| 1 | 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Copyright (c) Microsoft Corporation. All rights reserved. Licensed under the MIT license.\n// See LICENSE in the project root for license information.\n\n/* eslint-disable no-bitwise */ // for ts.SymbolFlags\n\nimport * as ts from 'typescript';\nimport { PackageJsonLookup, InternalError } from '@rushstack/node-core-library';\n\nimport { AstDeclaration } from './AstDeclaration';\nimport { TypeScriptHelpers } from './TypeScriptHelpers';\nimport { AstSymbol } from './AstSymbol';\nimport { AstModule, AstModuleExportInfo } from './AstModule';\nimport { PackageMetadataManager } from './PackageMetadataManager';\nimport { ExportAnalyzer } from './ExportAnalyzer';\nimport { AstEntity } from './AstEntity';\nimport { AstNamespaceImport } from './AstNamespaceImport';\nimport { MessageRouter } from '../collector/MessageRouter';\nimport { TypeScriptInternals, IGlobalVariableAnalyzer } from './TypeScriptInternals';\nimport { SyntaxHelpers } from './SyntaxHelpers';\nimport { SourceFileLocationFormatter } from './SourceFileLocationFormatter';\n\n/**\n * Options for `AstSymbolTable._fetchAstSymbol()`\n */\nexport interface IFetchAstSymbolOptions {\n /**\n * The symbol after any symbol aliases have been followed using TypeScriptHelpers.followAliases()\n */\n followedSymbol: ts.Symbol;\n /**\n * True if followedSymbol is not part of the working package\n */\n isExternal: boolean;\n\n /**\n * If true, symbols with AstSymbol.nominalAnalysis=true will be returned.\n * Otherwise `undefined` will be returned for such symbols.\n */\n includeNominalAnalysis: boolean;\n\n /**\n * True while populating the `AstSymbolTable`; false if we're doing a passive lookup\n * without adding anything new to the table\n */\n addIfMissing: boolean;\n\n /**\n * A hint to help `_fetchAstSymbol()` determine the `AstSymbol.localName`.\n */\n localName?: string;\n}\n\n/**\n * AstSymbolTable is the workhorse that builds AstSymbol and AstDeclaration objects.\n * It maintains a cache of already constructed objects. AstSymbolTable constructs\n * AstModule objects, but otherwise the state that it maintains is agnostic of\n * any particular entry point. (For example, it does not track whether a given AstSymbol\n * is \"exported\" or not.)\n *\n * Internally, AstSymbolTable relies on ExportAnalyzer to crawl import statements and determine where symbols\n * are declared (i.e. the AstImport information needed to import them).\n */\nexport class AstSymbolTable {\n private readonly _program: ts.Program;\n private readonly _typeChecker: ts.TypeChecker;\n private readonly _messageRouter: MessageRouter;\n private readonly _globalVariableAnalyzer: IGlobalVariableAnalyzer;\n private readonly _packageMetadataManager: PackageMetadataManager;\n private readonly _exportAnalyzer: ExportAnalyzer;\n private readonly _alreadyWarnedGlobalNames: Set<string>;\n\n /**\n * A mapping from ts.Symbol --> AstSymbol\n * NOTE: The AstSymbol.followedSymbol will always be a lookup key, but additional keys\n * are possible.\n *\n * After following type aliases, we use this map to look up the corresponding AstSymbol.\n */\n private readonly _astSymbolsBySymbol: Map<ts.Symbol, AstSymbol> = new Map<ts.Symbol, AstSymbol>();\n\n /**\n * A mapping from ts.Declaration --> AstDeclaration\n */\n private readonly _astDeclarationsByDeclaration: Map<ts.Node, AstDeclaration> = new Map<\n ts.Node,\n AstDeclaration\n >();\n\n // Note that this is a mapping from specific AST nodes that we analyzed, based on the underlying symbol\n // for that node.