feat(compiler-cli): reflect static methods added to classes in metadata (#21926)

PR Close #21926

packages/compiler-cli/src/metadata/collector.ts

@@ -76,6 +76,9 @@ export class MetadataCollector {
     }
 
     function recordEntry<T extends MetadataEntry>(entry: T, node: ts.Node): T {
+      if (composedSubstituter) {
+        entry = composedSubstituter(entry as MetadataValue, node) as T;
+      }
       return recordMapEntry(entry, node, nodeMap, sourceFile);
     }
 

packages/compiler-cli/src/transformers/lower_expressions.ts

@@ -10,6 +10,7 @@ import {createLoweredSymbol, isLoweredSymbol} from '@angular/compiler';
 import * as ts from 'typescript';
 
 import {CollectorOptions, MetadataCollector, MetadataValue, ModuleMetadata, isMetadataGlobalReferenceExpression} from '../metadata/index';
+import {MetadataCache, MetadataTransformer, ValueTransform} from './metadata_cache';
 
 export interface LoweringRequest {
   kind: ts.SyntaxKind;
@@ -249,35 +250,39 @@ function isLiteralFieldNamed(node: ts.Node, names: Set<string>): boolean {
 
 const LOWERABLE_FIELD_NAMES = new Set(['useValue', 'useFactory', 'data']);
 
-export class LowerMetadataCache implements RequestsMap {
+export class LowerMetadataTransform implements RequestsMap, MetadataTransformer {
-  private collector: MetadataCollector;
+  private cache: MetadataCache;
-  private metadataCache = new Map<string, MetadataAndLoweringRequests>();
+  private requests = new Map<string, RequestLocationMap>();
-
-  constructor(options: CollectorOptions, private strict?: boolean) {
-    this.collector = new MetadataCollector(options);
-  }
-
-  getMetadata(sourceFile: ts.SourceFile): ModuleMetadata|undefined {
-    return this.ensureMetadataAndRequests(sourceFile).metadata;
-  }
 
+  // RequestMap
   getRequests(sourceFile: ts.SourceFile): RequestLocationMap {
-    return this.ensureMetadataAndRequests(sourceFile).requests;
+    let result = this.requests.get(sourceFile.fileName);
-  }
-
-  private ensureMetadataAndRequests(sourceFile: ts.SourceFile): MetadataAndLoweringRequests {
-    let result = this.metadataCache.get(sourceFile.fileName);
     if (!result) {
-      result = this.getMetadataAndRequests(sourceFile);
+      // Force the metadata for this source file to be collected which
-      this.metadataCache.set(sourceFile.fileName, result);
+      // will recursively call start() populating the request map;
+      this.cache.getMetadata(sourceFile);
+
+      // If we still don't have the requested metadata, the file is not a module
+      // or is a declaration file so return an empty map.
+      result = this.requests.get(sourceFile.fileName) || new Map<number, LoweringRequest>();
     }
     return result;
   }
 
-  private getMetadataAndRequests(sourceFile: ts.SourceFile): MetadataAndLoweringRequests {
+  // MetadataTransformer
+  connect(cache: MetadataCache): void { this.cache = cache; }
+
+  start(sourceFile: ts.SourceFile): ValueTransform|undefined {
     let identNumber = 0;
     const freshIdent = () => createLoweredSymbol(identNumber++);
     const requests = new Map<number, LoweringRequest>();
+    this.requests.set(sourceFile.fileName, requests);
+
+    const replaceNode = (node: ts.Node) => {
+      const name = freshIdent();
+      requests.set(node.pos, {name, kind: node.kind, location: node.pos, end: node.end});
+      return {__symbolic: 'reference', name};
+    };
 
     const isExportedSymbol = (() => {
       let exportTable: Set<string>;
@@ -303,13 +308,8 @@ export class LowerMetadataCache implements RequestsMap {
       }
       return false;
     };
-    const replaceNode = (node: ts.Node) => {
-      const name = freshIdent();
-      requests.set(node.pos, {name, kind: node.kind, location: node.pos, end: node.end});
-      return {__symbolic: 'reference', name};
-    };
 
