diff options
Diffstat (limited to 'assets/node_modules/@babel/parser/lib/plugins/typescript/index.js')
| -rw-r--r-- | assets/node_modules/@babel/parser/lib/plugins/typescript/index.js | 2076 |
1 files changed, 2076 insertions, 0 deletions
diff --git a/assets/node_modules/@babel/parser/lib/plugins/typescript/index.js b/assets/node_modules/@babel/parser/lib/plugins/typescript/index.js new file mode 100644 index 0000000..b996a54 --- /dev/null +++ b/assets/node_modules/@babel/parser/lib/plugins/typescript/index.js @@ -0,0 +1,2076 @@ +"use strict"; + +Object.defineProperty(exports, "__esModule", { + value: true +}); +exports.default = void 0; + +var _types = require("../../tokenizer/types"); + +var _context = require("../../tokenizer/context"); + +var N = _interopRequireWildcard(require("../../types")); + +var _scopeflags = require("../../util/scopeflags"); + +var _scope = _interopRequireDefault(require("./scope")); + +function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; } + +function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; } + +function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; } + +function nonNull(x) { + if (x == null) { + throw new Error(`Unexpected ${x} value.`); + } + + return x; +} + +function assert(x) { + if (!x) { + throw new Error("Assert fail"); + } +} + +function keywordTypeFromName(value) { + switch (value) { + case "any": + return "TSAnyKeyword"; + + case "boolean": + return "TSBooleanKeyword"; + + case "bigint": + return "TSBigIntKeyword"; + + case "never": + return "TSNeverKeyword"; + + case "number": + return "TSNumberKeyword"; + + case "object": + return "TSObjectKeyword"; + + case "string": + return "TSStringKeyword"; + + case "symbol": + return "TSSymbolKeyword"; + + case "undefined": + return "TSUndefinedKeyword"; + + case "unknown": + return "TSUnknownKeyword"; + + default: + return undefined; + } +} + +var _default = superClass => class extends superClass { + getScopeHandler() { + return _scope.default; + } + + tsIsIdentifier() { + return this.match(_types.types.name); + } + + tsNextTokenCanFollowModifier() { + this.next(); + return !this.hasPrecedingLineBreak() && !this.match(_types.types.parenL) && !this.match(_types.types.parenR) && !this.match(_types.types.colon) && !this.match(_types.types.eq) && !this.match(_types.types.question) && !this.match(_types.types.bang); + } + + tsParseModifier(allowedModifiers) { + if (!this.match(_types.types.name)) { + return undefined; + } + + const modifier = this.state.value; + + if (allowedModifiers.indexOf(modifier) !== -1 && this.tsTryParse(this.tsNextTokenCanFollowModifier.bind(this))) { + return modifier; + } + + return undefined; + } + + tsParseModifiers(allowedModifiers) { + const modifiers = Object.create(null); + + while (true) { + const startPos = this.state.start; + const modifier = this.tsParseModifier(allowedModifiers); + if (!modifier) break; + + if (Object.hasOwnProperty.call(modifiers, modifier)) { + this.raise(startPos, `Duplicate modifier: '${modifier}'`); + } + + modifiers[modifier] = true; + } + + return modifiers; + } + + tsIsListTerminator(kind) { + switch (kind) { + case "EnumMembers": + case "TypeMembers": + return this.match(_types.types.braceR); + + case "HeritageClauseElement": + return this.match(_types.types.braceL); + + case "TupleElementTypes": + return this.match(_types.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 = []; + + while (true) { + if (this.tsIsListTerminator(kind)) { + break; + } + + const element = parseElement(); + + if (element == null) { + return undefined; + } + + result.push(element); + + if (this.eat(_types.types.comma)) { + continue; + } + + if (this.tsIsListTerminator(kind)) { + break; + } + + if (expectSuccess) { + this.expect(_types.types.comma); + } + + return undefined; + } + + return result; + } + + tsParseBracketedList(kind, parseElement, bracket, skipFirstToken) { + if (!skipFirstToken) { + if (bracket) { + this.expect(_types.types.bracketL); + } else { + this.expectRelational("<"); + } + } + + const result = this.tsParseDelimitedList(kind, parseElement); + + if (bracket) { + this.expect(_types.types.bracketR); + } else { + this.expectRelational(">"); + } + + return result; + } + + tsParseImportType() { + const node = this.startNode(); + this.expect(_types.types._import); + this.expect(_types.types.parenL); + + if (!this.match(_types.types.string)) { + this.raise(this.state.start, "Argument in a type import must be a string literal"); + } + + node.argument = this.parseExprAtom(); + this.expect(_types.types.parenR); + + if (this.eat(_types.