Refactor IrBuilder to use SemanticVisitor.

pkg/compiler/lib/src/resolution/operators.dart

 // Copyright (c) 2015, 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.
 
 library dart2js.operators;
 
 enum UnaryOperatorKind {
   NOT,
   NEGATE,
   COMPLEMENT,
@@ skipping 187 matching lines @@
 
 class AssignmentOperator {
   final AssignmentOperatorKind kind;
   final BinaryOperator binaryOperator;
   final String name;
   final bool isUserDefinable;
 
   const AssignmentOperator._(this.kind, this.name, this.binaryOperator,
                              {this.isUserDefinable: true});
 
+  String get selectorName {
+    return binaryOperator != null ? binaryOperator.selectorName: null;
+  }
+
   String toString() => name;
 
   /// The = operator.
   static const AssignmentOperator ASSIGN =
       const AssignmentOperator._(AssignmentOperatorKind.ASSIGN, '=',
                                  null, isUserDefinable: false);
 
   /// The += assignment operator.
   static const AssignmentOperator ADD =
       const AssignmentOperator._(AssignmentOperatorKind.ADD, '+=',
@@ skipping 69 matching lines @@
 }
 
 
 enum IncDecOperatorKind {
   INC, DEC
 }
 
 class IncDecOperator {
   final IncDecOperatorKind kind;
   final String name;
+  final BinaryOperator binaryOperator;
 
-  const IncDecOperator._(this.kind, this.name);
+  const IncDecOperator._(this.kind, this.name, this.binaryOperator);
+
+  String get selectorName => binaryOperator.selectorName;
 
   String toString() => name;
 
   /// The prefix/postfix ++ operator.
   static const IncDecOperator INC =
-      const IncDecOperator._(IncDecOperatorKind.INC, '++');
+      const IncDecOperator._(IncDecOperatorKind.INC, '++', BinaryOperator.ADD);
 
   /// The prefix/postfix -- operator.
   static const IncDecOperator DEC =
-      const IncDecOperator._(IncDecOperatorKind.DEC, '--');
+      const IncDecOperator._(IncDecOperatorKind.DEC, '--', BinaryOperator.SUB);
 
   static IncDecOperator parse(String value) {
     switch (value) {
       case '++': return INC;
       case '--': return DEC;
       default: return null;
     }
   }
 }