\n private readonly _entitiesByNode: Map<ts.Identifier | ts.ImportTypeNode, AstEntity | undefined> = new Map<\n ts.Identifier,\n AstEntity | undefined\n >();\n\n public constructor(\n program: ts.Program,\n typeChecker: ts.TypeChecker,\n packageJsonLookup: PackageJsonLookup,\n bundledPackageNames: ReadonlySet<string>,\n messageRouter: MessageRouter\n ) {\n this._program = program;\n this._typeChecker = typeChecker;\n this._messageRouter = messageRouter;\n this._globalVariableAnalyzer = TypeScriptInternals.getGlobalVariableAnalyzer(program);\n this._packageMetadataManager = new PackageMetadataManager(packageJsonLookup, messageRouter);\n\n this._exportAnalyzer = new ExportAnalyzer(this._program, this._typeChecker, bundledPackageNames, {\n analyze: this.analyze.bind(this),\n fetchAstSymbol: this._fetchAstSymbol.bind(this)\n });\n\n this._alreadyWarnedGlobalNames = new Set<string>();\n }\n\n /**\n * Used to analyze an entry point that belongs to the working package.\n */\n public fetchAstModuleFromWorkingPackage(sourceFile: ts.SourceFile): AstModule {\n return this._exportAnalyzer.fetchAstModuleFromSourceFile(sourceFile, undefined, false);\n }\n\n /**\n * This crawls the specified entry point and collects the full set of exported AstSymbols.\n */\n public fetchAstModuleExportInfo(astModule: AstModule): AstModuleExportInfo {\n return this._exportAnalyzer.fetchAstModuleExportInfo(astModule);\n }\n\n /**\n * Attempts to retrieve an export by name from the specified `AstModule`.\n * Returns undefined if no match was found.\n */\n public tryGetExportOfAstModule(exportName: string, astModule: AstModule): AstEntity | undefined {\n return this._exportAnalyzer.tryGetExportOfAstModule(exportName, astModule);\n }\n\n /**\n * Ensures that AstSymbol.analyzed is true for the provided symbol. The operation\n * starts from the root symbol and then fills out all children of all declarations, and\n * also calculates AstDeclaration.referencedAstSymbols for all declarations.\n * If the symbol is not imported, any non-imported references are also analyzed.\n *\n * @remarks\n * This is an expensive operation, so we only perform it for top-level exports of an\n * the AstModule. For example, if some code references a nested class inside\n * a namespace from another library, we do not analyze any of that class's siblings\n * or members. (We do always construct its parents however, since AstDefinition.parent\n * is immutable, and needed e.g. to calculate release tag inheritance.)\n */\n public analyze(astEntity: AstEntity): void {\n if (astEntity instanceof AstSymbol) {\n return this._analyzeAstSymbol(astEntity);\n }\n\n if (astEntity instanceof AstNamespaceImport) {\n return this._analyzeAstNamespaceImport(astEntity);\n }\n }\n\n /**\n * For a given astDeclaration, this efficiently finds the child corresponding to the\n * specified ts.Node. It is assumed that AstDeclaration.isSupportedSyntaxKind() would return true for\n * that node type, and that the node is an immediate child of the provided AstDeclaration.\n */\n // NOTE: This could be a method of AstSymbol if it had a backpointer to its AstSymbolTable.\n public getChildAstDeclarationByNode(node: ts.Node, parentAstDeclaration: AstDeclaration): AstDeclaration {\n if (!parentAstDeclaration.astSymbol.analyzed) {\n throw new Error('getChildDeclarationByNode() cannot be used for an AstSymbol that was not analyzed');\n }\n\n const childAstDeclaration: AstDeclaration | undefined = this._astDeclarationsByDeclaration.get(node);\n if (!childAstDeclaration) {\n throw new Error('Child declaration not found for the specified node');\n }\n if (childAstDeclaration.parent !