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.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); + 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.types._typeof); + + if (this.match(_types.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.types._extends); + node.default = this.tsEatThenParseType(_types.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.types.jsxTagStart)) { + this.next(); + } else { + this.unexpected(); + } + + node.params = this.tsParseBracketedList("TypeParametersOrArguments", this.tsParseTypeParameter.bind(this), false, true); + return this.finishNode(node, "TSTypeParameterDeclaration"); + } + + tsTryNextParseConstantContext() { + if (this.lookahead().type === _types.types._const) { + this.next(); + return this.tsParseTypeReference(); + } + + return null; + } + + tsFillSignature(returnToken, signature) { + const returnTokenRequired = returnToken === _types.types.arrow; + signature.typeParameters = this.tsTryParseTypeParameters(); + this.expect(_types.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.types.parenR, 41).map(pattern => { + if (pattern.type !== "Identifier" && pattern.type !== "RestElement" && pattern.type !== "ObjectPattern" && pattern.type !== "ArrayPattern") { + this.raise(pattern.start, "Name in a signature must be an Identifier, ObjectPattern or ArrayPattern," + `instead got ${pattern.type}`); + } + + return pattern; + }); + } + + tsParseTypeMemberSemicolon() { + if (!this.eat(_types.types.comma)) { + this.semicolon(); + } + } + + tsParseSignatureMember(kind, node) { + this.tsFillSignature(_types.types.colon, node); + this.tsParseTypeMemberSemicolon(); + return this.finishNode(node, kind); + } + + tsIsUnambiguouslyIndexSignature() { + this.next(); + return this.eat(_types.types.name) && this.match(_types.types.colon); + } + + tsTryParseIndexSignature(node) { + if (!(this.match(_types.types.bracketL) && this.tsLookAhead(this.tsIsUnambiguouslyIndexSignature.bind(this)))) { + return undefined; + } + + this.expect(_types.types.bracketL); + const id = this.parseIdentifier(); + id.typeAnnotation = this.tsParseTypeAnnotation(); + this.resetEndLocation(id); + this.expect(_types.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.types.question)) node.optional = true; + const nodeAny = node; + + if (!readonly && (this.match(_types.types.parenL) || this.isRelational("<"))) { + const method = nodeAny; + this.tsFillSignature(_types.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.types.parenL) || this.isRelational("<")) { + return this.tsParseSignatureMember("TSCallSignatureDeclaration", node); + } + + if (this.match(_types.types._new)) { + const id = this.startNode(); + this.next(); + + if (this.match(_types.types.parenL) || this.isRelational("<")) { + return this.tsParseSignatureMember("TSConstructSignatureDeclaration", node); + } else { + node.key = this.createIdentifier(id, "new"); + return this.tsParsePropertyOrMethodSignature(node, false); + } + } + + const readonly = !!this.tsParseModifier(["readonly"]); + const idx = this.tsTryParseIndexSignature(node); + + if (idx) { + if (readonly) node.readonly = true; + return idx; + } + + this.parsePropertyName(node, false); + return this.tsParsePropertyOrMethodSignature(node, readonly); + } + + tsParseTypeLiteral() { + const node = this.startNode(); + node.members = this.tsParseObjectTypeMembers(); + return this.finishNode(node, "TSTypeLiteral"); + } + + tsParseObjectTypeMembers() { + this.expect(_types.types.braceL); + const members = this.tsParseList("TypeMembers", this.tsParseTypeMember.bind(this)); + this.expect(_types.types.braceR); + return members; + } + + tsIsStartOfMappedType() { + this.next(); + + if (this.eat(_types.types.plusMin)) { + return this.isContextual("readonly"); + } + + if (this.isContextual("readonly")) { + this.next(); + } + + if (!this.match(_types.types.bracketL)) { + return false; + } + + this.next(); + + if (!this.tsIsIdentifier()) { + return false; + } + + this.next(); + return this.match(_types.types._in); + } + + tsParseMappedTypeParameter() { + const node = this.startNode(); + node.name = this.parseIdentifierName(node.start); + node.constraint = this.tsExpectThenParseType(_types.types._in); + return this.finishNode(node, "TSTypeParameter"); + } + + tsParseMappedType() { + const node = this.startNode(); + this.expect(_types.types.braceL); + + if (this.match(_types.types.plusMin)) { + node.readonly = this.state.value; + this.next(); + this.expectContextual("readonly"); + } else if (this.eatContextual("readonly")) { + node.readonly = true; + } + + this.expect(_types.types.bracketL); + node.typeParameter = this.tsParseMappedTypeParameter(); + this.expect(_types.types.bracketR); + + if (this.match(_types.types.plusMin)) { + node.optional = this.state.value; + this.next(); + this.expect(_types.types.question); + } else if (this.eat(_types.types.question)) { + node.optional = true; + } + + node.typeAnnotation = this.tsTryParseType(); + this.semicolon(); + this.expect(_types.