-    const substituteExpression = (value: MetadataValue, node: ts.Node): MetadataValue => {
+    return (value: MetadataValue, node: ts.Node): MetadataValue => {
       if (!isPrimitive(value) && !isRewritten(value)) {
         if ((node.kind === ts.SyntaxKind.ArrowFunction ||
              node.kind === ts.SyntaxKind.FunctionExpression) &&
@@ -323,18 +323,6 @@ export class LowerMetadataCache implements RequestsMap {
       }
       return value;
     };
-
-    // Do not validate or lower metadata in a declaration file. Declaration files are requested
-    // when we need to update the version of the metadata to add information that might be missing
-    // in the out-of-date version that can be recovered from the .d.ts file.
-    const declarationFile = sourceFile.isDeclarationFile;
-    const moduleFile = ts.isExternalModule(sourceFile);
-
-    const metadata = this.collector.getMetadata(
-        sourceFile, this.strict && !declarationFile,
-        moduleFile && !declarationFile ? substituteExpression : undefined);
-
-    return {metadata, requests};
   }
 }
 

packages/compiler-cli/src/transformers/metadata_cache.ts

@@ -0,0 +1,66 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import * as ts from 'typescript';
+
+import {MetadataCollector, MetadataValue, ModuleMetadata} from '../metadata/index';
+
+import {MetadataProvider} from './compiler_host';
+
+export type ValueTransform = (value: MetadataValue, node: ts.Node) => MetadataValue;
+
+export interface MetadataTransformer {
+  connect?(cache: MetadataCache): void;
+  start(sourceFile: ts.SourceFile): ValueTransform|undefined;
+}
+
+/**
+ * Cache, and potentially transform, metadata as it is being collected.
+ */
+export class MetadataCache implements MetadataProvider {
+  private metadataCache = new Map<string, ModuleMetadata|undefined>();
+
+  constructor(
+      private collector: MetadataCollector, private strict: boolean,
+      private transformers: MetadataTransformer[]) {
+    for (let transformer of transformers) {
+      if (transformer.connect) {
+        transformer.connect(this);
+      }
+    }
+  }
+
+  getMetadata(sourceFile: ts.SourceFile): ModuleMetadata|undefined {
+    if (this.metadataCache.has(sourceFile.fileName)) {
+      return this.metadataCache.get(sourceFile.fileName);
+    }
+    let substitute: ValueTransform|undefined = undefined;
+
+    // Only process transformers on modules that are not declaration files.
+    const declarationFile = sourceFile.isDeclarationFile;
+    const moduleFile = ts.isExternalModule(sourceFile);
+    if (!declarationFile && moduleFile) {
+      for (let transform of this.transformers) {
+        const transformSubstitute = transform.start(sourceFile);
+        if (transformSubstitute) {
+          if (substitute) {
+            const previous: ValueTransform = substitute;
+            substitute = (value: MetadataValue, node: ts.Node) =>
+                transformSubstitute(previous(value, node), node);
+          } else {
+            substitute = transformSubstitute;
+          }
+        }
+      }
+    }
+
+    const result = this.collector.getMetadata(sourceFile, this.strict, substitute);
+    this.metadataCache.set(sourceFile.fileName, result);
+    return result;
+  }
+}

packages/compiler-cli/src/transformers/program.ts

@@ -13,16 +13,19 @@ import * as path from 'path';
 import * as ts from 'typescript';
 
 import {TypeCheckHost, translateDiagnostics} from '../diagnostics/translate_diagnostics';
-import {ModuleMetadata, createBundleIndexHost} from '../metadata/index';
+import {MetadataCollector, ModuleMetadata, createBundleIndexHost} from '../metadata/index';
 
 import {CompilerHost, CompilerOptions, CustomTransformers, DEFAULT_ERROR_CODE, Diagnostic, DiagnosticMessageChain, EmitFlags, LazyRoute, LibrarySummary, Program, SOURCE, TsEmitArguments, TsEmitCallback} from './api';
 import {CodeGenerator, TsCompilerAotCompilerTypeCheckHostAdapter, getOriginalReferences} from './compiler_host';
-import {LowerMetadataCache, getExpressionLoweringTransformFactory} from './lower_expressions';
+import {LowerMetadataTransform, getExpressionLoweringTransformFactory} from './lower_expressions';
+import {MetadataCache, MetadataTransformer} from './metadata_cache';
 import {getAngularEmitterTransformFactory} from './node_emitter_transform';
+import {PartialModuleMetadataTransformer} from './r3_metadata_transform';
 import {getAngularClassTransformerFactory} from './r3_transform';
 import {GENERATED_FILES, StructureIsReused, createMessageDiagnostic, isInRootDir, ngToTsDiagnostic, tsStructureIsReused, userError} from './util';
 