== parentAstDeclaration) {\n throw new InternalError('The found child is not attached to the parent AstDeclaration');\n }\n\n return childAstDeclaration;\n }\n\n /**\n * For a given ts.Identifier that is part of an AstSymbol that we analyzed, return the AstEntity that\n * it refers to. Returns undefined if it doesn't refer to anything interesting.\n * @remarks\n * Throws an Error if the ts.Identifier is not part of node tree that was analyzed.\n */\n public tryGetEntityForNode(identifier: ts.Identifier | ts.ImportTypeNode): AstEntity | undefined {\n if (!this._entitiesByNode.has(identifier)) {\n throw new InternalError('tryGetEntityForIdentifier() called for an identifier that was not analyzed');\n }\n return this._entitiesByNode.get(identifier);\n }\n\n /**\n * Builds an AstSymbol.localName for a given ts.Symbol. In the current implementation, the localName is\n * a TypeScript-like expression that may be a string literal or ECMAScript symbol expression.\n *\n * ```ts\n * class X {\n * // localName=\"identifier\"\n * public identifier: number = 1;\n * // localName=\"\\\"identifier\\\"\"\n * public \"quoted string!\": number = 2;\n * // localName=\"[MyNamespace.MySymbol]\"\n * public [MyNamespace.MySymbol]: number = 3;\n * }\n * ```\n */\n public static getLocalNameForSymbol(symbol: ts.Symbol): string {\n // TypeScript binds well-known ECMAScript symbols like \"[Symbol.iterator]\" as \"__@iterator\".\n // Decode it back into \"[Symbol.iterator]\".\n const wellKnownSymbolName: string | undefined = TypeScriptHelpers.tryDecodeWellKnownSymbolName(\n symbol.escapedName\n );\n if (wellKnownSymbolName) {\n return wellKnownSymbolName;\n }\n\n const isUniqueSymbol: boolean = TypeScriptHelpers.isUniqueSymbolName(symbol.escapedName);\n\n // We will try to obtain the name from a declaration; otherwise we'll fall back to the symbol name.\n let unquotedName: string = symbol.name;\n\n for (const declaration of symbol.declarations || []) {\n // Handle cases such as \"export default class X { }\" where the symbol name is \"default\"\n // but the local name is \"X\".\n const localSymbol: ts.Symbol | undefined = TypeScriptInternals.tryGetLocalSymbol(declaration);\n if (localSymbol) {\n unquotedName = localSymbol.name;\n }\n\n // If it is a non-well-known symbol, then return the late-bound name. For example, \"X.Y.z\" in this example:\n //\n // namespace X {\n // export namespace Y {\n // export const z: unique symbol = Symbol(\"z\");\n // }\n // }\n //\n // class C {\n // public [X.Y.z](): void { }\n // }\n //\n if (isUniqueSymbol) {\n const declarationName: ts.DeclarationName | undefined = ts.getNameOfDeclaration(declaration);\n if (declarationName && ts.isComputedPropertyName(declarationName)) {\n const lateBoundName: string | undefined = TypeScriptHelpers.tryGetLateBoundName(declarationName);\n if (lateBoundName) {\n // Here the string may contain an expression such as \"[X.Y.z]\". Names starting with \"[\" are always\n // expressions. If a string literal contains those characters, the code below will JSON.stringify() it\n // to avoid a collision.\n return lateBoundName;\n }\n }\n }\n }\n\n // Otherwise that name may come from a quoted string or pseudonym like `__constructor`.\n // If the string is not a safe identifier, then we must add quotes.\n // Note that if it was quoted but did not need to be quoted, here we will remove the quotes.