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; + node.elementTypes.forEach(elementNode => { + if (elementNode.type === "TSOptionalType") { + seenOptionalElement = true; + } else if (seenOptionalElement && elementNode.type !== "TSRestType") { + this.raise(elementNode.start, "A required element cannot follow an optional element."); + } + }); + return this.finishNode(node, "TSTupleType"); + } + + tsParseTupleElementType() { + if (this.match(_types.types.ellipsis)) { + const restNode = this.startNode(); + this.next(); + restNode.typeAnnotation = this.tsParseType(); + + if (this.match(_types.types.comma) && this.lookaheadCharCode() !== 93) { + this.raiseRestNotLast(this.state.start); + } + + return this.finishNode(restNode, "TSRestType"); + } + + const type = this.tsParseType(); + + if (this.eat(_types.types.question)) { + const optionalTypeNode = this.startNodeAtNode(type); + optionalTypeNode.typeAnnotation = type; + return this.finishNode(optionalTypeNode, "TSOptionalType"); + } + + return type; + } + + tsParseParenthesizedType() { + const node = this.startNode(); + this.expect(_types.types.parenL); + node.typeAnnotation = this.tsParseType(); + this.expect(_types.types.parenR); + return this.finishNode(node, "TSParenthesizedType"); + } + + tsParseFunctionOrConstructorType(type) { + const node = this.startNode(); + + if (type === "TSConstructorType") { + this.expect(_types.types._new); + } + + this.tsFillSignature(_types.types.arrow, node); + return this.finishNode(node, type); + } + + tsParseLiteralTypeNode() { + const node = this.startNode(); + + node.literal = (() => { + switch (this.state.type) { + case _types.types.num: + case _types.types.string: + case _types.types._true: + case _types.types._false: + return this.parseExprAtom(); + + default: + throw this.unexpected(); + } + })(); + + return this.finishNode(node, "TSLiteralType"); + } + + tsParseTemplateLiteralType() { + const node = this.startNode(); + const templateNode = this.parseTemplate(false); + + if (templateNode.expressions.length > 0) { + this.raise(templateNode.expressions[0].start, "Template literal types cannot have any substitution"); + } + + node.literal = templateNode; + return this.finishNode(node, "TSLiteralType"); + } + + 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.types.name: + case _types.types._void: + case _types.types._null: + { + const type = this.match(_types.types._void) ? "TSVoidKeyword" : this.match(_types.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.types.string: + case _types.types.num: + case _types.types._true: + case _types.types._false: + return this.tsParseLiteralTypeNode(); + + case _types.types.plusMin: + if (this.state.value === "-") { + const node = this.startNode(); + + if (this.lookahead().type !== _types.types.num) { + throw this.unexpected(); + } + + node.literal = this.parseMaybeUnary(); + return this.finishNode(node, "TSLiteralType"); + } + + break; + + case _types.types._this: + return this.tsParseThisTypeOrThisTypePredicate(); + + case _types.types._typeof: + return this.tsParseTypeQuery(); + + case _types.types._import: + return this.tsParseImportType(); + + case _types.types.braceL: + return this.tsLookAhead(this.tsIsStartOfMappedType.bind(this)) ? this.tsParseMappedType() : this.tsParseTypeLiteral(); + + case _types.types.bracketL: + return this.tsParseTupleType(); + + case _types.types.parenL: + return this.tsParseParenthesizedType(); + + case _types.types.backQuote: + return this.tsParseTemplateLiteralType(); + } + + throw this.unexpected(); + } + + tsParseArrayTypeOrHigher() { + let type = this.tsParseNonArrayType(); + + while (!this.hasPrecedingLineBreak() && this.eat(_types.types.bracketL)) { + if (this.match(_types.types.bracketR)) { + const node = this.startNodeAtNode(type); + node.elementType = type; + this.expect(_types.types.bracketR); + type = this.finishNode(node, "TSArrayType"); + } else { + const node = this.startNodeAtNode(type); + node.objectType = type; + node.indexType = this.tsParseType(); + this.expect(_types.