 
+
 /**
  * Maximum number of files that are emitable via calling ts.Program.emit
  * passing individual targetSourceFiles.
@@ -43,7 +46,8 @@ const defaultEmitCallback: TsEmitCallback =
 
 class AngularCompilerProgram implements Program {
   private rootNames: string[];
-  private metadataCache: LowerMetadataCache;
+  private metadataCache: MetadataCache;
+  private loweringMetadataTransform: LowerMetadataTransform;
   private oldProgramLibrarySummaries: Map<string, LibrarySummary>|undefined;
   private oldProgramEmittedGeneratedFiles: Map<string, GeneratedFile>|undefined;
   private oldProgramEmittedSourceFiles: Map<string, ts.SourceFile>|undefined;
@@ -93,7 +97,14 @@ class AngularCompilerProgram implements Program {
         this.host = bundleHost;
       }
     }
-    this.metadataCache = new LowerMetadataCache({quotedNames: true}, !!options.strictMetadataEmit);
+    this.loweringMetadataTransform = new LowerMetadataTransform();
+    this.metadataCache = this.createMetadataCache([this.loweringMetadataTransform]);
+  }
+
+  private createMetadataCache(transformers: MetadataTransformer[]) {
+    return new MetadataCache(
+        new MetadataCollector({quotedNames: true}), !!this.options.strictMetadataEmit,
+        transformers);
   }
 
   getLibrarySummaries(): Map<string, LibrarySummary> {
@@ -183,7 +194,7 @@ class AngularCompilerProgram implements Program {
           const {tmpProgram, sourceFiles, rootNames} = this._createProgramWithBasicStubs();
           return this.compiler.loadFilesAsync(sourceFiles).then(analyzedModules => {
             if (this._analyzedModules) {
-              throw new Error('Angular structure loaded both synchronously and asynchronsly');
+              throw new Error('Angular structure loaded both synchronously and asynchronously');
             }
             this._updateProgramWithTypeCheckStubs(tmpProgram, analyzedModules, rootNames);
           });
@@ -231,7 +242,7 @@ class AngularCompilerProgram implements Program {
 
     const emitOnlyDtsFiles = (emitFlags & (EmitFlags.DTS | EmitFlags.JS)) == EmitFlags.DTS;
 
-    const tsCustomTansformers = this.calculateTransforms(
+    const tsCustomTransformers = this.calculateTransforms(
         /* genFiles */ undefined, /* partialModules */ modules, customTransformers);
 
     const emitResult = emitCallback({
@@ -239,7 +250,7 @@ class AngularCompilerProgram implements Program {
       host: this.host,
       options: this.options,
       writeFile: writeTsFile, emitOnlyDtsFiles,
-      customTransformers: tsCustomTansformers
+      customTransformers: tsCustomTransformers
     });
 
