Revert "Support unary - operator."

dart/lib/compiler/implementation/universe.dart

 // Copyright (c) 2012, 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.
 
 class Universe {
   Map<Element, CodeBuffer> generatedCode;
   Map<Element, CodeBuffer> generatedBailoutCode;
   final Set<ClassElement> instantiatedClasses;
   final Set<SourceString> instantiatedClassInstanceFields;
   final Set<FunctionElement> staticFunctionsNeedingGetter;
@@ skipping 99 matching lines @@
   Selector.getter(SourceString name, LibraryElement library)
       : this(SelectorKind.GETTER, name, library, 0);
 
   Selector.getterFrom(Selector selector)
       : this(SelectorKind.GETTER, selector.name, selector.library, 0);
 
   Selector.setter(SourceString name, LibraryElement library)
       : this(SelectorKind.SETTER, name, library, 1);
 
   Selector.unaryOperator(SourceString name)
-      : this(SelectorKind.OPERATOR,
-             Elements.constructOperatorName(name, true),
-             null, 0);
+      : this(SelectorKind.OPERATOR, operatorName(name, true), null, 0);
 
   Selector.binaryOperator(SourceString name)
-      : this(SelectorKind.OPERATOR,
-             Elements.constructOperatorName(name, false),
-             null, 1);
+      : this(SelectorKind.OPERATOR, operatorName(name, false), null, 1);
 
   Selector.index()
-      : this(SelectorKind.INDEX,
-             Elements.constructOperatorName(const SourceString("[]"), false),
-             null, 1);
+      : this(SelectorKind.INDEX, indexName(), null, 1);
 
   Selector.indexSet()
-      : this(SelectorKind.INDEX,
-             Elements.constructOperatorName(const SourceString("[]="), false),
-             null, 2);
+      : this(SelectorKind.INDEX, indexSetName(), null, 2);
 
   Selector.call(SourceString name,
                 LibraryElement library,
                 int arity,
                 [List<SourceString> named = const []])
       : this(SelectorKind.CALL, name, library, arity, named);
 
   Selector.callClosure(int arity, [List<SourceString> named = const []])
       : this(SelectorKind.CALL, Namer.CLOSURE_INVOCATION_NAME, null,
              arity, named);
@@ skipping 10 matching lines @@
   bool isSetter() => kind === SelectorKind.SETTER;
   bool isCall() => kind === SelectorKind.CALL;
 
   bool isIndex() => kind === SelectorKind.INDEX && argumentCount == 1;
   bool isIndexSet() => kind === SelectorKind.INDEX && argumentCount == 2;
 
   bool isOperator() => kind === SelectorKind.OPERATOR;
   bool isUnaryOperator() => isOperator() && argumentCount == 0;
   bool isBinaryOperator() => isOperator() && argumentCount == 1;
 
+  static SourceString operatorName(SourceString name, bool isUnary)
+      => Elements.constructOperatorName(
+             const SourceString('operator'), name, isUnary);
+
+  static SourceString indexName()
+      => operatorName(const SourceString('[]'), false);
+
+  static SourceString indexSetName()
+      => operatorName(const SourceString('[]='), false);
+
   int hashCode() => argumentCount + 1000 * namedArguments.length;
   int get namedArgumentCount => namedArguments.length;
   int get positionalArgumentCount => argumentCount - namedArgumentCount;
   Type get receiverType => null;
 
   bool applies(Element element, Compiler compiler)
       => appliesUntyped(element, compiler);
 
   bool appliesUntyped(Element element, Compiler compiler) {
     if (element.isSetter()) return isSetter();
@@ skipping 209 matching lines @@
     }
 
     return false;
   }
 
   toString() {
     return 'Selector($kind, "${name.slowToString()}", '
            '$argumentCount, type=$receiverType)';
   }
 }