\n if (!SyntaxHelpers.isSafeUnquotedMemberIdentifier(unquotedName)) {\n // For API Extractor's purposes, a canonical form is more appropriate than trying to reflect whatever\n // appeared in the source code. The code is not even guaranteed to be consistent, for example:\n //\n // class X {\n // public \"f1\"(x: string): void;\n // public f1(x: boolean): void;\n // public 'f1'(x: string | boolean): void { }\n // }\n return JSON.stringify(unquotedName);\n }\n\n return unquotedName;\n }\n\n private _analyzeAstNamespaceImport(astNamespaceImport: AstNamespaceImport): void {\n if (astNamespaceImport.analyzed) {\n return;\n }\n\n // mark before actual analyzing, to handle module cyclic reexport\n astNamespaceImport.analyzed = true;\n\n const exportedLocalEntities: Map<string, AstEntity> = this.fetchAstModuleExportInfo(\n astNamespaceImport.astModule\n ).exportedLocalEntities;\n\n for (const exportedEntity of exportedLocalEntities.values()) {\n this.analyze(exportedEntity);\n }\n }\n\n private _analyzeAstSymbol(astSymbol: AstSymbol): void {\n if (astSymbol.analyzed) {\n return;\n }\n\n if (astSymbol.nominalAnalysis) {\n // We don't analyze nominal symbols\n astSymbol._notifyAnalyzed();\n return;\n }\n\n // Start at the root of the tree\n const rootAstSymbol: AstSymbol = astSymbol.rootAstSymbol;\n\n // Calculate the full child tree for each definition\n for (const astDeclaration of rootAstSymbol.astDeclarations) {\n this._analyzeChildTree(astDeclaration.declaration, astDeclaration);\n }\n\n rootAstSymbol._notifyAnalyzed();\n\n if (!astSymbol.isExternal) {\n // If this symbol is non-external (i.e. it belongs to the working package), then we also analyze any\n // referencedAstSymbols that are non-external. For example, this ensures that forgotten exports\n // get analyzed.\n rootAstSymbol.forEachDeclarationRecursive((astDeclaration: AstDeclaration) => {\n for (const referencedAstEntity of astDeclaration.referencedAstEntities) {\n // Walk up to the root of the tree, looking for any imports along the way\n if (referencedAstEntity instanceof AstSymbol) {\n if (!referencedAstEntity.isExternal) {\n this._analyzeAstSymbol(referencedAstEntity);\n }\n }\n\n if (referencedAstEntity instanceof AstNamespaceImport) {\n if (!referencedAstEntity.astModule.isExternal) {\n this._analyzeAstNamespaceImport(referencedAstEntity);\n }\n }\n }\n });\n }\n }\n\n /**\n * Used by analyze to recursively analyze the entire child tree.\n */\n private _analyzeChildTree(node: ts.Node, governingAstDeclaration: AstDeclaration): void {\n switch (node.kind) {\n case ts.SyntaxKind.JSDocComment: // Skip JSDoc comments - TS considers @param tags TypeReference nodes\n return;\n\n // Is this a reference to another AstSymbol?\n case ts.SyntaxKind.TypeReference: // general type references\n case ts.SyntaxKind.ExpressionWithTypeArguments: // special case for e.g. the \"extends\" keyword\n case ts.SyntaxKind.ComputedPropertyName: // used for EcmaScript \"symbols\", e.g. \"[toPrimitive]\".\n case ts.SyntaxKind.TypeQuery: // represents for \"typeof X\" as a type\n {\n // Sometimes the type reference will involve multiple identifiers, e.g. \"a.b.C\".\n // In this case, we only need to worry about importing the first identifier,\n // so do a depth-first search for it:\n const identifierNode: ts.Identifier | undefined = TypeScriptHelpers.findFirstChildNode(\n node,\n ts.SyntaxKind.Identifier\n );\n\n if (identifierNode) {\n let referencedAstEntity: AstEntity | undefined = this._entitiesByNode.get(identifierNode);\n if (!referencedAstEntity) {\n const symbol: ts.Symbol | undefined = this._typeChecker.getSymbolAtLocation(identifierNode);\n if (!symbol) {\n throw new Error('Symbol not found for identifier: ' + identifierNode.getText());\n }\n\n // Normally we expect getSymbolAtLocation() to take us to a declaration within the same source\n // file, or else to an explicit \"import\" statement within the same source file. But in certain\n // situations (e.g. a global variable) the symbol will refer to a declaration in some other\n // source file. We'll call that case a \"displaced symbol\".