     return emitResult;
@@ -293,7 +304,7 @@ class AngularCompilerProgram implements Program {
           }
           this.writeFile(outFileName, outData, writeByteOrderMark, onError, genFile, sourceFiles);
         };
-    const tsCustomTansformers = this.calculateTransforms(
+    const tsCustomTransformers = this.calculateTransforms(
         genFileByFileName, /* partialModules */ undefined, customTransformers);
     const emitOnlyDtsFiles = (emitFlags & (EmitFlags.DTS | EmitFlags.JS)) == EmitFlags.DTS;
     // Restore the original references before we emit so TypeScript doesn't emit
@@ -330,7 +341,7 @@ class AngularCompilerProgram implements Program {
                                   host: this.host,
                                   options: this.options,
                                   writeFile: writeTsFile, emitOnlyDtsFiles,
-                                  customTransformers: tsCustomTansformers,
+                                  customTransformers: tsCustomTransformers,
                                   targetSourceFile: this.tsProgram.getSourceFile(fileName),
                                 })));
         emittedUserTsCount = sourceFilesToEmit.length;
@@ -340,7 +351,7 @@ class AngularCompilerProgram implements Program {
           host: this.host,
           options: this.options,
           writeFile: writeTsFile, emitOnlyDtsFiles,
-          customTransformers: tsCustomTansformers
+          customTransformers: tsCustomTransformers
         });
         emittedUserTsCount = this.tsProgram.getSourceFiles().length - genTsFiles.length;
       }
@@ -454,13 +465,19 @@ class AngularCompilerProgram implements Program {
       customTransformers?: CustomTransformers): ts.CustomTransformers {
     const beforeTs: ts.TransformerFactory<ts.SourceFile>[] = [];
     if (!this.options.disableExpressionLowering) {
-      beforeTs.push(getExpressionLoweringTransformFactory(this.metadataCache, this.tsProgram));
+      beforeTs.push(
+          getExpressionLoweringTransformFactory(this.loweringMetadataTransform, this.tsProgram));
     }
     if (genFiles) {
       beforeTs.push(getAngularEmitterTransformFactory(genFiles, this.getTsProgram()));
     }
     if (partialModules) {
       beforeTs.push(getAngularClassTransformerFactory(partialModules));
+
+      // If we have partial modules, the cached metadata might be incorrect as it doesn't reflect
+      // the partial module transforms.
+      this.metadataCache = this.createMetadataCache(
+          [this.loweringMetadataTransform, new PartialModuleMetadataTransformer(partialModules)]);
     }
     if (customTransformers && customTransformers.beforeTs) {
       beforeTs.push(...customTransformers.beforeTs);
@@ -505,7 +522,7 @@ class AngularCompilerProgram implements Program {
     sourceFiles: string[],
   } {
     if (this._analyzedModules) {
-      throw new Error(`Internal Error: already initalized!`);
+      throw new Error(`Internal Error: already initialized!`);
     }
     // Note: This is important to not produce a memory leak!
     const oldTsProgram = this.oldTsProgram;
@@ -522,7 +539,7 @@ class AngularCompilerProgram implements Program {
     if (this.options.generateCodeForLibraries !== false) {
       // if we should generateCodeForLibraries, never include
       // generated files in the program as otherwise we will
-      // ovewrite them and typescript will report the error
+      // overwrite them and typescript will report the error
       // TS5055: Cannot write file ... because it would overwrite input file.
       rootNames = rootNames.filter(fn => !GENERATED_FILES.test(fn));
     }
@@ -551,7 +568,7 @@ class AngularCompilerProgram implements Program {
       if (sf.fileName.endsWith('.ngfactory.ts')) {
         const {generate, baseFileName} = this.hostAdapter.shouldGenerateFile(sf.fileName);
         if (generate) {
-          // Note: ! is ok as hostAdapter.shouldGenerateFile will always return a basefileName
+          // Note: ! is ok as hostAdapter.shouldGenerateFile will always return a baseFileName
           // for .ngfactory.ts files.
           const genFile = this.compiler.emitTypeCheckStub(sf.fileName, baseFileName !);
           if (genFile) {
@@ -688,7 +705,7 @@ class AngularCompilerProgram implements Program {
       }
     }
     // Filter out generated files for which we didn't generate code.
-    // This can happen as the stub caclulation is not completely exact.
+    // This can happen as the stub calculation is not completely exact.
     // Note: sourceFile refers to the .ngfactory.ts / .ngsummary.ts file
     // node_emitter_transform already set the file contents to be empty,
     //  so this code only needs to skip the file if !allowEmptyCodegenFiles.

