Remove backends.

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

Index: compiler/java/com/google/dart/compiler/backend/js/JsPrecedenceVisitor.java
diff --git a/compiler/java/com/google/dart/compiler/backend/js/JsPrecedenceVisitor.java b/compiler/java/com/google/dart/compiler/backend/js/JsPrecedenceVisitor.java
deleted file mode 100644
index 4b306872f7efe190696d3658a882ee8081ef51fa..0000000000000000000000000000000000000000
--- a/compiler/java/com/google/dart/compiler/backend/js/JsPrecedenceVisitor.java
+++ /dev/null
@@ -1,317 +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.backend.js.ast.JsArrayAccess;
-import com.google.dart.compiler.backend.js.ast.JsArrayLiteral;
-import com.google.dart.compiler.backend.js.ast.JsBinaryOperation;
-import com.google.dart.compiler.backend.js.ast.JsBlock;
-import com.google.dart.compiler.backend.js.ast.JsBooleanLiteral;
-import com.google.dart.compiler.backend.js.ast.JsBreak;
-import com.google.dart.compiler.backend.js.ast.JsCase;
-import com.google.dart.compiler.backend.js.ast.JsCatch;
-import com.google.dart.compiler.backend.js.ast.JsConditional;
-import com.google.dart.compiler.backend.js.ast.JsContext;
-import com.google.dart.compiler.backend.js.ast.JsContinue;
-import com.google.dart.compiler.backend.js.ast.JsDebugger;
-import com.google.dart.compiler.backend.js.ast.JsDefault;
-import com.google.dart.compiler.backend.js.ast.JsDoWhile;
-import com.google.dart.compiler.backend.js.ast.JsEmpty;
-import com.google.dart.compiler.backend.js.ast.JsExprStmt;
-import com.google.dart.compiler.backend.js.ast.JsExpression;
-import com.google.dart.compiler.backend.js.ast.JsFor;
-import com.google.dart.compiler.backend.js.ast.JsForIn;
-import com.google.dart.compiler.backend.js.ast.JsFunction;
-import com.google.dart.compiler.backend.js.ast.JsIf;
-import com.google.dart.compiler.backend.js.ast.JsInvocation;
-import com.google.dart.compiler.backend.js.ast.JsLabel;
-import com.google.dart.compiler.backend.js.ast.JsNameRef;
-import com.google.dart.compiler.backend.js.ast.JsNew;
-import com.google.dart.compiler.backend.js.ast.JsNullLiteral;
-import com.google.dart.compiler.backend.js.ast.JsNumberLiteral;
-import com.google.dart.compiler.backend.js.ast.JsObjectLiteral;
-import com.google.dart.compiler.backend.js.ast.JsParameter;
-import com.google.dart.compiler.backend.js.ast.JsPostfixOperation;
-import com.google.dart.compiler.backend.js.ast.JsPrefixOperation;
-import com.google.dart.compiler.backend.js.ast.JsProgram;
-import com.google.dart.compiler.backend.js.ast.JsPropertyInitializer;
-import com.google.dart.compiler.backend.js.ast.JsRegExp;
-import com.google.dart.compiler.backend.js.ast.JsReturn;
-import com.google.dart.compiler.backend.js.ast.JsStringLiteral;
-import com.google.dart.compiler.backend.js.ast.JsSwitch;
-import com.google.dart.compiler.backend.js.ast.JsThisRef;
-import com.google.dart.compiler.backend.js.ast.JsThrow;
-import com.google.dart.compiler.backend.js.ast.JsTry;
-import com.google.dart.compiler.backend.js.ast.JsVars;
-import com.google.dart.compiler.backend.js.ast.JsVisitor;
-import com.google.dart.compiler.backend.js.ast.JsWhile;
-import com.google.dart.compiler.backend.js.ast.JsVars.JsVar;
-
-/**
- * Precedence indices from "JavaScript - The Definitive Guide" 4th Edition (page
- * 57)
- *
- * Precedence 17 is for indivisible primaries that either don't have children,
- * or provide their own delimiters.
- *
- * Precedence 16 is for really important things that have their own AST classes.
- *
- * Precedence 15 is for the new construct.
- *
- * Precedence 14 is for unary operators.
- *
- * Precedences 12 through 4 are for non-assigning binary operators.
- *
- * Precedence 3 is for the tertiary conditional.
- *
- * Precedence 2 is for assignments.
- *
- * Precedence 1 is for comma operations.
- */
-class JsPrecedenceVisitor extends JsVisitor {
-
-  static final int PRECEDENCE_NEW = 15;
-
-  public static int exec(JsExpression expression) {
-    JsPrecedenceVisitor visitor = new JsPrecedenceVisitor();
-    visitor.accept(expression);
-    if (visitor.answer < 0) {
-      throw new RuntimeException("Precedence must be >= 0!");
-    }
-    return visitor.answer;
-  }
-
-  private int answer = -1;
-
-  private JsPrecedenceVisitor() {
-  }
-
-  @Override
-  public boolean visit(JsArrayAccess x, JsContext ctx) {
-    answer = 16;
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsArrayLiteral x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsBinaryOperation x, JsContext ctx) {
-    answer = x.getOperator().getPrecedence();
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsBlock x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsBooleanLiteral x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsBreak x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsCase x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsCatch x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsConditional x, JsContext ctx) {
-    answer = 3;
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsContinue x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsDebugger x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsDefault x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsDoWhile x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsEmpty x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsExprStmt x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsFor x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsForIn x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsFunction x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsIf x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsInvocation x, JsContext ctx) {
-    answer = 16;
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsLabel x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsNameRef x, JsContext ctx) {
-    if (x.isLeaf()) {
-      answer = 17; // primary
-    } else {
-      answer = 16; // property access
-    }
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsNew x, JsContext ctx) {
-    answer = PRECEDENCE_NEW;
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsNullLiteral x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsNumberLiteral x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsObjectLiteral x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsParameter x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsPostfixOperation x, JsContext ctx) {
-    answer = x.getOperator().getPrecedence();
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsPrefixOperation x, JsContext ctx) {
-    answer = x.getOperator().getPrecedence();
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsProgram x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsPropertyInitializer x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsRegExp x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsReturn x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsStringLiteral x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsSwitch x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsThisRef x, JsContext ctx) {
-    answer = 17; // primary
-    return false;
-  }
-
-  @Override
-  public boolean visit(JsThrow x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsTry x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsVar x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsVars x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-
-  @Override
-  public boolean visit(JsWhile x, JsContext ctx) {
-    throw new RuntimeException("Only expressions have precedence.");
-  }
-}