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, "'readonly' type modifier is only permitted on array and tuple literal types."); + } + } + + 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) { + this.eat(operator); + let type = parseConstituentType(); + + if (this.match(operator)) { + const types = [type]; + + while (this.eat(operator)) { + types.push(parseConstituentType()); + } + + const node = this.startNodeAtNode(type); + node.types = types; + type = this.finishNode(node, kind); + } + + return type; + } + + tsParseIntersectionTypeOrHigher() { + return this.tsParseUnionOrIntersectionType("TSIntersectionType", this.tsParseTypeOperatorOrHigher.bind(this), _types.types.bitwiseAND); + } + + tsParseUnionTypeOrHigher() { + return this.tsParseUnionOrIntersectionType("TSUnionType", this.tsParseIntersectionTypeOrHigher.bind(this), _types.types.bitwiseOR); + } + + tsIsStartOfFunctionType() { + if (this.isRelational("<")) { + return true; + } + + return this.match(_types.types.parenL) && this.tsLookAhead(this.tsIsUnambiguouslyStartOfFunctionType.bind(this)); + } + + tsSkipParameterStart() { + if (this.match(_types.types.name) || this.match(_types.types._this)) { + this.next(); + return true; + } + + if (this.match(_types.types.braceL)) { + let braceStackCounter = 1; + this.next(); + + while (braceStackCounter > 0) { + if (this.match(_types.types.braceL)) { + ++braceStackCounter; + } else if (this.match(_types.types.braceR)) { + --braceStackCounter; + } + + this.next(); + } + + return true; + } + + if (this.match(_types.types.bracketL)) { + let braceStackCounter = 1; + this.next(); + + while (braceStackCounter > 0) { + if (this.match(_types.types.bracketL)) { + ++braceStackCounter; + } else if (this.match(_types.types.bracketR)) { + --braceStackCounter; + } + + this.next(); + } + + return true; + } + + return false; + } + + tsIsUnambiguouslyStartOfFunctionType() { + this.next(); + + if (this.match(_types.types.parenR) || this.match(_types.types.ellipsis)) { + return true; + } + + if (this.tsSkipParameterStart()) { + if (this.match(_types.types.colon) || this.match(_types.types.comma) || this.match(_types.types.question) || this.match(_types.types.eq)) { + return true; + } + + if (this.match(_types.types.parenR)) { + this.next(); + + if (this.match(_types.types.arrow)) { + return true; + } + } + } + + return false; + } + + tsParseTypeOrTypePredicateAnnotation(returnToken) { + return this.tsInType(() => { + const t = this.startNode(); + this.expect(returnToken); + const asserts = this.tsTryParse(this.tsParseTypePredicateAsserts.bind(this)); + + if (asserts && this.match(_types.types._this)) { + let thisTypePredicate = this.tsParseThisTypeOrThisTypePredicate(); + + if (thisTypePredicate.type === "TSThisType") { + const node = this.startNodeAtNode(t); + node.parameterName = thisTypePredicate; + node.asserts = true; + thisTypePredicate = this.finishNode(node, "TSTypePredicate"); + } else { + 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); + } + + const node = this.startNodeAtNode(t); + node.parameterName = this.parseIdentifier(); + node.asserts = asserts; + t.typeAnnotation = this.finishNode(node, "TSTypePredicate"); + return this.finishNode(t, "TSTypeAnnotation"); + } + + const type = this.tsParseTypeAnnotation(false); + const node = this.startNodeAtNode(t); + 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.types.colon) ? this.tsParseTypeOrTypePredicateAnnotation(_types.types.colon) : undefined; + } + + tsTryParseTypeAnnotation() { + return this.match(_types.types.colon) ? this.tsParseTypeAnnotation() : undefined; + } + + tsTryParseType() { + return this.tsEatThenParseType(_types.types.colon); + } + + tsParseTypePredicatePrefix() { + const id = this.parseIdentifier(); + + if (this.isContextual("is") && !this.hasPrecedingLineBreak()) { + this.next(); + return id; + } + } + + tsParseTypePredicateAsserts() { + if (!this.match(_types.types.name) || this.state.value !== "asserts" || this.hasPrecedingLineBreak()) { + return false; + } + + const containsEsc = this.state.containsEsc; + this.next(); + + if (!this.match(_types.types.name) && !this.match(_types.types._this)) { + return false; + } + + if (containsEsc) { + this.raise(this.state.lastTokStart, "Escape sequence in keyword asserts"); + } + + return true; + } + + tsParseTypeAnnotation(eatColon = true, t = this.startNode()) { + this.tsInType(() => { + if (eatColon) this.expect(_types.