\n //\n // For more info, see this discussion:\n // https://github.com/microsoft/rushstack/issues/1765#issuecomment-595559849\n let displacedSymbol: boolean = true;\n for (const declaration of symbol.declarations || []) {\n if (declaration.getSourceFile() === identifierNode.getSourceFile()) {\n displacedSymbol = false;\n break;\n }\n }\n\n if (displacedSymbol) {\n if (this._globalVariableAnalyzer.hasGlobalName(identifierNode.text)) {\n // If the displaced symbol is a global variable, then API Extractor simply ignores it.\n // Ambient declarations typically describe the runtime environment (provided by an API consumer),\n // so we don't bother analyzing them as an API contract. (There are probably some packages\n // that include interesting global variables in their API, but API Extractor doesn't support\n // that yet; it would be a feature request.)\n\n if (this._messageRouter.showDiagnostics) {\n if (!this._alreadyWarnedGlobalNames.has(identifierNode.text)) {\n this._alreadyWarnedGlobalNames.add(identifierNode.text);\n this._messageRouter.logDiagnostic(\n `Ignoring reference to global variable \"${identifierNode.text}\"` +\n ` in ` +\n SourceFileLocationFormatter.formatDeclaration(identifierNode)\n );\n }\n }\n } else {\n // If you encounter this, please report a bug with a repro. We're interested to know\n // how it can occur.\n throw new InternalError(`Unable to follow symbol for \"${identifierNode.text}\"`);\n }\n } else {\n referencedAstEntity = this._exportAnalyzer.fetchReferencedAstEntity(\n symbol,\n governingAstDeclaration.astSymbol.isExternal\n );\n\n this._entitiesByNode.set(identifierNode, referencedAstEntity);\n }\n }\n\n if (referencedAstEntity) {\n governingAstDeclaration._notifyReferencedAstEntity(referencedAstEntity);\n }\n }\n }\n break;\n\n // Is this the identifier for the governingAstDeclaration?\n case ts.SyntaxKind.Identifier:\n {\n const identifierNode: ts.Identifier = node as ts.Identifier;\n if (!this._entitiesByNode.has(identifierNode)) {\n const symbol: ts.Symbol | undefined = this._typeChecker.getSymbolAtLocation(identifierNode);\n\n let referencedAstEntity: AstEntity | undefined = undefined;\n\n if (symbol === governingAstDeclaration.astSymbol.followedSymbol) {\n referencedAstEntity = this._fetchEntityForNode(identifierNode, governingAstDeclaration);\n }\n\n this._entitiesByNode.set(identifierNode, referencedAstEntity);\n }\n }\n break;\n\n case ts.SyntaxKind.ImportType:\n {\n const importTypeNode: ts.ImportTypeNode = node as ts.ImportTypeNode;\n let referencedAstEntity: AstEntity | undefined = this._entitiesByNode.get(importTypeNode);\n\n if (!this._entitiesByNode.has(importTypeNode)) {\n referencedAstEntity = this._fetchEntityForNode(importTypeNode, governingAstDeclaration);\n\n if (!referencedAstEntity) {\n // This should never happen\n throw new Error('Failed to fetch entity for import() type node: ' + importTypeNode.getText());\n }\n\n this._entitiesByNode.set(importTypeNode, referencedAstEntity);\n }\n\n if (referencedAstEntity) {\n governingAstDeclaration._notifyReferencedAstEntity(referencedAstEntity);\n }\n }\n break;\n }\n\n // Is this node declaring a new AstSymbol?\n const newGoverningAstDeclaration: AstDeclaration | undefined = this._fetchAstDeclaration(\n node,\n governingAstDeclaration.astSymbol.isExternal\n );\n\n for (const childNode of node.getChildren()) {\n this._analyzeChildTree(childNode, newGoverningAstDeclaration || governingAstDeclaration);\n }\n }\n\n private _fetchEntityForNode(\n node: ts.Identifier | ts.ImportTypeNode,\n governingAstDeclaration: AstDeclaration\n ): AstEntity | undefined {\n let referencedAstEntity: AstEntity | undefined = this._entitiesByNode.get(node);\n if (!referencedAstEntity) {\n if (node.kind === ts.SyntaxKind.ImportType) {\n