packages/compiler-cli/src/transformers/r3_metadata_transform.ts

@@ -0,0 +1,55 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {ClassStmt, PartialModule, Statement, StmtModifier} from '@angular/compiler';
+import * as ts from 'typescript';
+
+import {MetadataCollector, MetadataValue, ModuleMetadata, isClassMetadata} from '../metadata/index';
+
+import {MetadataTransformer, ValueTransform} from './metadata_cache';
+
+export class PartialModuleMetadataTransformer implements MetadataTransformer {
+  private moduleMap: Map<string, PartialModule>;
+
+  constructor(modules: PartialModule[]) {
+    this.moduleMap = new Map(modules.map<[string, PartialModule]>(m => [m.fileName, m]));
+  }
+
+  start(sourceFile: ts.SourceFile): ValueTransform|undefined {
+    const partialModule = this.moduleMap.get(sourceFile.fileName);
+    if (partialModule) {
+      const classMap = new Map<string, ClassStmt>(
+          partialModule.statements.filter(isClassStmt).map<[string, ClassStmt]>(s => [s.name, s]));
+      if (classMap.size > 0) {
+        return (value: MetadataValue, node: ts.Node): MetadataValue => {
+          // For class metadata that is going to be transformed to have a static method ensure the
+          // metadata contains a static declaration the new static method.
+          if (isClassMetadata(value) && node.kind === ts.SyntaxKind.ClassDeclaration) {
+            const classDeclaration = node as ts.ClassDeclaration;
+            if (classDeclaration.name) {
+              const partialClass = classMap.get(classDeclaration.name.text);
+              if (partialClass) {
+                for (const field of partialClass.fields) {
+                  if (field.name && field.modifiers &&
+                      field.modifiers.some(modifier => modifier === StmtModifier.Static)) {
+                    value.statics = {...(value.statics || {}), [field.name]: {}};
+                  }
+                }
+              }
+            }
+          }
+          return value;
+        };
+      }
+    }
+  }
+}
+
+function isClassStmt(v: Statement): v is ClassStmt {
+  return v instanceof ClassStmt;
+}

packages/compiler-cli/test/transformers/lower_expressions_spec.ts

@@ -8,8 +8,9 @@
 
 import * as ts from 'typescript';
 
-import {ModuleMetadata} from '../../src/metadata/index';
+import {MetadataCollector, ModuleMetadata} from '../../src/metadata/index';
-import {LowerMetadataCache, LoweringRequest, RequestLocationMap, getExpressionLoweringTransformFactory} from '../../src/transformers/lower_expressions';
+import {LowerMetadataTransform, LoweringRequest, RequestLocationMap, getExpressionLoweringTransformFactory} from '../../src/transformers/lower_expressions';
+import {MetadataCache} from '../../src/transformers/metadata_cache';
 import {Directory, MockAotContext, MockCompilerHost} from '../mocks';
 
 describe('Expression lowering', () => {
@@ -110,7 +111,8 @@ describe('Expression lowering', () => {
     });
 
     it('should throw a validation exception for invalid files', () => {
-      const cache = new LowerMetadataCache({}, /* strict */ true);
+      const cache = new MetadataCache(
+          new MetadataCollector({}), /* strict */ true, [new LowerMetadataTransform()]);
       const sourceFile = ts.createSourceFile(
           'foo.ts', `
         import {Injectable} from '@angular/core';
@@ -126,7 +128,8 @@ describe('Expression lowering', () => {
     });
 
     it('should not report validation errors on a .d.ts file', () => {
-      const cache = new LowerMetadataCache({}, /* strict */ true);
+      const cache = new MetadataCache(
+          new MetadataCollector({}), /* strict */ true, [new LowerMetadataTransform()]);
       const dtsFile = ts.createSourceFile(
           'foo.d.ts', `
         import {Injectable} from '@angular/core';
@@ -241,11 +244,12 @@ function normalizeResult(result: string): string {
 
 function collect(annotatedSource: string) {
   const {annotations, unannotatedSource} = getAnnotations(annotatedSource);
-  const cache = new LowerMetadataCache({});
+  const transformer = new LowerMetadataTransform();
+  const cache = new MetadataCache(new MetadataCollector({}), false, [transformer]);
   const sourceFile = ts.createSourceFile(
       'someName.ts', unannotatedSource, ts.ScriptTarget.Latest, /* setParentNodes */ true);
   return {
     metadata: cache.getMetadata(sourceFile),
-    requests: cache.getRequests(sourceFile), annotations
+    requests: transformer.getRequests(sourceFile), annotations
   };
 }