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.types._extends)) { + return type; + } + + const node = this.startNodeAtNode(type); + node.checkType = type; + node.extendsType = this.tsParseNonConditionalType(); + this.expect(_types.types.question); + node.trueType = this.tsParseType(); + this.expect(_types.types.colon); + node.falseType = this.tsParseType(); + return this.finishNode(node, "TSConditionalType"); + } + + tsParseNonConditionalType() { + if (this.tsIsStartOfFunctionType()) { + return this.tsParseFunctionOrConstructorType("TSFunctionType"); + } + + if (this.match(_types.types._new)) { + return this.tsParseFunctionOrConstructorType("TSConstructorType"); + } + + 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, `'${descriptor}' list cannot be empty.`); + } + + 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, _scopeflags.BIND_TS_INTERFACE, undefined, "typescript interface declaration"); + node.typeParameters = this.tsTryParseTypeParameters(); + + if (this.eat(_types.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, _scopeflags.BIND_TS_TYPE, undefined, "typescript type alias"); + node.typeParameters = this.tsTryParseTypeParameters(); + node.typeAnnotation = this.tsExpectThenParseType(_types.types.eq); + 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.types.string) ? this.parseExprAtom() : this.parseIdentifier(true); + + if (this.eat(_types.types.eq)) { + node.initializer = this.parseMaybeAssign(); + } + + return this.finishNode(node, "TSEnumMember"); + } + + tsParseEnumDeclaration(node, isConst) { + if (isConst) node.const = true; + node.id = this.parseIdentifier(); + this.checkLVal(node.id, isConst ? _scopeflags.BIND_TS_CONST_ENUM : _scopeflags.BIND_TS_ENUM, undefined, "typescript enum declaration"); + this.expect(_types.types.braceL); + node.members = this.tsParseDelimitedList("EnumMembers", this.tsParseEnumMember.bind(this)); + this.expect(_types.types.braceR); + return this.finishNode(node, "TSEnumDeclaration"); + } + + tsParseModuleBlock() { + const node = this.startNode(); + this.scope.enter(_scopeflags.SCOPE_OTHER); + this.expect(_types.types.braceL); + this.parseBlockOrModuleBlockBody(node.body = [], undefined, true, _types.types.braceR); + this.scope.exit(); + return this.finishNode(node, "TSModuleBlock"); + } + + tsParseModuleOrNamespaceDeclaration(node, nested = false) { + node.id = this.parseIdentifier(); + + if (!nested) { + this.checkLVal(node.id, _scopeflags.BIND_TS_NAMESPACE, null, "module or namespace declaration"); + } + + if (this.eat(_types.types.dot)) { + const inner = this.startNode(); + this.tsParseModuleOrNamespaceDeclaration(inner, true); + node.body = inner; + } else { + this.scope.enter(_scopeflags.SCOPE_TS_MODULE); + node.body = this.tsParseModuleBlock(); + 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.types.string)) { + node.id = this.parseExprAtom(); + } else { + this.unexpected(); + } + + if (this.match(_types.types.braceL)) { + this.scope.enter(_scopeflags.SCOPE_TS_MODULE); + node.body = this.tsParseModuleBlock(); + 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, _scopeflags.BIND_LEXICAL, undefined, "import equals declaration"); + this.expect(_types.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.types.parenL); + + if (!this.match(_types.types.string)) { + throw this.unexpected(); + } + + node.expression = this.parseExprAtom(); + this.expect(_types.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.types._var; + kind = "let"; + } + + switch (starttype) { + case _types.types._function: + return this.parseFunctionStatement(nany, false, true); + + case _types.types._class: + nany.declare = true; + return this.parseClass(nany, true, false); + + case _types.types._const: + if (this.match(_types.types._const) && this.isLookaheadContextual("enum")) { + this.expect(_types.types._const); + this.expectContextual("enum"); + return this.tsParseEnumDeclaration(nany, true); + } + + case _types.types._var: + kind = kind || this.state.value; + return this.parseVarStatement(nany, kind); + + case _types.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.types.braceL)) { + this.scope.enter(_scopeflags.SCOPE_TS_MODULE); + const mod = node; + mod.global = true; + mod.id = expr; + mod.body = this.tsParseModuleBlock(); + this.scope.