referencedAstEntity = this._exportAnalyzer.fetchReferencedAstEntityFromImportTypeNode(\n node,\n governingAstDeclaration.astSymbol.isExternal\n );\n } else {\n const symbol: ts.Symbol | undefined = this._typeChecker.getSymbolAtLocation(node);\n if (!symbol) {\n throw new Error('Symbol not found for identifier: ' + node.getText());\n }\n\n referencedAstEntity = this._exportAnalyzer.fetchReferencedAstEntity(\n symbol,\n governingAstDeclaration.astSymbol.isExternal\n );\n }\n\n this._entitiesByNode.set(node, referencedAstEntity);\n }\n return referencedAstEntity;\n }\n\n private _fetchAstDeclaration(node: ts.Node, isExternal: boolean): AstDeclaration | undefined {\n if (!AstDeclaration.isSupportedSyntaxKind(node.kind)) {\n return undefined;\n }\n\n const symbol: ts.Symbol | undefined = TypeScriptHelpers.getSymbolForDeclaration(\n node as ts.Declaration,\n this._typeChecker\n );\n if (!symbol) {\n throw new InternalError('Unable to find symbol for node');\n }\n\n const astSymbol: AstSymbol | undefined = this._fetchAstSymbol({\n followedSymbol: symbol,\n isExternal: isExternal,\n includeNominalAnalysis: true,\n addIfMissing: true\n });\n\n if (!astSymbol) {\n return undefined;\n }\n\n const astDeclaration: AstDeclaration | undefined = this._astDeclarationsByDeclaration.get(node);\n\n if (!astDeclaration) {\n throw new InternalError('Unable to find constructed AstDeclaration');\n }\n\n return astDeclaration;\n }\n\n private _fetchAstSymbol(options: IFetchAstSymbolOptions): AstSymbol | undefined {\n const followedSymbol: ts.Symbol = options.followedSymbol;\n\n // Filter out symbols representing constructs that we don't care about\n const arbitraryDeclaration: ts.Declaration | undefined =\n TypeScriptHelpers.tryGetADeclaration(followedSymbol);\n if (!arbitraryDeclaration) {\n return undefined;\n }\n\n if (\n followedSymbol.flags &\n (ts.SymbolFlags.TypeParameter | ts.SymbolFlags.TypeLiteral | ts.SymbolFlags.Transient)\n ) {\n if (!TypeScriptInternals.isLateBoundSymbol(followedSymbol)) {\n return undefined;\n }\n }\n\n // API Extractor doesn't analyze ambient declarations at all\n if (TypeScriptHelpers.isAmbient(followedSymbol, this._typeChecker)) {\n // We make a special exemption for ambient declarations that appear in a source file containing\n // an \"export=\" declaration that allows them to be imported as non-ambient.\n if (!this._exportAnalyzer.isImportableAmbientSourceFile(arbitraryDeclaration.getSourceFile())) {\n return undefined;\n }\n }\n\n // Make sure followedSymbol isn't an alias for something else\n if (TypeScriptHelpers.isFollowableAlias(followedSymbol, this._typeChecker)) {\n // We expect the caller to have already followed any aliases\n throw new InternalError('AstSymbolTable._fetchAstSymbol() cannot be called with a symbol alias');\n }\n\n let astSymbol: AstSymbol | undefined = this._astSymbolsBySymbol.get(followedSymbol);\n\n if (!astSymbol) {\n // None of the above lookups worked, so create a new entry...\n let nominalAnalysis: boolean = false;\n\n if (options.isExternal) {\n // If the file is from an external package that does not support AEDoc, normally we ignore it completely.\n // But in some cases (e.g. checking star exports of an external package) we need an AstSymbol to\n // represent it, but we don't need to analyze its sibling/children.\n const followedSymbolSourceFileName: string = arbitraryDeclaration.getSourceFile().fileName;\n\n if (!this._packageMetadataManager.isAedocSupportedFor(followedSymbolSourceFileName)) {\n nominalAnalysis = true;\n\n if (!options.includeNominalAnalysis) {\n return undefined;\n }\n }\n }\n\n let parentAstSymbol: AstSymbol | undefined = undefined;\n\n if (!nominalAnalysis) {\n for (const declaration of followedSymbol.declarations || []) {\n if (!AstDeclaration.isSupportedSyntaxKind(declaration.kind)) {\n throw new InternalError(\n `The \"${followedSymbol.name}\" symbol has a` +\n ` ts.SyntaxKind.