Remove backends.

compiler/java/com/google/dart/compiler/backend/js/GenerateNamesAndScopes.java

Index: compiler/java/com/google/dart/compiler/backend/js/GenerateNamesAndScopes.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/GenerateNamesAndScopes.java b/compiler/java/com/google/dart/compiler/backend/js/GenerateNamesAndScopes.java
deleted file mode 100644
index 771f984ca04c403445231527fa5a393011046280..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/GenerateNamesAndScopes.java
+++ /dev/null
@@ -1,214 +0,0 @@
-// Copyright (c) 2011, 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.
-
-package com.google.dart.compiler.backend.js;
-
-import com.google.dart.compiler.ast.DartClass;
-import com.google.dart.compiler.ast.DartContext;
-import com.google.dart.compiler.ast.DartField;
-import com.google.dart.compiler.ast.DartFunction;
-import com.google.dart.compiler.ast.DartFunctionExpression;
-import com.google.dart.compiler.ast.DartLabel;
-import com.google.dart.compiler.ast.DartMethodDefinition;
-import com.google.dart.compiler.ast.DartParameter;
-import com.google.dart.compiler.ast.DartVariable;
-import com.google.dart.compiler.backend.js.ast.JsFunction;
-import com.google.dart.compiler.backend.js.ast.JsName;
-import com.google.dart.compiler.backend.js.ast.JsScope;
-import com.google.dart.compiler.common.Symbol;
-import com.google.dart.compiler.resolver.ConstructorElement;
-import com.google.dart.compiler.resolver.Elements;
-import com.google.dart.compiler.resolver.FieldElement;
-import com.google.dart.compiler.resolver.LibraryElement;
-import com.google.dart.compiler.resolver.MethodElement;
-
-import java.util.Deque;
-import java.util.LinkedList;
-
-/**
- * This visitor generates Javascript scopes and names for all the Dart nodes, filling in the
- * node->name map in 'names'.
- */
-class GenerateNamesAndScopes extends NormalizedVisitor {
-
-  /**
-   * A JsScope used to manage fields and methods. A MemberJsScope can become
-   * parentless.
-   */
-  private static class MemberJsScope extends JsScope {
-    private MemberJsScope(JsScope parent, String description) {
-      super(parent, description);
-    }
-
-    @Override
-    protected void detachFromParent() {
-      super.detachFromParent();
-    }
-  }
-
-  private final Deque<JsScope> scopes = new LinkedList<JsScope>();
-  private DartClass currentClass = null;
-  private int labelUniqifier = 0; // to resolve label name collisions.
-  private int varUniqifier = 0; // to resolve variable name collisions.
-
-  private final TranslationContext translationContext;
-  private final LibraryElement unitLibrary;
-
-  private JsScope getGlobalScope() {
-    return translationContext.getProgram().getScope();
-  }
-
-  public GenerateNamesAndScopes(TranslationContext data, LibraryElement unitLibrary) {
-    this.translationContext = data;
-    this.unitLibrary = unitLibrary;
-    scopes.push(getGlobalScope());
-  }
-
-  @Override
-  public boolean visit(DartClass x, DartContext ctx) {
-    assert currentClass == null;
-    // Global variables are declared lazily. We don't declare the class now.
-    currentClass = x;
-    // We add the member scope into the hierarchy, so that the resolution works on unqualified
-    // identifiers. Once the resolution is done, we can rip out the scope from the hierarchy.
-    scopes.push(new MemberJsScope(scopes.peek(), x.getClassName()));
-    return true;
-  }
-
-  @Override
-  public boolean visit(DartField x, DartContext ctx) {
-    FieldElement element = x.getSymbol();
-    String mangledFieldName = translationContext.getMangler().mangleField(element, unitLibrary);
-    JsName fieldName = declare(x.getSymbol(), mangledFieldName, element.getName());
-    fieldName.setObfuscatable(false);
-    return true;
-  }
-
-  public boolean generateConstructorName(DartMethodDefinition x) {
-    ConstructorElement element = (ConstructorElement) x.getSymbol();
-    String name = translationContext.getMangler().mangleConstructor(element.getName(), unitLibrary);
-    JsName jsName = function(x.getSymbol(), name, element.getName(), x.getFunction());
-    // Constructors are globally accessible.