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.tsCheckLineTerminatorAndMatch(_types.types._class, next)) { + const cls = node; + cls.abstract = true; + + if (next) { + this.next(); + + if (!this.match(_types.types._class)) { + this.unexpected(null, _types.types._class); + } + } + + return this.parseClass(cls, true, false); + } + + break; + + case "enum": + if (next || this.match(_types.types.name)) { + if (next) this.next(); + return this.tsParseEnumDeclaration(node, false); + } + + break; + + case "interface": + if (this.tsCheckLineTerminatorAndMatch(_types.types.name, next)) { + if (next) this.next(); + return this.tsParseInterfaceDeclaration(node); + } + + break; + + case "module": + if (next) this.next(); + + if (this.match(_types.types.string)) { + return this.tsParseAmbientExternalModuleDeclaration(node); + } else if (this.tsCheckLineTerminatorAndMatch(_types.types.name, next)) { + return this.tsParseModuleOrNamespaceDeclaration(node); + } + + break; + + case "namespace": + if (this.tsCheckLineTerminatorAndMatch(_types.types.name, next)) { + if (next) this.next(); + return this.tsParseModuleOrNamespaceDeclaration(node); + } + + break; + + case "type": + if (this.tsCheckLineTerminatorAndMatch(_types.types.name, next)) { + if (next) this.next(); + return this.tsParseTypeAliasDeclaration(node); + } + + break; + } + } + + tsCheckLineTerminatorAndMatch(tokenType, next) { + return (next || this.match(tokenType)) && !this.isLineTerminator(); + } + + tsTryParseGenericAsyncArrowFunction(startPos, startLoc) { + if (!this.isRelational("<")) { + return undefined; + } + + const res = this.tsTryParseAndCatch(() => { + const node = this.startNodeAt(startPos, startLoc); + node.typeParameters = this.tsParseTypeParameters(); + super.parseFunctionParams(node); + node.returnType = this.tsTryParseTypeOrTypePredicateAnnotation(); + this.expect(_types.types.arrow); + return node; + }); + + 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)); + })); + this.state.exprAllowed = false; + this.expectRelational(">"); + return this.finishNode(node, "TSTypeParameterInstantiation"); + } + + tsIsDeclarationStart() { + if (this.match(_types.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) { + accessibility = this.parseAccessModifier(); + readonly = !!this.tsParseModifier(["readonly"]); + } + + 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, "A parameter property may not be declared using a binding pattern."); + } + + 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.types.colon)) { + node.returnType = this.tsParseTypeOrTypePredicateAnnotation(_types.types.colon); + } + + const bodilessType = type === "FunctionDeclaration" ? "TSDeclareFunction" : type === "ClassMethod" ? "TSDeclareMethod" : undefined; + + if (bodilessType && !this.match(_types.types.braceL) && this.isLineTerminator()) { + this.finishNode(node, bodilessType); + return; + } + + super.parseFunctionBodyAndFinish(node, type, isMethod); + } + + registerFunctionStatementId(node) { + if (!node.body && node.id) { + this.checkLVal(node.id, _scopeflags.BIND_TS_AMBIENT, null, "function name"); + } else { + super.registerFunctionStatementId(...arguments); + } + } + + parseSubscript(base, startPos, startLoc, noCalls, state) { + if (!this.hasPrecedingLineBreak() && this.match(_types.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.atPossibleAsync(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.types.parenL)) { + node.arguments = this.parseCallExpressionArguments(_types.types.parenR, false); + node.typeParameters = typeArguments; + return this.finishCallExpression(node, state.optionalChainMember); + } else if (this.match(_types.types.backQuote)) { + return this.parseTaggedTemplateExpression(startPos, startLoc, base, state, typeArguments); + } + } + + 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.types.parenL)) this.unexpected(); + return args; + }); + + if (typeParameters) { + node.typeParameters = typeParameters; + } + } + + super.parseNewArguments(node); + } + + parseExprOp(left, leftStartPos, leftStartLoc, minPrec, noIn) { + if (nonNull(_types.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"); + return this.parseExprOp(node, leftStartPos, leftStartLoc, minPrec, noIn); + } + + return super.parseExprOp(left, leftStartPos, leftStartLoc, minPrec, noIn); + } + + checkReservedWord(word, startLoc, checkKeywords, isBinding) {} + + checkDuplicateExports() {} + + parseImport(node) { + if (this.match(_types.types.name) && this.lookahead().type === _types.types.eq) { + return this.tsParseImportEqualsDeclaration(node); + } + + return super.parseImport(node); + } + + parseExport(node) { + if (this.match(_types.types._import)) { + this.expect(_types.types._import); + return this.tsParseImportEqualsDeclaration(node, true); + } else if (this.eat(_types.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 { + return super.parseExport(node); + } + } + + isAbstractClass() { + return this.isContextual("abstract") && this.lookahead().type === _types.types._class; + } + + parseExportDefaultExpression() { + if (this.isAbstractClass()) { + const cls = this.startNode(); + this.next(); + this.parseClass(cls, true, true); + cls.abstract = 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.types._const) { + const ahead = this.lookahead(); + + if (ahead.type === _types.types.name && ahead.value === "enum") { + const node = this.startNode(); + this.expect(_types.