Move dart2js from sdk/lib/_internal/compiler to pkg/compiler

sdk/lib/_internal/compiler/implementation/js_emitter/old_emitter/interceptor_emitter.dart

-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-
-part of dart2js.js_emitter;
-
-class InterceptorEmitter extends CodeEmitterHelper {
-  final Set<String> interceptorInvocationNames = new Set<String>();
-
-  void recordMangledNameOfMemberMethod(FunctionElement member, String name) {
-    if (backend.isInterceptedMethod(member)) {
-      interceptorInvocationNames.add(name);
-    }
-  }
-
-  void emitGetInterceptorMethod(CodeBuffer buffer,
-                                String key,
-                                Set<ClassElement> classes) {
-    InterceptorStubGenerator stubGenerator =
-        new InterceptorStubGenerator(compiler, namer, backend);
-    jsAst.Expression function =
-        stubGenerator.generateGetInterceptorMethod(classes);
-
-    buffer.write(jsAst.prettyPrint(
-        js('${namer.globalObjectFor(backend.interceptorsLibrary)}.# = #',
-           [key, function]),
-        compiler));
-    buffer.write(N);
-  }
-
-  /**
-   * Emit all versions of the [:getInterceptor:] method.
-   */
-  void emitGetInterceptorMethods(CodeBuffer buffer) {
-    emitter.addComment('getInterceptor methods', buffer);
-    Map<String, Set<ClassElement>> specializedGetInterceptors =
-        backend.specializedGetInterceptors;
-    for (String name in specializedGetInterceptors.keys.toList()..sort()) {
-      Set<ClassElement> classes = specializedGetInterceptors[name];
-      emitGetInterceptorMethod(buffer, name, classes);
-    }
-  }
-
-  void emitOneShotInterceptors(CodeBuffer buffer) {
-    List<String> names = backend.oneShotInterceptors.keys.toList();
-    names.sort();
-
-    InterceptorStubGenerator stubGenerator =
-        new InterceptorStubGenerator(compiler, namer, backend);
-    String globalObject = namer.globalObjectFor(backend.interceptorsLibrary);
-    for (String name in names) {
-      jsAst.Expression function =
-          stubGenerator.generateOneShotInterceptor(name);
-      jsAst.Expression assignment =
-          js('${globalObject}.# = #', [name, function]);
-
-      buffer.write(jsAst.prettyPrint(assignment, compiler));
-      buffer.write(N);
-    }
-  }
-
-  /**
-   * If [JSInvocationMirror._invokeOn] has been compiled, emit all the
-   * possible selector names that are intercepted into the
-   * [interceptedNames] top-level variable. The implementation of
-   * [_invokeOn] will use it to determine whether it should call the
-   * method with an extra parameter.
-   */
-  void emitInterceptedNames(CodeBuffer buffer) {
-    // TODO(ahe): We should not generate the list of intercepted names at
-    // compile time, it can be generated automatically at runtime given
-    // subclasses of Interceptor (which can easily be identified).
-    if (!compiler.enabledInvokeOn) return;
-
-    // TODO(ahe): We should roll this into
-    // [emitStaticNonFinalFieldInitializations].
-    String name = backend.namer.getNameOfGlobalField(backend.interceptedNames);
-
-    int index = 0;
-    var invocationNames = interceptorInvocationNames.toList()..sort();
-    List<jsAst.ArrayElement> elements = invocationNames.map(
-      (String invocationName) {
-        jsAst.Literal str = js.string(invocationName);
-        return new jsAst.ArrayElement(index++, str);
-      }).toList();
-    jsAst.ArrayInitializer array =
-        new jsAst.ArrayInitializer(invocationNames.length, elements);
-
-    jsAst.Expression assignment =
-        js('${emitter.isolateProperties}.# = #', [name, array]);
-
-    buffer.write(jsAst.prettyPrint(assignment, compiler));
-    buffer.write(N);
-  }
-
-  /**
-   * Emit initializer for [mapTypeToInterceptor] data structure used by
-   * [findInterceptorForType].  See declaration of [mapTypeToInterceptor] in
-   * `interceptors.dart`.
-   */
-  void emitMapTypeToInterceptor(CodeBuffer buffer) {
-    // TODO(sra): Perhaps inject a constant instead?
-    CustomElementsAnalysis analysis = backend.customElementsAnalysis;
-    if (!analysis.needsTable) return;
-
-    List<jsAst.Expression> elements = <jsAst.Expression>[];
-    JavaScriptConstantCompiler handler = backend.constants;
-    List<ConstantValue> constants =
-        handler.getConstantsForEmission(emitter.compareConstants);
-    for (ConstantValue constant in constants) {
-      if (constant is TypeConstantValue) {
-        TypeConstantValue typeConstant = constant;
-        Element element = typeConstant.representedType.element;
-        if (element is ClassElement) {
-          ClassElement classElement = element;
-          if (!analysis.needsClass(classElement)) continue;
-
-          elements.add(emitter.constantReference(constant));
-          elements.add(namer.elementAccess(classElement));
-
-          // Create JavaScript Object map for by-name lookup of generative
-          // constructors.  For example, the class A has three generative
-          // constructors
-          //
-          //     class A {
-          //       A() {}
-          //       A.foo() {}
-          //       A.bar() {}
-          //     }
-          //
-          // Which are described by the map
-          //
-          //     {"": A.A$, "foo": A.A$foo, "bar": A.A$bar}
-          //
-          // We expect most of the time the map will be a singleton.
-          var properties = [];
-          for (Element member in analysis.constructors(classElement)) {
-            properties.add(
-                new jsAst.Property(
-                    js.string(member.name),
-                    backend.namer.elementAccess(member)));
-          }
-
-          var map = new jsAst.ObjectInitializer(properties);
-          elements.add(map);
-        }
-      }
-    }
-
-    jsAst.ArrayInitializer array = new jsAst.ArrayInitializer.from(elements);
-    String name =
-        backend.namer.getNameOfGlobalField(backend.mapTypeToInterceptor);
-    jsAst.Expression assignment =
-        js('${emitter.isolateProperties}.# = #', [name, array]);
-
-    buffer.write(jsAst.prettyPrint(assignment, compiler));
-    buffer.write(N);
-  }
-}