) { if (isRecord) { this.expectPlugin("recordAndTuple"); } const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody; this.state.inFSharpPipelineDirectBody = false; const propHash = Object.create(null); let first = true; const node = this.startNode(); node.properties = []; this.next(); while (!this.match(close)) { if (first) { first = false; } else { this.expect(types.comma); if (this.match(close)) { this.addExtra(node, "trailingComma", this.state.lastTokStart); break; } } const prop = this.parsePropertyDefinition(isPattern, refExpressionErrors); if (!isPattern) { this.checkProto(prop, isRecord, propHash, refExpressionErrors); } if (isRecord && !this.isObjectProperty(prop) && prop.type !== "SpreadElement") { this.raise(prop.start, ErrorMessages.InvalidRecordProperty); } if (prop.shorthand) { this.addExtra(prop, "shorthand", true); } node.properties.push(prop); } this.state.exprAllowed = false; this.next(); this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody; let type = "ObjectExpression"; if (isPattern) { type = "ObjectPattern"; } else if (isRecord) { type = "RecordExpression"; } return this.finishNode(node, type); } maybeAsyncOrAccessorProp(prop) { return !prop.computed && prop.key.type === "Identifier" && (this.isLiteralPropertyName() || this.match(types.bracketL) || this.match(types.star)); } parsePropertyDefinition(isPattern, refExpressionErrors) { let decorators = []; if (this.match(types.at)) { if (this.hasPlugin("decorators")) { this.raise(this.state.start, ErrorMessages.UnsupportedPropertyDecorator); } while (this.match(types.at)) { decorators.push(this.parseDecorator()); } } const prop = this.startNode(); let isGenerator = false; let isAsync = false; let isAccessor = false; let startPos; let startLoc; if (this.match(types.ellipsis)) { if (decorators.length) this.unexpected(); if (isPattern) { this.next(); prop.argument = this.parseIdentifier(); this.checkCommaAfterRest(125); return this.finishNode(prop, "RestElement"); } return this.parseSpread(); } if (decorators.length) { prop.decorators = decorators; decorators = []; } prop.method = false; if (isPattern || refExpressionErrors) { startPos = this.state.start; startLoc = this.state.startLoc; } if (!isPattern) { isGenerator = this.eat(types.star); } const containsEsc = this.state.containsEsc; const key = this.parsePropertyName(prop, false); if (!isPattern && !isGenerator && !containsEsc && this.maybeAsyncOrAccessorProp(prop)) { const keyName = key.name; if (keyName === "async" && !this.hasPrecedingLineBreak()) { isAsync = true; isGenerator = this.eat(types.star); this.parsePropertyName(prop, false); } if (keyName === "get" || keyName === "set") { isAccessor = true; prop.kind = keyName; if (this.match(types.star)) { isGenerator = true; this.raise(this.state.pos, ErrorMessages.AccessorIsGenerator, keyName); this.next(); } this.parsePropertyName(prop, false); } } this.parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors); return prop; } getGetterSetterExpectedParamCount(method) { return method.kind === "get" ? 0 : 1; } getObjectOrClassMethodParams(method) { return method.params; } checkGetterSetterParams(method) { var _params; const paramCount = this.getGetterSetterExpectedParamCount(method); const params = this.getObjectOrClassMethodParams(method); const start = method.start; if (params.length !== paramCount) { if (method.kind === "get") { this.raise(start, ErrorMessages.BadGetterArity); } else { this.raise(start, ErrorMessages.BadSetterArity); } } if (method.kind === "set" && ((_params = params[params.length - 1]) == null ? void 0 : _params.type) === "RestElement") { this.raise(start, ErrorMessages.BadSetterRestParameter); } } parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) { if (isAccessor) { this.parseMethod(prop, isGenerator, false, false, false, "ObjectMethod"); this.checkGetterSetterParams(prop); return prop; } if (isAsync || isGenerator || this.match(types.parenL)) { if (isPattern) this.unexpected(); prop.kind = "method"; prop.method = true; return this.parseMethod(prop, isGenerator, isAsync, false, false, "ObjectMethod"); } } parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors) { prop.shorthand = false; if (this.eat(types.colon)) { prop.value = isPattern ? this.parseMaybeDefault(this.state.start, this.state.startLoc) : this.parseMaybeAssignAllowIn(refExpressionErrors); return this.finishNode(prop, "ObjectProperty"); } if (!prop.computed && prop.key.type === "Identifier") { this.checkReservedWord(prop.key.name, prop.key.start, true, false); if (isPattern) { prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone()); } else if (this.match(types.eq) && refExpressionErrors) { if (refExpressionErrors.shorthandAssign === -1) { refExpressionErrors.shorthandAssign = this.state.start; } prop.value = this.parseMaybeDefault(startPos, startLoc, prop.key.__clone()); } else { prop.value = prop.key.__clone(); } prop.shorthand = true; return this.finishNode(prop, "ObjectProperty"); } } parseObjPropValue(prop, startPos, startLoc, isGenerator, isAsync, isPattern, isAccessor, refExpressionErrors) { const node = this.parseObjectMethod(prop, isGenerator, isAsync, isPattern, isAccessor) || this.parseObjectProperty(prop, startPos, startLoc, isPattern, refExpressionErrors); if (!node) this.unexpected(); return node; } parsePropertyName(prop, isPrivateNameAllowed) { if (this.eat(types.bracketL)) { prop.computed = true; prop.key = this.parseMaybeAssignAllowIn(); this.expect(types.bracketR); } else { const oldInPropertyName = this.state.inPropertyName; this.state.inPropertyName = true; prop.key = this.match(types.num) || this.match(types.string) || this.match(types.bigint) || this.match(types.decimal) ? this.parseExprAtom() : this.parseMaybePrivateName(isPrivateNameAllowed); if (!this.isPrivateName(prop.key)) { prop.computed = false; } this.state.inPropertyName = oldInPropertyName; } return prop.key; } initFunction(node, isAsync) { node.id = null; node.generator = false; node.async = !!isAsync; } parseMethod(node, isGenerator, isAsync, isConstructor, allowDirectSuper, type, inClassScope = false) { this.initFunction(node, isAsync); node.generator = !!isGenerator; const allowModifiers = isConstructor; this.scope.enter(SCOPE_FUNCTION | SCOPE_SUPER | (inClassScope ? SCOPE_CLASS : 0) | (allowDirectSuper ? SCOPE_DIRECT_SUPER : 0)); this.prodParam.enter(functionFlags(isAsync, node.generator)); this.parseFunctionParams(node, allowModifiers); this.parseFunctionBodyAndFinish(node, type, true); this.prodParam.exit(); this.scope.exit(); return node; } parseArrayLike(close, canBePattern, isTuple, refExpressionErrors) { if (isTuple) { this.expectPlugin("recordAndTuple"); } const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody; this.state.inFSharpPipelineDirectBody = false; const node = this.startNode(); this.next(); node.elements = this.parseExprList(close, !isTuple, refExpressionErrors, node); this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody; return this.finishNode(node, isTuple ? "TupleExpression" : "ArrayExpression"); } parseArrowExpression(node, params, isAsync, trailingCommaPos) { this.scope.enter(SCOPE_FUNCTION | SCOPE_ARROW); let flags = functionFlags(isAsync, false); if (!this.match(types.bracketL) && this.prodParam.hasIn) { flags |= PARAM_IN; } this.prodParam.enter(flags); this.initFunction(node, isAsync); const oldMaybeInArrowParameters = this.state.maybeInArrowParameters; if (params) { this.state.maybeInArrowParameters = true; this.setArrowFunctionParameters(node, params, trailingCommaPos); } this.state.maybeInArrowParameters = false; this.parseFunctionBody(node, true); this.prodParam.exit(); this.scope.exit(); this.state.maybeInArrowParameters = oldMaybeInArrowParameters; return this.finishNode(node, "ArrowFunctionExpression"); } setArrowFunctionParameters(node, params, trailingCommaPos) { node.params = this.toAssignableList(params, trailingCommaPos, false); } parseFunctionBodyAndFinish(node, type, isMethod = false) { this.parseFunctionBody(node, false, isMethod); this.finishNode(node, type); } parseFunctionBody(node, allowExpression, isMethod = false) { const