-    jsName.setObfuscatable(false);
-    return true;
-  }
-
-  @Override
-  public boolean visit(DartMethodDefinition x, DartContext ctx) {
-    MethodElement element = x.getSymbol();
-    if (Elements.isNonFactoryConstructor(element)) {
-      return generateConstructorName(x);
-    }
-    if (x.getModifiers().isFactory()) {
-      String className = ((ConstructorElement) element).getConstructorType().getName();
-      String name = translationContext.getMangler().createFactorySyntax(className, element.getName(), unitLibrary);
-      JsName jsName = function(x.getSymbol(), name, element.getName(), x.getFunction());
-      // Factories are globally accessible.
-      jsName.setObfuscatable(false);
-      return true;
-    }
-
-    String mangledName = translationContext.getMangler().mangleMethod(element, unitLibrary);
-    JsName methodName = function(x.getSymbol(), mangledName, element.getName(), x.getFunction());
-    methodName.setObfuscatable(false);
-    return true;
-  }
-
-  @Override
-  public boolean visit(DartFunctionExpression x, DartContext ctx) {
-    function(x.getSymbol(), x.getFunctionName(), x.getFunctionName(), x.getFunction());
-    return true;
-  }
-
-  @Override
-  public boolean visit(DartParameter x, DartContext ctx) {
-    // TODO(ngeoffray): A parameter in a function type does not have a symbol.
-    if (x.getSymbol() != null) {
-      declareExclusively(x.getSymbol(), x.getParameterName());
-    }
-    return true;
-  }
-
-  @Override
-  public boolean visit(DartVariable x, DartContext ctx) {
-    declareExclusively(x.getSymbol(), x.getVariableName());
-    return true;
-  }
-
-  @Override
-  public boolean visit(DartLabel x, DartContext ctx) {
-    declareExclusively(x.getSymbol(), String.format("L%X", labelUniqifier++));
-    return true;
-  }
-
-  @Override
-  public void endVisit(DartMethodDefinition x, DartContext ctx) {
-    scopes.pop();
-  }
-
-  @Override
-  public void endVisit(DartFunctionExpression x, DartContext ctx) {
-    scopes.pop();
-  }
-
-  @Override
-  public void endVisit(DartClass x, DartContext ctx) {
-    currentClass = null;
-    // Rip out the member scope. Members are always accessed through an object and don't clash
-    // with other variables.
-    GenerateNamesAndScopes.MemberJsScope memberScope = (GenerateNamesAndScopes.MemberJsScope) scopes.pop();
-    memberScope.rebaseChildScopes(memberScope.getParent());
-    memberScope.detachFromParent();
-    translationContext.getMemberScopes().put(x.getSymbol(), memberScope);
-  }
-
-  private JsName function(Symbol symbol, String name, String originalName, DartFunction func) {
-    JsName jsName = name != null ? declareExclusively(symbol, name, originalName) : null;
-    JsFunction jsFunc = new JsFunction(scopes.peek(), jsName);
-    jsFunc.setFromDart(true);
-    scopes.push(jsFunc.getScope());
-    translationContext.getMethods().put(func, jsFunc);
-    return jsName;
-  }
-
-  private JsName declare(Symbol x, String name, String originalName) {
-    return declareInScope(scopes.peek(), x, name, originalName);
-  }
-
-  private JsName declareExclusively(Symbol x, String name, String originalName) {
-    return declareExclusivelyInScope(scopes.peek(), x, name, originalName);
-  }
-
-  private JsName declareExclusively(Symbol x, String name) {
-    return declareExclusivelyInScope(scopes.peek(), x, name, name);
-  }
-
-  private static final int BIG_PRIME_UNDER_0XFFFFF = 985531;
-
-  /**
-   * Create a unique name for this variable in this scope.
-   *
-   * Try to keep this from being a linear scan of the namespace, and keep
-   * it under 5 hex digits (over 1,000,000 unique suffixes).
-   *
-   */
-  private JsName declareExclusivelyInScope(JsScope scope, Symbol x,
-                                           String name, String originalName) {
-    String mappedName = name;
-    int offset = 0;
-    while (scope.findExistingName(mappedName) != null) {
-      mappedName = String.format("%s_%X", mappedName, varUniqifier);
-      varUniqifier = (varUniqifier + offset++) % BIG_PRIME_UNDER_0XFFFFF;
-    }
-    return declareInScope(scope, x, mappedName, originalName);
-  }
-
-  private JsName declareInScope(JsScope scope, Symbol x, String name, String originalName) {
-    JsName jsName = scope.declareName(name, name, originalName);
-    jsName.getClass(); // Fast null check.
-    x.getClass(); // Fast null check.
-    translationContext.getNames().setName(x, jsName);
-    return jsName;
-  }
-}