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, constructorAllowsSuper) { + const accessibility = this.parseAccessModifier(); + if (accessibility) member.accessibility = accessibility; + super.parseClassMember(classBody, member, state, constructorAllowsSuper); + } + + parseClassMemberWithIsStatic(classBody, member, state, isStatic, constructorAllowsSuper) { + const modifiers = this.tsParseModifiers(["abstract", "readonly", "declare"]); + Object.assign(member, modifiers); + const idx = this.tsTryParseIndexSignature(member); + + if (idx) { + classBody.body.push(idx); + + if (modifiers.abstract) { + this.raise(member.start, "Index signatures cannot have the 'abstract' modifier"); + } + + if (isStatic) { + this.raise(member.start, "Index signatures cannot have the 'static' modifier"); + } + + if (member.accessibility) { + this.raise(member.start, `Index signatures cannot have an accessibility modifier ('${member.accessibility}')`); + } + + return; + } + + super.parseClassMemberWithIsStatic(classBody, member, state, isStatic, constructorAllowsSuper); + } + + parsePostMemberNameModifiers(methodOrProp) { + const optional = this.eat(_types.types.question); + if (optional) methodOrProp.optional = true; + + if (methodOrProp.readonly && this.match(_types.types.parenL)) { + this.raise(methodOrProp.start, "Class methods cannot have the 'readonly' modifier"); + } + + if (methodOrProp.declare && this.match(_types.types.parenL)) { + this.raise(methodOrProp.start, "Class methods cannot have the 'declare' modifier"); + } + } + + 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, noIn, startPos, startLoc, refNeedsArrowPos) { + if (!refNeedsArrowPos || !this.match(_types.types.question)) { + return super.parseConditional(expr, noIn, startPos, startLoc, refNeedsArrowPos); + } + + const result = this.tryParse(() => super.parseConditional(expr, noIn, 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.types.question)) { + node.optional = true; + this.resetEndLocation(node); + } + + if (this.match(_types.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"); + let declaration; + + if (this.match(_types.types.name)) { + declaration = this.tsTryParseExportDeclaration(); + } + + if (!declaration) { + declaration = super.parseExportDeclaration(node); + } + + 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 ? _scopeflags.BIND_TS_AMBIENT : _scopeflags.BIND_CLASS); + const typeParameters = this.tsTryParseTypeParameters(); + if (typeParameters) node.typeParameters = typeParameters; + } + + parseClassPropertyAnnotation(node) { + if (!node.optional && this.eat(_types.types.bang)) { + node.definite = true; + } + + const type = this.tsTryParseTypeAnnotation(); + if (type) node.typeAnnotation = type; + } + + parseClassProperty(node) { + this.parseClassPropertyAnnotation(node); + + if (node.declare && this.match(_types.types.equal)) { + this.raise(this.state.start, "'declare' class fields cannot have an initializer"); + } + + return super.parseClassProperty(node); + } + + parseClassPrivateProperty(node) { + if (node.abstract) { + this.raise(node.start, "Private elements cannot have the 'abstract' modifier."); + } + + if (node.accessibility) { + this.raise(node.start, `Private elements cannot have an accessibility modifier ('${node.accessibility}')`); + } + + this.parseClassPropertyAnnotation(node); + return super.parseClassPrivateProperty(node); + } + + pushClassMethod(classBody, method, isGenerator, isAsync, isConstructor, allowsDirectSuper) { + const typeParameters = this.tsTryParseTypeParameters(); + 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.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.types.colon)) { + node.returnType = this.tsParseTypeAnnotation(); + } + + return super.parseAsyncArrowFromCallExpression(node, call); + } + + parseMaybeAssign(...args) { + let state; + let jsx; + let typeCast; + + if (this.match(_types.types.jsxTagStart)) { + 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] === _context.types.j_oTag) { + context.length -= 2; + } else if (context[context.length - 1] === _context.types.j_expr) { + context.length -= 1; + } + } + + if (!(jsx && jsx.error) && !this.isRelational("<")) { + return super.parseMaybeAssign(...args); + } + + let typeParameters; + state = state || this.state.clone(); + const arrow = this.tryParse(abort => { + typeParameters = this.tsParseTypeParameters(); + const expr = super.parseMaybeAssign(...args); + + if (expr.type !