isExpression = allowExpression && !this.match(types.braceL); this.expressionScope.enter(newExpressionScope()); if (isExpression) { node.body = this.parseMaybeAssign(); this.checkParams(node, false, allowExpression, false); } else { const oldStrict = this.state.strict; const oldLabels = this.state.labels; this.state.labels = []; this.prodParam.enter(this.prodParam.currentFlags() | PARAM_RETURN); node.body = this.parseBlock(true, false, hasStrictModeDirective => { const nonSimple = !this.isSimpleParamList(node.params); if (hasStrictModeDirective && nonSimple) { const errorPos = (node.kind === "method" || node.kind === "constructor") && !!node.key ? node.key.end : node.start; this.raise(errorPos, ErrorMessages.IllegalLanguageModeDirective); } const strictModeChanged = !oldStrict && this.state.strict; this.checkParams(node, !this.state.strict && !allowExpression && !isMethod && !nonSimple, allowExpression, strictModeChanged); if (this.state.strict && node.id) { this.checkLVal(node.id, "function name", BIND_OUTSIDE, undefined, undefined, strictModeChanged); } }); this.prodParam.exit(); this.expressionScope.exit(); this.state.labels = oldLabels; } } isSimpleParamList(params) { for (let i = 0, len = params.length; i < len; i++) { if (params[i].type !== "Identifier") return false; } return true; } checkParams(node, allowDuplicates, isArrowFunction, strictModeChanged = true) { const checkClashes = new Set(); for (const param of node.params) { this.checkLVal(param, "function parameter list", BIND_VAR, allowDuplicates ? null : checkClashes, undefined, strictModeChanged); } } parseExprList(close, allowEmpty, refExpressionErrors, nodeForExtra) { const elts = []; let first = true; while (!this.eat(close)) { if (first) { first = false; } else { this.expect(types.comma); if (this.match(close)) { if (nodeForExtra) { this.addExtra(nodeForExtra, "trailingComma", this.state.lastTokStart); } this.next(); break; } } elts.push(this.parseExprListItem(allowEmpty, refExpressionErrors)); } return elts; } parseExprListItem(allowEmpty, refExpressionErrors, refNeedsArrowPos, allowPlaceholder) { let elt; if (this.match(types.comma)) { if (!allowEmpty) { this.raise(this.state.pos, ErrorMessages.UnexpectedToken, ","); } elt = null; } else if (this.match(types.ellipsis)) { const spreadNodeStartPos = this.state.start; const spreadNodeStartLoc = this.state.startLoc; elt = this.parseParenItem(this.parseSpread(refExpressionErrors, refNeedsArrowPos), spreadNodeStartPos, spreadNodeStartLoc); } else if (this.match(types.question)) { this.expectPlugin("partialApplication"); if (!allowPlaceholder) { this.raise(this.state.start, ErrorMessages.UnexpectedArgumentPlaceholder); } const node = this.startNode(); this.next(); elt = this.finishNode(node, "ArgumentPlaceholder"); } else { elt = this.parseMaybeAssignAllowIn(refExpressionErrors, this.parseParenItem, refNeedsArrowPos); } return elt; } parseIdentifier(liberal) { const node = this.startNode(); const name = this.parseIdentifierName(node.start, liberal); return this.createIdentifier(node, name); } createIdentifier(node, name) { node.name = name; node.loc.identifierName = name; return this.finishNode(node, "Identifier"); } parseIdentifierName(pos, liberal) { let name; const { start, type } = this.state; if (type === types.name) { name = this.state.value; } else if (type.keyword) { name = type.keyword; const curContext = this.curContext(); if ((type === types._class || type === types._function) && (curContext === types$1.functionStatement || curContext === types$1.functionExpression)) { this.state.context.pop(); } } else { throw this.unexpected(); } if (liberal) { this.state.type = types.name; } else { this.checkReservedWord(name, start, !!type.keyword, false); } this.next(); return name; } checkReservedWord(word, startLoc, checkKeywords, isBinding) { if (this.prodParam.hasYield && word === "yield") { this.raise(startLoc, ErrorMessages.YieldBindingIdentifier); return; } if (word === "await") { if (this.prodParam.hasAwait) { this.raise(startLoc, ErrorMessages.AwaitBindingIdentifier); return; } else if (this.scope.inStaticBlock && !this.scope.inNonArrowFunction) { this.raise(startLoc, ErrorMessages.AwaitBindingIdentifierInStaticBlock); return; } else { this.expressionScope.recordAsyncArrowParametersError(startLoc, ErrorMessages.AwaitBindingIdentifier); } } if (this.scope.inClass && !this.scope.inNonArrowFunction && word === "arguments") { this.raise(startLoc, ErrorMessages.ArgumentsInClass); return; } if (checkKeywords && isKeyword(word)) { this.raise(startLoc, ErrorMessages.UnexpectedKeyword, word); return; } const reservedTest = !this.state.strict ? isReservedWord : isBinding ? isStrictBindReservedWord : isStrictReservedWord; if (reservedTest(word, this.inModule)) { this.raise(startLoc, ErrorMessages.UnexpectedReservedWord, word); } } isAwaitAllowed() { if (this.prodParam.hasAwait) return true; if (this.options.allowAwaitOutsideFunction && !this.scope.inFunction) { return true; } return false; } parseAwait(startPos, startLoc) { const node = this.startNodeAt(startPos, startLoc); this.expressionScope.recordParameterInitializerError(node.start, ErrorMessages.AwaitExpressionFormalParameter); if (this.eat(types.star)) { this.raise(node.start, ErrorMessages.ObsoleteAwaitStar); } if (!this.scope.inFunction && !this.options.allowAwaitOutsideFunction) { if (this.isAmbiguousAwait()) { this.ambiguousScriptDifferentAst = true; } else { this.sawUnambiguousESM = true; } } if (!this.state.soloAwait) { node.argument = this.parseMaybeUnary(); } return this.finishNode(node, "AwaitExpression"); } isAmbiguousAwait() { return this.hasPrecedingLineBreak() || this.match(types.plusMin) || this.match(types.parenL) || this.match(types.bracketL) || this.match(types.backQuote) || this.match(types.regexp) || this.match(types.slash) || this.hasPlugin("v8intrinsic") && this.match(types.modulo); } parseYield() { const node = this.startNode(); this.expressionScope.recordParameterInitializerError(node.start, ErrorMessages.YieldInParameter); this.next(); if (this.match(types.semi) || !this.match(types.star) && !this.state.type.startsExpr || this.hasPrecedingLineBreak()) { node.delegate = false; node.argument = null; } else { node.delegate = this.eat(types.star); node.argument = this.parseMaybeAssign(); } return this.finishNode(node, "YieldExpression"); } checkPipelineAtInfixOperator(left, leftStartPos) { if (this.getPluginOption("pipelineOperator", "proposal") === "smart") { if (left.type === "SequenceExpression") { this.raise(leftStartPos, ErrorMessages.PipelineHeadSequenceExpression); } } } parseSmartPipelineBody(childExpression, startPos, startLoc) { this.checkSmartPipelineBodyEarlyErrors(childExpression, startPos); return this.parseSmartPipelineBodyInStyle(childExpression, startPos, startLoc); } checkSmartPipelineBodyEarlyErrors(childExpression, startPos) { if (this.match(types.arrow)) { throw this.raise(this.state.start, ErrorMessages.PipelineBodyNoArrow); } else if (childExpression.type === "SequenceExpression") { this.raise(startPos, ErrorMessages.PipelineBodySequenceExpression); } } parseSmartPipelineBodyInStyle(childExpression, startPos, startLoc) { const bodyNode = this.startNodeAt(startPos, startLoc); const isSimpleReference = this.isSimpleReference(childExpression); if (isSimpleReference) { bodyNode.callee = childExpression; } else { if (!this.topicReferenceWasUsedInCurrentTopicContext()) { this.raise(startPos, ErrorMessages.PipelineTopicUnused); } bodyNode.expression = childExpression; } return this.finishNode(bodyNode, isSimpleReference ? "PipelineBareFunction" : "PipelineTopicExpression"); } isSimpleReference(expression) { switch (expression.type) { case "MemberExpression": return !expression.computed && this.isSimpleReference(expression.object); case "Identifier": return true; default: return false; } } withTopicPermittingContext(callback) { const outerContextTopicState = this.state.topicContext; this.state.topicContext = { maxNumOfResolvableTopics: 1, maxTopicIndex: null }; try { return callback(); } finally { this.state.topicContext = outerContextTopicState; } } withTopicForbiddingContext(callback) { const