packages/compiler-cli/test/transformers/r3_metadata_transform_spec.ts

@@ -0,0 +1,58 @@
+/**
+ * @license
+ * Copyright Google Inc. All Rights Reserved.
+ *
+ * Use of this source code is governed by an MIT-style license that can be
+ * found in the LICENSE file at https://angular.io/license
+ */
+
+import {ClassField, ClassMethod, ClassStmt, PartialModule, Statement, StmtModifier} from '@angular/compiler';
+import * as ts from 'typescript';
+
+import {MetadataCollector, isClassMetadata} from '../../src/metadata/index';
+import {MetadataCache} from '../../src/transformers/metadata_cache';
+import {PartialModuleMetadataTransformer} from '../../src/transformers/r3_metadata_transform';
+
+describe('r3_transform_spec', () => {
+
+  it('should add a static method to collected metadata', () => {
+    const fileName = '/some/directory/someFileName.ts';
+    const className = 'SomeClass';
+    const newFieldName = 'newStaticField';
+    const source = `
+      export class ${className} {
+        myMethod(): void {}
+      }
+    `;
+
+    const sourceFile =
+        ts.createSourceFile(fileName, source, ts.ScriptTarget.Latest, /* setParentNodes */ true);
+    const partialModule: PartialModule = {
+      fileName,
+      statements: [new ClassStmt(
+          className, /* parent */ null, /* fields */[new ClassField(
+              /* name */ newFieldName, /* type */ null, /* modifiers */[StmtModifier.Static])],
+          /* getters */[],
+          /* constructorMethod */ new ClassMethod(/* name */ null, /* params */[], /* body */[]),
+          /* methods */[])]
+    };
+
+    const cache = new MetadataCache(
+        new MetadataCollector(), /* strict */ true,
+        [new PartialModuleMetadataTransformer([partialModule])]);
+    const metadata = cache.getMetadata(sourceFile);
+    expect(metadata).toBeDefined('Expected metadata from test source file');
+    if (metadata) {
+      const classData = metadata.metadata[className];
+      expect(classData && isClassMetadata(classData))
+          .toBeDefined(`Expected metadata to contain data for "${className}"`);
+      if (classData && isClassMetadata(classData)) {
+        const statics = classData.statics;
+        expect(statics).toBeDefined(`Expected "${className}" metadata to contain statics`);
+        if (statics) {
+          expect(statics[newFieldName]).toEqual({}, 'Expected new field to recorded as a function');
+        }
+      }
+    }
+  });
+});

packages/compiler/src/compiler.ts

@@ -67,7 +67,7 @@ export * from './ml_parser/html_tags';
 export * from './ml_parser/interpolation_config';
 export * from './ml_parser/tags';
 export {NgModuleCompiler} from './ng_module_compiler';
-export {AssertNotNull, BinaryOperator, BinaryOperatorExpr, BuiltinMethod, BuiltinVar, CastExpr, ClassMethod, ClassStmt, CommaExpr, CommentStmt, ConditionalExpr, DeclareFunctionStmt, DeclareVarStmt, ExpressionStatement, ExpressionVisitor, ExternalExpr, ExternalReference, FunctionExpr, IfStmt, InstantiateExpr, InvokeFunctionExpr, InvokeMethodExpr, LiteralArrayExpr, LiteralExpr, LiteralMapExpr, NotExpr, ReadKeyExpr, ReadPropExpr, ReadVarExpr, ReturnStatement, StatementVisitor, ThrowStmt, TryCatchStmt, WriteKeyExpr, WritePropExpr, WriteVarExpr, StmtModifier, Statement, collectExternalReferences} from './output/output_ast';
+export {AssertNotNull, BinaryOperator, BinaryOperatorExpr, BuiltinMethod, BuiltinVar, CastExpr, ClassField, ClassMethod, ClassStmt, CommaExpr, CommentStmt, ConditionalExpr, DeclareFunctionStmt, DeclareVarStmt, ExpressionStatement, ExpressionVisitor, ExternalExpr, ExternalReference, FunctionExpr, IfStmt, InstantiateExpr, InvokeFunctionExpr, InvokeMethodExpr, LiteralArrayExpr, LiteralExpr, LiteralMapExpr, NotExpr, ReadKeyExpr, ReadPropExpr, ReadVarExpr, ReturnStatement, StatementVisitor, ThrowStmt, TryCatchStmt, WriteKeyExpr, WritePropExpr, WriteVarExpr, StmtModifier, Statement, collectExternalReferences} from './output/output_ast';
 export {EmitterVisitorContext} from './output/abstract_emitter';
 export * from './output/ts_emitter';
 export * from './parse_util';