== "ArrowFunctionExpression" || expr.extra && expr.extra.parenthesized) { + abort(); + } + + if (typeParameters && 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 (jsx && jsx.node) { + this.state = jsx.failState; + return jsx.node; + } + + if (arrow.node) { + this.state = arrow.failState; + return arrow.node; + } + + if (typeCast && typeCast.node) { + this.state = typeCast.failState; + return typeCast.node; + } + + if (jsx && jsx.thrown) throw jsx.error; + if (arrow.thrown) throw arrow.error; + if (typeCast && typeCast.thrown) throw typeCast.error; + throw jsx && jsx.error || arrow.error || typeCast && typeCast.error; + } + + parseMaybeUnary(refExpressionErrors) { + if (!this.hasPlugin("jsx") && this.isRelational("<")) { + return this.tsParseTypeAssertion(); + } else { + return super.parseMaybeUnary(refExpressionErrors); + } + } + + parseArrow(node) { + if (this.match(_types.types.colon)) { + const result = this.tryParse(abort => { + const returnType = this.tsParseTypeOrTypePredicateAnnotation(_types.types.colon); + if (this.canInsertSemicolon() || !this.match(_types.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.types.question)) { + if (param.type !== "Identifier") { + this.raise(param.start, "A binding pattern parameter cannot be optional in an implementation signature."); + } + + param.optional = true; + } + + const type = this.tsTryParseTypeAnnotation(); + if (type) param.typeAnnotation = type; + this.resetEndLocation(param); + return param; + } + + toAssignable(node) { + switch (node.type) { + case "TSTypeCastExpression": + return super.toAssignable(this.typeCastToParameter(node)); + + case "TSParameterProperty": + return super.toAssignable(node); + + case "TSAsExpression": + case "TSNonNullExpression": + case "TSTypeAssertion": + node.expression = this.toAssignable(node.expression); + return node; + + default: + return super.toAssignable(node); + } + } + + checkLVal(expr, bindingType = _scopeflags.BIND_NONE, checkClashes, contextDescription) { + switch (expr.type) { + case "TSTypeCastExpression": + return; + + case "TSParameterProperty": + this.checkLVal(expr.parameter, bindingType, checkClashes, "parameter property"); + return; + + case "TSAsExpression": + case "TSNonNullExpression": + case "TSTypeAssertion": + this.checkLVal(expr.expression, bindingType, checkClashes, contextDescription); + return; + + default: + super.checkLVal(expr, bindingType, checkClashes, contextDescription); + return; + } + } + + parseBindingAtom() { + switch (this.state.type) { + case _types.types._this: + return this.parseIdentifier(true); + + default: + return super.parseBindingAtom(); + } + } + + parseMaybeDecoratorArguments(expr) { + if (this.isRelational("<")) { + const typeArguments = this.tsParseTypeArguments(); + + if (this.match(_types.types.parenL)) { + const call = super.parseMaybeDecoratorArguments(expr); + call.typeParameters = typeArguments; + return call; + } + + this.unexpected(this.state.start, _types.types.parenL); + } + + return super.parseMaybeDecoratorArguments(expr); + } + + isClassMethod() { + return this.isRelational("<") || super.isClassMethod(); + } + + isClassProperty() { + return this.match(_types.types.bang) || this.match(_types.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, "Type annotations must come before default assignments, " + "e.g. instead of `age = 25: number` use `age: number = 25`"); + } + + return node; + } + + getTokenFromCode(code) { + if (this.state.inType && (code === 62 || code === 60)) { + return this.finishOp(_types.types.relational, 1); + } else { + return super.getTokenFromCode(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, "Unexpected type cast in parameter position."); + } + + 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; + } + + toReferencedList(exprList, isInParens) { + for (let i = 0; i < exprList.length; i++) { + const expr = exprList[i]; + + if (expr && expr.type === "TSTypeCastExpression") { + this.raise(expr.start, "Did not expect a type annotation here."); + } + } + + return exprList; + } + + shouldParseArrow() { + return this.match(_types.types.colon) || super.shouldParseArrow(); + } + + shouldParseAsyncArrow() { + return this.match(_types.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 firstParam = method.params[0]; + const hasContextParam = firstParam && firstParam.type === "Identifier" && firstParam.name === "this"; + return hasContextParam ? baseCount + 1 : baseCount; + } + +}; + +exports.default = _default;
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