outerContextTopicState = this.state.topicContext; this.state.topicContext = { maxNumOfResolvableTopics: 0, maxTopicIndex: null }; try { return callback(); } finally { this.state.topicContext = outerContextTopicState; } } withSoloAwaitPermittingContext(callback) { const outerContextSoloAwaitState = this.state.soloAwait; this.state.soloAwait = true; try { return callback(); } finally { this.state.soloAwait = outerContextSoloAwaitState; } } allowInAnd(callback) { const flags = this.prodParam.currentFlags(); const prodParamToSet = PARAM_IN & ~flags; if (prodParamToSet) { this.prodParam.enter(flags | PARAM_IN); try { return callback(); } finally { this.prodParam.exit(); } } return callback(); } disallowInAnd(callback) { const flags = this.prodParam.currentFlags(); const prodParamToClear = PARAM_IN & flags; if (prodParamToClear) { this.prodParam.enter(flags & ~PARAM_IN); try { return callback(); } finally { this.prodParam.exit(); } } return callback(); } registerTopicReference() { this.state.topicContext.maxTopicIndex = 0; } primaryTopicReferenceIsAllowedInCurrentTopicContext() { return this.state.topicContext.maxNumOfResolvableTopics >= 1; } topicReferenceWasUsedInCurrentTopicContext() { return this.state.topicContext.maxTopicIndex != null && this.state.topicContext.maxTopicIndex >= 0; } parseFSharpPipelineBody(prec) { const startPos = this.state.start; const startLoc = this.state.startLoc; this.state.potentialArrowAt = this.state.start; const oldInFSharpPipelineDirectBody = this.state.inFSharpPipelineDirectBody; this.state.inFSharpPipelineDirectBody = true; const ret = this.parseExprOp(this.parseMaybeUnary(), startPos, startLoc, prec); this.state.inFSharpPipelineDirectBody = oldInFSharpPipelineDirectBody; return ret; } parseModuleExpression() { this.expectPlugin("moduleBlocks"); const node = this.startNode(); this.next(); this.eat(types.braceL); const revertScopes = this.initializeScopes(true); this.enterInitialScopes(); const program = this.startNode(); try { node.body = this.parseProgram(program, types.braceR, "module"); } finally { revertScopes(); } this.eat(types.braceR); return this.finishNode(node, "ModuleExpression"); } } const loopLabel = { kind: "loop" }, switchLabel = { kind: "switch" }; const FUNC_NO_FLAGS = 0b000, FUNC_STATEMENT = 0b001, FUNC_HANGING_STATEMENT = 0b010, FUNC_NULLABLE_ID = 0b100; const loneSurrogate = /[\uD800-\uDFFF]/u; class StatementParser extends ExpressionParser { parseTopLevel(file, program) { file.program = this.parseProgram(program); file.comments = this.state.comments; if (this.options.tokens) file.tokens = this.tokens; return this.finishNode(file, "File"); } parseProgram(program, end = types.eof, sourceType = this.options.sourceType) { program.sourceType = sourceType; program.interpreter = this.parseInterpreterDirective(); this.parseBlockBody(program, true, true, end); if (this.inModule && !this.options.allowUndeclaredExports && this.scope.undefinedExports.size > 0) { for (const [name] of Array.from(this.scope.undefinedExports)) { const pos = this.scope.undefinedExports.get(name); this.raise(pos, ErrorMessages.ModuleExportUndefined, name); } } return this.finishNode(program, "Program"); } stmtToDirective(stmt) { const expr = stmt.expression; const directiveLiteral = this.startNodeAt(expr.start, expr.loc.start); const directive = this.startNodeAt(stmt.start, stmt.loc.start); const raw = this.input.slice(expr.start, expr.end); const val = directiveLiteral.value = raw.slice(1, -1); this.addExtra(directiveLiteral, "raw", raw); this.addExtra(directiveLiteral, "rawValue", val); directive.value = this.finishNodeAt(directiveLiteral, "DirectiveLiteral", expr.end, expr.loc.end); return this.finishNodeAt(directive, "Directive", stmt.end, stmt.loc.end); } parseInterpreterDirective() { if (!this.match(types.interpreterDirective)) { return null; } const node = this.startNode(); node.value = this.state.value; this.next(); return this.finishNode(node, "InterpreterDirective"); } isLet(context) { if (!this.isContextual("let")) { return false; } const next = this.nextTokenStart(); const nextCh = this.input.charCodeAt(next); if (nextCh === 91) return true; if (context) return false; if (nextCh === 123) return true; if (isIdentifierStart(nextCh)) { let pos = next + 1; while (isIdentifierChar(this.input.charCodeAt(pos))) { ++pos; } const ident = this.input.slice(next, pos); if (!keywordRelationalOperator.test(ident)) return true; } return false; } parseStatement(context, topLevel) { if (this.match(types.at)) { this.parseDecorators(true); } return this.parseStatementContent(context, topLevel); } parseStatementContent(context, topLevel) { let starttype = this.state.type; const node = this.startNode(); let kind; if (this.isLet(context)) { starttype = types._var; kind = "let"; } switch (starttype) { case types._break: case types._continue: return this.parseBreakContinueStatement(node, starttype.keyword); case types._debugger: return this.parseDebuggerStatement(node); case types._do: return this.parseDoStatement(node); case types._for: return this.parseForStatement(node); case types._function: if (this.lookaheadCharCode() === 46) break; if (context) { if (this.state.strict) { this.raise(this.state.start, ErrorMessages.StrictFunction); } else if (context !== "if" && context !== "label") { this.raise(this.state.start, ErrorMessages.SloppyFunction); } } return this.parseFunctionStatement(node, false, !context); case types._class: if (context) this.unexpected(); return this.parseClass(node, true); case types._if: return this.parseIfStatement(node); case types._return: return this.parseReturnStatement(node); case types._switch: return this.parseSwitchStatement(node); case types._throw: return this.parseThrowStatement(node); case types._try: return this.parseTryStatement(node); case types._const: case types._var: kind = kind || this.state.value; if (context && kind !== "var") { this.raise(this.state.start, ErrorMessages.UnexpectedLexicalDeclaration); } return this.parseVarStatement(node, kind); case types._while: return this.parseWhileStatement(node); case types._with: return this.parseWithStatement(node); case types.braceL: return this.parseBlock(); case types.semi: return this.parseEmptyStatement(node); case types._import: { const nextTokenCharCode = this.lookaheadCharCode(); if (nextTokenCharCode === 40 || nextTokenCharCode === 46) { break; } } case types._export: { if (!this.options.allowImportExportEverywhere && !topLevel) { this.raise(this.state.start, ErrorMessages.UnexpectedImportExport); } this.next(); let result; if (starttype === types._import) { result = this.parseImport(node); if (result.type === "ImportDeclaration" && (!result.importKind || result.importKind === "value")) { this.sawUnambiguousESM = true; } } else { result = this.parseExport(node); if (result.type === "ExportNamedDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportAllDeclaration" && (!result.exportKind || result.exportKind === "value") || result.type === "ExportDefaultDeclaration") { this.sawUnambiguousESM = true; } } this.assertModuleNodeAllowed(node); return result; } default: { if (this.isAsyncFunction()) { if (context) { this.raise(this.state.start, ErrorMessages.AsyncFunctionInSingleStatementContext); } this.next(); return this.parseFunctionStatement(node, true, !context); } } } const maybeName = this.state.value; const expr = this.parseExpression(); if (starttype === types.name && expr.type === "Identifier" && this.eat(types.colon)) { return this.parseLabeledStatement(node, maybeName, expr, context); } else { return this.parseExpressionStatement(node, expr); } } assertModuleNodeAllowed(node) { if (!this.options.allowImportExportEverywhere && !this.inModule) { this.raiseWithData(node.start, { code: "BABEL_PARSER_SOURCETYPE_MODULE_REQUIRED" }, ErrorMessages.ImportOutsideModule); } } takeDecorators(node) { const decorators = this.state.decoratorStack[this.state.decoratorStack.length - 1]; if (decorators.length) { node.decorators = decorators; this.resetStartLocationFromNode(node, decorators[0]); this.state.decoratorStack[this.state.decoratorStack.length - 1] = []; } } canHaveLeadingDecorator() { return this.match(types._class); } parseDecorators(allowExport) { const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1]; while (this.match(types.at)) { const decorator = this.parseDecorator(); currentContextDecorators.push(decorator); } if (this.match(types._export)) { if (!allowExport) { this.unexpected(); } if (this.hasPlugin("decorators") && !this.getPluginOption("decorators", "decoratorsBeforeExport")) { this.raise(this.state.start, ErrorMessages.DecoratorExportClass); } } else if (!this.canHaveLeadingDecorator()) { throw this.raise(this.state.start, ErrorMessages.UnexpectedLeadingDecorator); } } parseDecorator() { this.expectOnePlugin(["decorators-legacy", "decorators"]); const node = this.startNode(); this.next(); if (this.hasPlugin("decorators")) { this.state.decoratorStack.push([]); const startPos = this.state.start; const startLoc = this.state.startLoc; let expr; if (this.eat(types.parenL)) { expr = this.parseExpression(); this.expect(types.parenR); } else { expr = this.parseIdentifier(false); while (this.eat(types.dot)) { const node = this.startNodeAt(startPos, startLoc); node.object = expr; node.property = this.parseIdentifier(true); node.computed = false; expr = this.finishNode(node, "MemberExpression"); } } node.expression = this.parseMaybeDecoratorArguments(expr); this.state.decoratorStack.pop(); } else { node.expression = this.parseExprSubscripts(); } return this.finishNode(node, "Decorator"); } parseMaybeDecoratorArguments(expr) { if (this.eat(types.parenL)) { const node = this.startNodeAtNode(expr); node.callee = expr; node.arguments = this.parseCallExpressionArguments(types.parenR, false); this.toReferencedList(node.arguments); return this.finishNode(node, "CallExpression"); } return expr; } parseBreakContinueStatement(node, keyword) { const isBreak = keyword === "break"; this.next(); if (this.isLineTerminator()) { node.label = null; } else { node.label = this.parseIdentifier(); this.semicolon(); } this.verifyBreakContinue(node, keyword); return this.finishNode(node, isBreak ? "BreakStatement" : "ContinueStatement"); } verifyBreakContinue(node, keyword) { const isBreak = keyword === "break"; let i; for (i = 0; i < this.state.labels.length; ++i) { const lab = this.state.labels[i]; if (node.label == null || lab.name === node.label.name) { if (lab.kind != null && (isBreak || lab.kind === "loop")) break; if (node.label && isBreak) break; } } if (i === this.state.labels.length) { this.raise(node.start, ErrorMessages.IllegalBreakContinue, keyword); } } parseDebuggerStatement(node) { this.next(); this.semicolon(); return this.finishNode(node, "DebuggerStatement"); } parseHeaderExpression() { this.expect(types.parenL); const val = this.parseExpression(); this.expect(types.parenR); return val; } parseDoStatement(node) { this.next(); this.state.labels.push(loopLabel); node.body = this.withTopicForbiddingContext(() => this.parseStatement("do")); this.state.labels.pop(); this.expect(types._while); node.test = this.parseHeaderExpression(); this.eat(types.semi); return this.finishNode(node, "DoWhileStatement"); } parseForStatement(node) { this.next(); this.state.labels.push(loopLabel); let awaitAt = -1; if (this.isAwaitAllowed() && this.eatContextual("await")) { awaitAt = this.state.lastTokStart; } this.scope.enter(SCOPE_OTHER); this.expect(types.parenL); if (this.match(types.semi)) { if (awaitAt > -1) { this.unexpected(awaitAt); } return this.parseFor(node, null); } const isLet = this.isLet(); if (this.match(types._var) || this.match(types._const) || isLet) { const init = this.startNode(); const kind = isLet ? "let" : this.state.value; this.next(); this.parseVar(init, true, kind); this.finishNode(init, "VariableDeclaration"); if ((this.match(types._in) || this.isContextual("of")) && init.declarations.length === 1) { return this.parseForIn(node, init, awaitAt); } if (awaitAt > -1) { this.unexpected(awaitAt); } return this.parseFor(node, init); } const refExpressionErrors = new ExpressionErrors(); const init = this.parseExpression(true, refExpressionErrors); if (this.match(types._in) || this.isContextual("of")) { this.toAssignable(init, true); const description = this.isContextual("of") ? "for-of statement" : "for-in statement"; this.checkLVal(init, description); return this.parseForIn(node, init, awaitAt); } else { this.checkExpressionErrors(refExpressionErrors, true); } if (awaitAt > -1) { this.unexpected(awaitAt); } return this.parseFor(node, init); } parseFunctionStatement(node, isAsync, declarationPosition) { this.next(); return this.parseFunction(node, FUNC_STATEMENT | (declarationPosition ? 0 : FUNC_HANGING_STATEMENT), isAsync); } parseIfStatement(node) { this.next(); node.test = this.parseHeaderExpression(); node.consequent = this.parseStatement("if"); node.alternate = this.eat(types._else) ? this.parseStatement("if") : null; return this.finishNode(node, "IfStatement"); } parseReturnStatement(node) { if (!this.prodParam.hasReturn && !this.options.allowReturnOutsideFunction) { this.raise(this.state.start, ErrorMessages.IllegalReturn); } this.next(); if (this.isLineTerminator()) { node.argument = null; } else { node.argument = this.parseExpression(); this.semicolon(); } return this.finishNode(node, "ReturnStatement"); } parseSwitchStatement(node) { this.next(); node.discriminant = this.parseHeaderExpression(); const cases = node.cases = []; this.expect(types.braceL); this.state.labels.push(switchLabel); this.scope.enter(SCOPE_OTHER); let cur; for (let sawDefault; !this.match(types.braceR);) { if (this.match(types._case) || this.match(types._default)) { const isCase = this.match(types._case); if (cur) this.finishNode(cur, "SwitchCase"); cases.push(cur = this.startNode()); cur.consequent = []; this.next(); if (isCase) { cur.test = this.parseExpression(); } else { if (sawDefault) { this.raise(this.state.lastTokStart, ErrorMessages.MultipleDefaultsInSwitch); } sawDefault = true; cur.test = null; } this.expect(types.colon); } else { if (cur) { cur.consequent.push(this.parseStatement(null)); } else { this.unexpected(); } } } this.scope.exit(); if (cur) this.finishNode(cur, "SwitchCase"); this.next(); this.state.labels.pop(); return this.finishNode(node, "SwitchStatement"); } parseThrowStatement(node) { this.next(); if (this.hasPrecedingLineBreak()) { this.raise(this.state.lastTokEnd, ErrorMessages.NewlineAfterThrow); } node.argument = this.parseExpression(); this.semicolon(); return this.finishNode(node, "ThrowStatement"); } parseCatchClauseParam() { const param = this.parseBindingAtom(); const simple = param.type === "Identifier"; this.scope.enter(simple ? SCOPE_SIMPLE_CATCH : 0); this.checkLVal(param, "catch clause", BIND_LEXICAL); return param; } parseTryStatement(node) { this.next(); node.block = this.parseBlock(); node.handler = null; if (this.match(types._catch)) { const clause = this.startNode(); this.next(); if (this.match(types.parenL)) { this.expect(types.parenL); clause.param = this.parseCatchClauseParam(); this.expect(types.parenR); } else { clause.param = null; this.scope.enter(SCOPE_OTHER); } clause.body = this.withTopicForbiddingContext(() => this.parseBlock(false, false)); this.scope.exit(); node.handler = this.finishNode(clause, "CatchClause"); } node.finalizer = this.eat(types._finally) ? this.parseBlock() : null; if (!node.handler && !node.finalizer) { this.raise(node.start, ErrorMessages.NoCatchOrFinally); } return this.finishNode(node, "TryStatement"); } parseVarStatement(node, kind) { this.next(); this.parseVar(node, false, kind); this.semicolon(); return this.finishNode(node, "VariableDeclaration"); } parseWhileStatement(node) { this.next(); node.test = this.parseHeaderExpression(); this.state.labels.push(loopLabel); node.body = this.withTopicForbiddingContext(() => this.parseStatement("while")); this.state.labels.pop(); return this.finishNode(node, "WhileStatement"); } parseWithStatement(node) { if (this.state.strict) { this.raise(this.state.start, ErrorMessages.StrictWith); } this.next(); node.object = this.parseHeaderExpression(); node.body = this.withTopicForbiddingContext(() => this.parseStatement("with")); return this.finishNode(node, "WithStatement"); } parseEmptyStatement(node) { this.next(); return this.finishNode(node, "EmptyStatement"); } parseLabeledStatement(node, maybeName, expr, context) { for (const label of this.state.labels) { if (label.name === maybeName) { this.raise(expr.start, ErrorMessages.LabelRedeclaration, maybeName); } } const kind = this.state.type.isLoop ? "loop" : this.match(types._switch) ? "switch" : null; for (let i = this.state.labels.length - 1; i >= 0; i--) { const label = this.state.labels[i]; if (label.statementStart === node.start) { label.statementStart = this.state.start; label.kind = kind; } else { break; } } this.state.labels.push({ name: maybeName, kind: kind, statementStart: this.state.start }); node.body = this.parseStatement(context ? context.indexOf("label") === -1 ? context + "label" : context : "label"); this.state.labels.pop(); node.label = expr; return this.finishNode(node, "LabeledStatement"); } parseExpressionStatement(node, expr) { node.expression = expr; this.semicolon(); return this.finishNode(node, "ExpressionStatement"); } parseBlock(allowDirectives = false, createNewLexicalScope = true, afterBlockParse) { const node = this.startNode(); if (allowDirectives) { this.state.strictErrors.clear(); } this.expect(types.braceL); if (createNewLexicalScope) { this.scope.enter(SCOPE_OTHER); } this.parseBlockBody(node, allowDirectives, false, types.braceR, afterBlockParse); if (createNewLexicalScope) { this.scope.exit(); } return this.finishNode(node, "BlockStatement"); } isValidDirective(stmt) { return stmt.type === "ExpressionStatement" && stmt.expression.type === "StringLiteral" && !stmt.expression.extra.parenthesized; } parseBlockBody(node, allowDirectives, topLevel, end, afterBlockParse) { const body = node.body = []; const directives = node.directives = []; this.parseBlockOrModuleBlockBody(body, allowDirectives ? directives : undefined, topLevel, end, afterBlockParse); } parseBlockOrModuleBlockBody(body, directives, topLevel, end, afterBlockParse) { const oldStrict = this.state.strict; let hasStrictModeDirective = false; let parsedNonDirective = false; while (!this.match(end)) { const stmt = this.parseStatement(null, topLevel); if (directives && !parsedNonDirective) { if (this.isValidDirective(stmt)) { const directive = this.stmtToDirective(stmt); directives.push(directive); if (!hasStrictModeDirective && directive.value.value === "use strict") { hasStrictModeDirective = true; this.setStrict(true); } continue; } parsedNonDirective = true; this.state.strictErrors.clear(); } body.push(stmt); } if (afterBlockParse) { afterBlockParse.call(this, hasStrictModeDirective); } if (!oldStrict) { this.setStrict(false); } this.next(); } parseFor(node, init) { node.init = init; this.semicolon(false); node.test = this.match(types.semi) ? null : this.parseExpression(); this.semicolon(false); node.update = this.match(types.parenR) ? null : this.parseExpression(); this.expect(types.parenR); node.body = this.withTopicForbiddingContext(() => this.parseStatement("for")); this.scope.exit(); this.state.labels.pop(); return this.finishNode(node, "ForStatement"); } parseForIn(node, init, awaitAt) { const isForIn = this.match(types._in); this.next(); if (isForIn) { if (awaitAt > -1) this.unexpected(awaitAt); } else { node.await = awaitAt > -1; } if (init.type === "VariableDeclaration" && init.declarations[0].init != null && (!isForIn || this.state.strict || init.kind !== "var" || init.declarations[0].id.type !== "Identifier")) { this.raise(init.start, ErrorMessages.ForInOfLoopInitializer, isForIn ? "for-in" : "for-of"); } else if (init.type === "AssignmentPattern") { this.raise(init.start, ErrorMessages.InvalidLhs, "for-loop"); } node.left = init; node.right = isForIn ? this.parseExpression() : this.parseMaybeAssignAllowIn(); this.expect(types.parenR); node.body = this.withTopicForbiddingContext(() => this.parseStatement("for")); this.scope.exit(); this.state.labels.pop(); return this.finishNode(node, isForIn ? "ForInStatement" : "ForOfStatement"); } parseVar(node, isFor, kind) { const declarations = node.declarations = []; const isTypescript = this.hasPlugin("typescript"); node.kind = kind; for (;;) { const decl = this.startNode(); this.parseVarId(decl, kind); if (this.eat(types.eq)) { decl.init = isFor ? this.parseMaybeAssignDisallowIn() : this.parseMaybeAssignAllowIn(); } else { if (kind === "const" && !(this.match(types._in) || this.isContextual("of"))) { if (!isTypescript) { this.raise(this.state.lastTokEnd, ErrorMessages.DeclarationMissingInitializer, "Const declarations"); } } else if (decl.id.type !== "Identifier" && !(isFor && (this.match(types._in) || this.isContextual("of")))) { this.raise(this.state.lastTokEnd, ErrorMessages.DeclarationMissingInitializer, "Complex binding patterns"); } decl.init = null; } declarations.push(this.finishNode(decl, "VariableDeclarator")); if (!this.eat(types.comma)) break; } return node; } parseVarId(decl, kind) { decl.id = this.parseBindingAtom(); this.checkLVal(decl.id, "variable declaration", kind === "var" ? BIND_VAR : BIND_LEXICAL, undefined, kind !== "var"); } parseFunction(node, statement = FUNC_NO_FLAGS, isAsync = false) { const isStatement = statement & FUNC_STATEMENT; const isHangingStatement = statement & FUNC_HANGING_STATEMENT; const requireId = !!isStatement && !(statement & FUNC_NULLABLE_ID); this.initFunction(node, isAsync); if (this.match(types.star) && isHangingStatement) { this.raise(this.state.start, ErrorMessages.GeneratorInSingleStatementContext); } node.generator = this.eat(types.star); if (isStatement) { node.id = this.parseFunctionId(requireId); } const oldMaybeInArrowParameters = this.state.maybeInArrowParameters; this.state.maybeInArrowParameters = false; this.scope.enter(SCOPE_FUNCTION); this.prodParam.enter(functionFlags(isAsync, node.generator)); if (!isStatement) { node.id = this.parseFunctionId(); } this.parseFunctionParams(node, false); this.withTopicForbiddingContext(() => { this.parseFunctionBodyAndFinish(node, isStatement ? "FunctionDeclaration" : "FunctionExpression"); }); this.prodParam.exit(); this.scope.exit(); if (isStatement && !isHangingStatement) { this.registerFunctionStatementId(node); } this.state.maybeInArrowParameters = oldMaybeInArrowParameters; return node; } parseFunctionId(requireId) { return requireId || this.match(types.name) ? this.parseIdentifier() : null; } parseFunctionParams(node, allowModifiers) { this.expect(types.parenL); this.expressionScope.enter(newParameterDeclarationScope()); node.params = this.parseBindingList(types.parenR, 41, false, allowModifiers); this.expressionScope.exit(); } registerFunctionStatementId(node) { if (!node.id) return; this.scope.declareName(node.id.name, this.state.strict || node.generator || node.async ? this.scope.treatFunctionsAsVar ? BIND_VAR : BIND_LEXICAL : BIND_FUNCTION, node.id.start); } parseClass(node, isStatement, optionalId) { this.next(); this.takeDecorators(node); const oldStrict = this.state.strict; this.state.strict = true; this.parseClassId(node, isStatement, optionalId); this.parseClassSuper(node); node.body = this.parseClassBody(!!node.superClass, oldStrict); return this.finishNode(node, isStatement ? "ClassDeclaration" : "ClassExpression"); } isClassProperty() { return this.match(types.eq) || this.match(types.semi) || this.match(types.braceR); } isClassMethod() { return this.match(types.parenL); } isNonstaticConstructor(method) { return !method.computed && !method.static && (method.key.name === "constructor" || method.key.value === "constructor"); } parseClassBody(constructorAllowsSuper, oldStrict) { this.classScope.enter(); const state = { constructorAllowsSuper, hadConstructor: false, hadStaticBlock: false }; let decorators = []; const classBody = this.startNode(); classBody.body = []; this.expect(types.braceL); this.withTopicForbiddingContext(() => { while (!this.match(types.braceR)) { if (this.eat(types.semi)) { if (decorators.length > 0) { throw this.raise(this.state.lastTokEnd, ErrorMessages.DecoratorSemicolon); } continue; } if (this.match(types.at)) { decorators.push(this.parseDecorator()); continue; } const member = this.startNode(); if (decorators.length) { member.decorators = decorators; this.resetStartLocationFromNode(member, decorators[0]); decorators = []; } this.parseClassMember(classBody, member, state); if (member.kind === "constructor" && member.decorators && member.decorators.length > 0) { this.raise(member.start, ErrorMessages.DecoratorConstructor); } } }); this.state.strict = oldStrict; this.next(); if (decorators.length) { throw this.raise(this.state.start, ErrorMessages.TrailingDecorator); } this.classScope.exit(); return this.finishNode(classBody, "ClassBody"); } parseClassMemberFromModifier(classBody, member) { const key = this.parseIdentifier(true); if (this.isClassMethod()) { const method = member; method.kind = "method"; method.computed = false; method.key = key; method.static = false; this.pushClassMethod(classBody, method, false, false, false, false); return true; } else if (this.isClassProperty()) { const prop = member; prop.computed = false; prop.key = key; prop.static = false; classBody.body.push(this.parseClassProperty(prop)); return true; } return false; } parseClassMember(classBody, member, state) { const isStatic = this.isContextual("static"); if (isStatic) { if (this.parseClassMemberFromModifier(classBody, member)) { return; } if (this.eat(types.braceL)) { this.parseClassStaticBlock(classBody, member, state); return; } } this.parseClassMemberWithIsStatic(classBody, member, state, isStatic); } parseClassMemberWithIsStatic(classBody, member, state, isStatic) { const publicMethod = member; const privateMethod = member; const publicProp = member; const privateProp = member; const method = publicMethod; const publicMember = publicMethod; member.static = isStatic; if (this.eat(types.star)) { method.kind = "method"; this.parseClassElementName(method); if (this.isPrivateName(method.key)) { this.pushClassPrivateMethod(classBody, privateMethod, true, false); return; } if (this.isNonstaticConstructor(publicMethod)) { this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsGenerator); } this.pushClassMethod(classBody, publicMethod, true, false, false, false); return; } const containsEsc = this.state.containsEsc; const key = this.parseClassElementName(member); const isPrivate = this.isPrivateName(key); const isSimple = key.type === "Identifier"; const maybeQuestionTokenStart = this.state.start; this.parsePostMemberNameModifiers(publicMember); if (this.isClassMethod()) { method.kind = "method"; if (isPrivate) { this.pushClassPrivateMethod(classBody, privateMethod, false, false); return; } const isConstructor = this.isNonstaticConstructor(publicMethod); let allowsDirectSuper = false; if (isConstructor) { publicMethod.kind = "constructor"; if (state.hadConstructor && !this.hasPlugin("typescript")) { this.raise(key.start, ErrorMessages.DuplicateConstructor); } state.hadConstructor = true; allowsDirectSuper = state.constructorAllowsSuper; } this.pushClassMethod(classBody, publicMethod, false, false, isConstructor, allowsDirectSuper); } else if (this.isClassProperty()) { if (isPrivate) { this.pushClassPrivateProperty(classBody, privateProp); } else { this.pushClassProperty(classBody, publicProp); } } else if (isSimple && key.name === "async" && !containsEsc && !this.isLineTerminator()) { const isGenerator = this.eat(types.star); if (publicMember.optional) { this.unexpected(maybeQuestionTokenStart); } method.kind = "method"; this.parseClassElementName(method); this.parsePostMemberNameModifiers(publicMember); if (this.isPrivateName(method.key)) { this.pushClassPrivateMethod(classBody, privateMethod, isGenerator, true); } else { if (this.isNonstaticConstructor(publicMethod)) { this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsAsync); } this.pushClassMethod(classBody, publicMethod, isGenerator, true, false, false); } } else if (isSimple && (key.name === "get" || key.name === "set") && !containsEsc && !(this.match(types.star) && this.isLineTerminator())) { method.kind = key.name; this.parseClassElementName(publicMethod); if (this.isPrivateName(method.key)) { this.pushClassPrivateMethod(classBody, privateMethod, false, false); } else { if (this.isNonstaticConstructor(publicMethod)) { this.raise(publicMethod.key.start, ErrorMessages.ConstructorIsAccessor); } this.pushClassMethod(classBody, publicMethod, false, false, false, false); } this.checkGetterSetterParams(publicMethod); } else if (this.isLineTerminator()) { if (isPrivate) { this.pushClassPrivateProperty(classBody, privateProp); } else { this.pushClassProperty(classBody, publicProp); } } else { this.unexpected(); } } parseClassElementName(member) { const key = this.parsePropertyName(member, true); if (!member.computed && member.static && (key.name === "prototype" || key.value === "prototype")) { this.raise(key.start, ErrorMessages.StaticPrototype); } if (this.isPrivateName(key) && this.getPrivateNameSV(key) === "constructor") { this.raise(key.start, ErrorMessages.ConstructorClassPrivateField); } return key; } parseClassStaticBlock(classBody, member, state) { var _member$decorators; this.expectPlugin("classStaticBlock", member.start); this.scope.enter(SCOPE_CLASS | SCOPE_STATIC_BLOCK | SCOPE_SUPER); const oldLabels = this.state.labels; this.state.labels = []; this.prodParam.enter(PARAM); const body = member.body = []; this.parseBlockOrModuleBlockBody(body, undefined, false, types.braceR); this.prodParam.exit(); this.scope.exit(); this.state.labels = oldLabels; classBody.body.push(this.finishNode(member, "StaticBlock")); if (state.hadStaticBlock) { this.raise(member.start, ErrorMessages.DuplicateStaticBlock); } if ((_member$decorators = member.decorators) != null && _member$decorators.length) { this.raise(member.start, ErrorMessages.DecoratorStaticBlock); } state.hadStaticBlock = true; } pushClassProperty(classBody, prop) { if (!prop.computed && (prop.key.name === "constructor" || prop.key.value === "constructor")) { this.raise(prop.key.start, ErrorMessages.ConstructorClassField); } classBody.body.push(this.parseClassProperty(prop)); } pushClassPrivateProperty(classBody, prop) { this.expectPlugin("classPrivateProperties", prop.key.start); const node = this.parseClassPrivateProperty(prop); classBody.body.push(node); this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), CLASS_ELEMENT_OTHER, node.key.start); } pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) { classBody.body.push(this.parseMethod(method, isGenerator, isAsync, isConstructor, allowsDirectSuper, "ClassMethod", true)); } pushClassPrivateMethod(classBody, method, isGenerator, isAsync) { this.expectPlugin("classPrivateMethods", method.key.start); const node = this.parseMethod(method, isGenerator, isAsync, false, false, "ClassPrivateMethod", true); classBody.body.push(node); const kind = node.kind === "get" ? node.static ? CLASS_ELEMENT_STATIC_GETTER : CLASS_ELEMENT_INSTANCE_GETTER : node.kind === "set" ? node.static ? CLASS_ELEMENT_STATIC_SETTER : CLASS_ELEMENT_INSTANCE_SETTER : CLASS_ELEMENT_OTHER; this.classScope.declarePrivateName(this.getPrivateNameSV(node.key), kind, node.key.start); } parsePostMemberNameModifiers(methodOrProp) {} parseClassPrivateProperty(node) { this.parseInitializer(node); this.semicolon(); return this.finishNode(node, "ClassPrivateProperty"); } parseClassProperty(node) { if (!node.typeAnnotation || this.match(types.eq)) { this.expectPlugin("classProperties"); } this.parseInitializer(node); this.semicolon(); return this.finishNode(node, "ClassProperty"); } parseInitializer(node) { this.scope.enter(SCOPE_CLASS | SCOPE_SUPER); this.expressionScope.enter(newExpressionScope()); this.prodParam.enter(PARAM); node.value = this.eat(types.eq) ? this.parseMaybeAssignAllowIn() : null; this.expressionScope.exit(); this.prodParam.exit(); this.scope.exit(); } parseClassId(node, isStatement, optionalId, bindingType = BIND_CLASS) { if (this.match(types.name)) { node.id = this.parseIdentifier(); if (isStatement) { this.checkLVal(node.id, "class name", bindingType); } } else { if (optionalId || !isStatement) { node.id = null; } else { this.unexpected(null, ErrorMessages.MissingClassName); } } } parseClassSuper(node) { node.superClass = this.eat(types._extends) ? this.parseExprSubscripts() : null; } parseExport(node) { const hasDefault = this.maybeParseExportDefaultSpecifier(node); const parseAfterDefault = !hasDefault || this.eat(types.comma); const hasStar = parseAfterDefault && this.eatExportStar(node); const hasNamespace = hasStar && this.maybeParseExportNamespaceSpecifier(node); const parseAfterNamespace = parseAfterDefault && (!hasNamespace || this.eat(types.comma)); const isFromRequired = hasDefault || hasStar; if (hasStar && !hasNamespace) { if (hasDefault) this.unexpected(); this.parseExportFrom(node, true); return this.finishNode(node, "ExportAllDeclaration"); } const hasSpecifiers = this.maybeParseExportNamedSpecifiers(node); if (hasDefault && parseAfterDefault && !hasStar && !hasSpecifiers || hasNamespace && parseAfterNamespace && !hasSpecifiers) { throw this.unexpected(null, types.braceL); } let hasDeclaration; if (isFromRequired || hasSpecifiers) { hasDeclaration = false; this.parseExportFrom(node, isFromRequired); } else { hasDeclaration = this.maybeParseExportDeclaration(node); } if (isFromRequired || hasSpecifiers || hasDeclaration) { this.checkExport(node, true, false, !!node.source); return this.finishNode(node, "ExportNamedDeclaration"); } if (this.eat(types._default)) { node.declaration = this.parseExportDefaultExpression(); this.checkExport(node, true, true); return this.finishNode(node, "ExportDefaultDeclaration"); } throw this.unexpected(null, types.braceL); } eatExportStar(node) { return this.eat(types.star); } maybeParseExportDefaultSpecifier(node) { if (this.isExportDefaultSpecifier()) { this.expectPlugin("exportDefaultFrom"); const specifier = this.startNode(); specifier.exported = this.parseIdentifier(true); node.specifiers = [this.finishNode(specifier, "ExportDefaultSpecifier")]; return true; } return false; } maybeParseExportNamespaceSpecifier(node) { if (this.isContextual("as")) { if (!node.specifiers) node.specifiers = []; const specifier = this.startNodeAt(this.state.lastTokStart, this.state.lastTokStartLoc); this.next(); specifier.exported = this.parseModuleExportName(); node.specifiers.push(this.finishNode(specifier, "ExportNamespaceSpecifier")); return true; } return false; } maybeParseExportNamedSpecifiers(node) { if (this.match(types.braceL)) { if (!node.specifiers) node.specifiers = []; node.specifiers.push(...this.parseExportSpecifiers()); node.source = null; node.declaration = null; return true; } return false; } maybeParseExportDeclaration(node) { if (this.shouldParseExportDeclaration()) { node.specifiers = []; node.source = null; node.declaration = this.parseExportDeclaration(node); return true; } return false; } isAsyncFunction() { if (!this.isContextual("async")) return false; const next = this.nextTokenStart(); return !lineBreak.test(this.input.slice(this.state.pos, next)) && this.isUnparsedContextual(next, "function"); } parseExportDefaultExpression() { const expr = this.startNode(); const isAsync = this.isAsyncFunction(); if (this.match(types._function) || isAsync) { this.next(); if (isAsync) { this.next(); } return this.parseFunction(expr, FUNC_STATEMENT | FUNC_NULLABLE_ID, isAsync); } else if (this.match(types._class)) { return this.parseClass(expr, true, true); } else if (this.match(types.at)) { if (this.hasPlugin("decorators") && this.getPluginOption("decorators", "decoratorsBeforeExport")) { this.raise(this.state.start, ErrorMessages.DecoratorBeforeExport); } this.parseDecorators(false); return this.parseClass(expr, true, true); } else if (this.match(types._const) || this.match(types._var) || this.isLet()) { throw this.raise(this.state.start, ErrorMessages.UnsupportedDefaultExport); } else { const res = this.parseMaybeAssignAllowIn(); this.semicolon(); return res; } } parseExportDeclaration(node) { return this.parseStatement(null); } isExportDefaultSpecifier() { if (this.match(types.name)) { const value = this.state.value; if (value === "async" && !this.state.containsEsc || value === "let") { return false; } if ((value === "type" || value === "interface") && !this.state.containsEsc) { const l = this.lookahead(); if (l.type === types.name && l.value !== "from" || l.type === types.braceL) { this.expectOnePlugin(["flow", "typescript"]); return false; } } } else if (!this.match(types._default)) { return false; } const next = this.nextTokenStart(); const hasFrom = this.isUnparsedContextual(next, "from"); if (this.input.charCodeAt(next) === 44 || this.match(types.name) && hasFrom) { return true; } if (this.match(types._default) && hasFrom) { const nextAfterFrom = this.input.charCodeAt(this.nextTokenStartSince(next + 4)); return nextAfterFrom === 34 || nextAfterFrom === 39; } return false; } parseExportFrom(node, expect) { if (this.eatContextual("from")) { node.source = this.parseImportSource(); this.checkExport(node); const assertions = this.maybeParseImportAssertions(); if (assertions) { node.assertions = assertions; } } else { if (expect) { this.unexpected(); } else { node.source = null; } } this.semicolon(); } shouldParseExportDeclaration() { if (this.match(types.at)) { this.expectOnePlugin(["decorators", "decorators-legacy"]); if (this.hasPlugin("decorators")) { if (this.getPluginOption("decorators", "decoratorsBeforeExport")) { this.unexpected(this.state.start, ErrorMessages.DecoratorBeforeExport); } else { return true; } } } return this.state.type.keyword === "var" || this.state.type.keyword === "const" || this.state.type.keyword === "function" || this.state.type.keyword === "class" || this.isLet() || this.isAsyncFunction(); } checkExport(node, checkNames, isDefault, isFrom) { if (checkNames) { if (isDefault) { this.checkDuplicateExports(node, "default"); if (this.hasPlugin("exportDefaultFrom")) { var _declaration$extra; const declaration = node.declaration; if (declaration.type === "Identifier" && declaration.name === "from" && declaration.end - declaration.start === 4 && !((_declaration$extra = declaration.extra) != null && _declaration$extra.parenthesized)) { this.raise(declaration.start, ErrorMessages.ExportDefaultFromAsIdentifier); } } } else if (node.specifiers && node.specifiers.length) { for (const specifier of node.specifiers) { const { exported } = specifier; const exportedName = exported.type === "Identifier" ? exported.name : exported.value; this.checkDuplicateExports(specifier, exportedName); if (!isFrom && specifier.local) { const { local } = specifier; if (local.type === "StringLiteral") { this.raise(specifier.start, ErrorMessages.ExportBindingIsString, local.value, exportedName); } else { this.checkReservedWord(local.name, local.start, true, false); this.scope.checkLocalExport(local); } } } } else if (node.declaration) { if (node.declaration.type === "FunctionDeclaration" || node.declaration.type === "ClassDeclaration") { const id = node.declaration.id; if (!id) throw new Error("Assertion failure"); this.checkDuplicateExports(node, id.name); } else if (node.declaration.type === "VariableDeclaration") { for (const declaration of node.declaration.declarations) { this.checkDeclaration(declaration.id); } } } } const currentContextDecorators = this.state.decoratorStack[this.state.decoratorStack.length - 1]; if (currentContextDecorators.length) { throw this.raise(node.start, ErrorMessages.UnsupportedDecoratorExport); } } checkDeclaration(node) { if (node.type === "Identifier") { this.checkDuplicateExports(node, node.name); } else if (node.type === "ObjectPattern") { for (const prop of node.properties) { this.checkDeclaration(prop); } } else if (node.type === "ArrayPattern") { for (const elem of node.elements) { if (elem) { this.checkDeclaration(elem); } } } else if (node.type === "ObjectProperty") { this.checkDeclaration(node.value); } else if (node.type === "RestElement") { this.checkDeclaration(node.argument); } else if (node.type === "AssignmentPattern") { this.checkDeclaration(node.left); } } checkDuplicateExports(node, name) { if (this.state.exportedIdentifiers.indexOf(name) > -1) { this.raise(node.start, name === "default" ? ErrorMessages.DuplicateDefaultExport : ErrorMessages.DuplicateExport, name); } this.state.exportedIdentifiers.push(name); } parseExportSpecifiers() { const nodes = []; let first = true; this.expect(types.braceL); while (!this.eat(types.braceR)) { if (first) { first = false; } else { this.expect(types.comma); if (this.eat(types.braceR)) break; } const node = this.startNode(); node.local = this.parseModuleExportName(); node.exported = this.eatContextual("as") ? this.parseModuleExportName() : node.local.