${ts.SyntaxKind[declaration.kind]} declaration which is not (yet?)` +\n ` supported by API Extractor`\n );\n }\n }\n\n // We always fetch the entire chain of parents for each declaration.\n // (Children/siblings are only analyzed on demand.)\n\n // Key assumptions behind this squirrely logic:\n //\n // IF a given symbol has two declarations D1 and D2; AND\n // If D1 has a parent P1, then\n // - D2 will also have a parent P2; AND\n // - P1 and P2's symbol will be the same\n // - but P1 and P2 may be different (e.g. merged namespaces containing merged interfaces)\n\n // Is there a parent AstSymbol? First we check to see if there is a parent declaration:\n const arbitraryDeclaration: ts.Node | undefined =\n TypeScriptHelpers.tryGetADeclaration(followedSymbol);\n\n if (arbitraryDeclaration) {\n const arbitraryParentDeclaration: ts.Node | undefined =\n this._tryFindFirstAstDeclarationParent(arbitraryDeclaration);\n\n if (arbitraryParentDeclaration) {\n const parentSymbol: ts.Symbol = TypeScriptHelpers.getSymbolForDeclaration(\n arbitraryParentDeclaration as ts.Declaration,\n this._typeChecker\n );\n\n parentAstSymbol = this._fetchAstSymbol({\n followedSymbol: parentSymbol,\n isExternal: options.isExternal,\n includeNominalAnalysis: false,\n addIfMissing: true\n });\n if (!parentAstSymbol) {\n throw new InternalError('Unable to construct a parent AstSymbol for ' + followedSymbol.name);\n }\n }\n }\n }\n\n const localName: string | undefined =\n options.localName || AstSymbolTable.getLocalNameForSymbol(followedSymbol);\n\n astSymbol = new AstSymbol({\n followedSymbol: followedSymbol,\n localName: localName,\n isExternal: options.isExternal,\n nominalAnalysis: nominalAnalysis,\n parentAstSymbol: parentAstSymbol,\n rootAstSymbol: parentAstSymbol ? parentAstSymbol.rootAstSymbol : undefined\n });\n\n this._astSymbolsBySymbol.set(followedSymbol, astSymbol);\n\n // Okay, now while creating the declarations we will wire them up to the\n // their corresponding parent declarations\n for (const declaration of followedSymbol.declarations || []) {\n let parentAstDeclaration: AstDeclaration | undefined = undefined;\n if (parentAstSymbol) {\n const parentDeclaration: ts.Node | undefined = this._tryFindFirstAstDeclarationParent(declaration);\n\n if (!parentDeclaration) {\n throw new InternalError('Missing parent declaration');\n }\n\n parentAstDeclaration = this._astDeclarationsByDeclaration.get(parentDeclaration);\n if (!parentAstDeclaration) {\n throw new InternalError('Missing parent AstDeclaration');\n }\n }\n\n const astDeclaration: AstDeclaration = new AstDeclaration({\n declaration,\n astSymbol,\n parent: parentAstDeclaration\n });\n\n this._astDeclarationsByDeclaration.set(declaration, astDeclaration);\n }\n }\n\n if (options.isExternal !== astSymbol.isExternal) {\n throw new InternalError(\n `Cannot assign isExternal=${options.isExternal} for` +\n ` the symbol ${astSymbol.localName} because it was previously registered` +\n ` with isExternal=${astSymbol.isExternal}`\n );\n }\n\n return astSymbol;\n }\n\n /**\n * Returns the first parent satisfying isAstDeclaration(), or undefined if none is found.\n */\n private _tryFindFirstAstDeclarationParent(node: ts.Node): ts.Node | undefined {\n let currentNode: ts.Node | undefined = node.parent;\n while (currentNode) {\n if (AstDeclaration.isSupportedSyntaxKind(currentNode.kind)) {\n return currentNode;\n }\n currentNode = currentNode.parent;\n }\n return undefined;\n }\n}\n"]} |