__clone(); nodes.push(this.finishNode(node, "ExportSpecifier")); } return nodes; } parseModuleExportName() { if (this.match(types.string)) { this.expectPlugin("moduleStringNames"); const result = this.parseLiteral(this.state.value, "StringLiteral"); const surrogate = result.value.match(loneSurrogate); if (surrogate) { this.raise(result.start, ErrorMessages.ModuleExportNameHasLoneSurrogate, surrogate[0].charCodeAt(0).toString(16)); } return result; } return this.parseIdentifier(true); } parseImport(node) { node.specifiers = []; if (!this.match(types.string)) { const hasDefault = this.maybeParseDefaultImportSpecifier(node); const parseNext = !hasDefault || this.eat(types.comma); const hasStar = parseNext && this.maybeParseStarImportSpecifier(node); if (parseNext && !hasStar) this.parseNamedImportSpecifiers(node); this.expectContextual("from"); } node.source = this.parseImportSource(); const assertions = this.maybeParseImportAssertions(); if (assertions) { node.assertions = assertions; } else { const attributes = this.maybeParseModuleAttributes(); if (attributes) { node.attributes = attributes; } } this.semicolon(); return this.finishNode(node, "ImportDeclaration"); } parseImportSource() { if (!this.match(types.string)) this.unexpected(); return this.parseExprAtom(); } shouldParseDefaultImport(node) { return this.match(types.name); } parseImportSpecifierLocal(node, specifier, type, contextDescription) { specifier.local = this.parseIdentifier(); this.checkLVal(specifier.local, contextDescription, BIND_LEXICAL); node.specifiers.push(this.finishNode(specifier, type)); } parseAssertEntries() { const attrs = []; const attrNames = new Set(); do { if (this.match(types.braceR)) { break; } const node = this.startNode(); const keyName = this.state.value; if (this.match(types.string)) { node.key = this.parseLiteral(keyName, "StringLiteral"); } else { node.key = this.parseIdentifier(true); } this.expect(types.colon); if (keyName !== "type") { this.raise(node.key.start, ErrorMessages.ModuleAttributeDifferentFromType, keyName); } if (attrNames.has(keyName)) { this.raise(node.key.start, ErrorMessages.ModuleAttributesWithDuplicateKeys, keyName); } attrNames.add(keyName); if (!this.match(types.string)) { throw this.unexpected(this.state.start, ErrorMessages.ModuleAttributeInvalidValue); } node.value = this.parseLiteral(this.state.value, "StringLiteral"); this.finishNode(node, "ImportAttribute"); attrs.push(node); } while (this.eat(types.comma)); return attrs; } maybeParseModuleAttributes() { if (this.match(types._with) && !this.hasPrecedingLineBreak()) { this.expectPlugin("moduleAttributes"); this.next(); } else { if (this.hasPlugin("moduleAttributes")) return []; return null; } const attrs = []; const attributes = new Set(); do { const node = this.startNode(); node.key = this.parseIdentifier(true); if (node.key.name !== "type") { this.raise(node.key.start, ErrorMessages.ModuleAttributeDifferentFromType, node.key.name); } if (attributes.has(node.key.name)) { this.raise(node.key.start, ErrorMessages.ModuleAttributesWithDuplicateKeys, node.key.name); } attributes.add(node.key.name); this.expect(types.colon); if (!this.match(types.string)) { throw this.unexpected(this.state.start, ErrorMessages.ModuleAttributeInvalidValue); } node.value = this.parseLiteral(this.state.value, "StringLiteral"); this.finishNode(node, "ImportAttribute"); attrs.push(node); } while (this.eat(types.comma)); return attrs; } maybeParseImportAssertions() { if (this.isContextual("assert") && !this.hasPrecedingLineBreak()) { this.expectPlugin("importAssertions"); this.next(); } else { if (this.hasPlugin("importAssertions")) return []; return null; } this.eat(types.braceL); const attrs = this.parseAssertEntries(); this.eat(types.braceR); return attrs; } maybeParseDefaultImportSpecifier(node) { if (this.shouldParseDefaultImport(node)) { this.parseImportSpecifierLocal(node, this.startNode(), "ImportDefaultSpecifier", "default import specifier"); return true; } return false; } maybeParseStarImportSpecifier(node) { if (this.match(types.star)) { const specifier = this.startNode(); this.next(); this.expectContextual("as"); this.parseImportSpecifierLocal(node, specifier, "ImportNamespaceSpecifier", "import namespace specifier"); return true; } return false; } parseNamedImportSpecifiers(node) { let first = true; this.expect(types.braceL); while (!this.eat(types.braceR)) { if (first) { first = false; } else { if (this.eat(types.colon)) { throw this.raise(this.state.start, ErrorMessages.DestructureNamedImport); } this.expect(types.comma); if (this.eat(types.braceR)) break; } this.parseImportSpecifier(node); } } parseImportSpecifier(node) { const specifier = this.startNode(); specifier.imported = this.parseModuleExportName(); if (this.eatContextual("as")) { specifier.local = this.parseIdentifier(); } else { const { imported } = specifier; if (imported.type === "StringLiteral") { throw this.raise(specifier.start, ErrorMessages.ImportBindingIsString, imported.value); } this.checkReservedWord(imported.name, specifier.start, true, true); specifier.local = imported.__clone(); } this.checkLVal(specifier.local, "import specifier", BIND_LEXICAL); node.specifiers.push(this.finishNode(specifier, "ImportSpecifier")); } } class Parser extends StatementParser { constructor(options, input) { options = getOptions(options); super(options, input); this.options = options; this.initializeScopes(); this.plugins = pluginsMap(this.options.plugins); this.filename = options.sourceFilename; } getScopeHandler() { return ScopeHandler; } parse() { this.enterInitialScopes(); const file = this.startNode(); const program = this.startNode(); this.nextToken(); file.errors = null; this.parseTopLevel(file, program); file.errors = this.state.errors; return file; } } function pluginsMap(plugins) { const pluginMap = new Map(); for (const plugin of plugins) { const [name, options] = Array.isArray(plugin) ? plugin : [plugin, {}]; if (!pluginMap.has(name)) pluginMap.set(name, options || {}); } return pluginMap; } function parse(input, options) { var _options; if (((_options = options) == null ? void 0 : _options.sourceType) === "unambiguous") { options = Object.assign({}, options); try { options.sourceType = "module"; const parser = getParser(options, input); const ast = parser.parse(); if (parser.sawUnambiguousESM) { return ast; } if (parser.ambiguousScriptDifferentAst) { try { options.sourceType = "script"; return getParser(options, input).parse(); } catch (_unused) {} } else { ast.program.sourceType = "script"; } return ast; } catch (moduleError) { try { options.sourceType = "script"; return getParser(options, input).parse(); } catch (_unused2) {} throw moduleError; } } else { return getParser(options, input).parse(); } } function parseExpression(input, options) { const parser = getParser(options, input); if (parser.options.strictMode) { parser.state.strict = true; } return parser.getExpression(); } function getParser(options, input) { let cls = Parser; if (options != null && options.plugins) { validatePlugins(options.plugins); cls = getParserClass(options.plugins); } return new cls(options, input); } const parserClassCache = {}; function getParserClass(pluginsFromOptions) { const pluginList = mixinPluginNames.filter(name => hasPlugin(pluginsFromOptions, name)); const key = pluginList.join("/"); let cls = parserClassCache[key]; if (!cls) { cls = Parser; for (const plugin of pluginList) { cls = mixinPlugins[plugin](cls); } parserClassCache[key] = cls; } return cls; } exports.parse = parse; exports.parseExpression = parseExpression; exports.tokTypes = types; //# sourceMappingURL=index.js.map