Implement AstBuilder.handleOperatorName.

pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart

 // Copyright (c) 2016, 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 fasta.analyzer.ast_builder;
 
 import 'package:analyzer/analyzer.dart';
 import 'package:analyzer/dart/ast/ast_factory.dart' show AstFactory;
 import 'package:analyzer/dart/ast/standard_ast_factory.dart' as standard;
 import 'package:analyzer/dart/ast/token.dart' as analyzer show Token;
@@ skipping 1129 matching lines @@
   @override
   void endMethod(Token getOrSet, Token beginToken, Token endToken) {
     debugEvent("Method");
     FunctionBody body = _endFunctionBody();
     ConstructorName redirectedConstructor = null; // TODO(paulberry)
     List<ConstructorInitializer> initializers = null; // TODO(paulberry)
     Token separator = null; // TODO(paulberry)
     FormalParameterList parameters = pop();
     TypeParameterList typeParameters = pop(); // TODO(paulberry)
     var name = pop();
-    Token operatorKeyword = null; // TODO(paulberry)
     TypeAnnotation returnType = pop(); // TODO(paulberry)
     Token modifierKeyword = null; // TODO(paulberry)
     Token externalKeyword = null;
     Token constKeyword = null;
     Token factoryKeyword = null;
     List<Token> modifiers = pop();
     for (Token modifier in modifiers) {
       String value = modifier.stringValue;
       if (identical('external', value)) {
         // TODO(scheglov): Check the order and uniqueness.
         externalKeyword = modifier;
       } else if (identical('const', value)) {
         // TODO(scheglov): Check the order and uniqueness.
         constKeyword = modifier;
       } else if (identical('factory', value)) {
         // TODO(scheglov): Check the order and uniqueness.
         factoryKeyword = modifier;
       } else {
         // TODO(scheglov): Report error.
         internalError("Invalid modifier ($value). Report an error.");
       }
     }
 
     List<Annotation> metadata = pop();
     // TODO(paulberry): capture doc comments.  See dartbug.com/28851.
     Comment comment = null;
-    SimpleIdentifier returnType2;
     Token period;
-    SimpleIdentifier name2;
-    void unnamedConstructor() {
+    void unnamedConstructor(SimpleIdentifier returnType, SimpleIdentifier name) {
       push(ast.constructorDeclaration(
           comment,
           metadata,
           toAnalyzerToken(externalKeyword),
           toAnalyzerToken(constKeyword),
           toAnalyzerToken(factoryKeyword),
-          returnType2,
+          returnType,
           toAnalyzerToken(period),
-          name2,
+          name,
           parameters,
           toAnalyzerToken(separator),
           initializers,
           redirectedConstructor,
           body));
     }
 
-    void method() {
+    void method(Token operatorKeyword, SimpleIdentifier name) {
       push(ast.methodDeclaration(
           comment,
           metadata,
           toAnalyzerToken(externalKeyword),
           toAnalyzerToken(modifierKeyword),
           returnType,
           toAnalyzerToken(getOrSet),
           toAnalyzerToken(operatorKeyword),
           name,
           typeParameters,
           parameters,
           body));
     }
 
     if (name is SimpleIdentifier) {
-      returnType2 = name;
       if (name.name == className) {
-        unnamedConstructor();
+        unnamedConstructor(name, null);
       } else {
-        method();
+        method(null, name);
       }
+    } else if (name is _OperatorName) {
+      method(name.operatorKeyword, name.name);
     } else {
       throw new UnimplementedError();
     }
   }
 
   @override
   void endMember() {
     debugEvent("Member");
   }
 
@@ skipping 76 matching lines @@
   }
 
   @override
   void endTypeArguments(int count, Token beginToken, Token endToken) {
     debugEvent("TypeArguments");
     List<TypeAnnotation> arguments = popList(count);
     push(ast.typeArgumentList(
         toAnalyzerToken(beginToken), arguments, toAnalyzerToken(endToken)));
   }
 
+  @override
+  void handleOperatorName(Token operatorKeyword, Token token) {
+    debugEvent("OperatorName");
+    push(new _OperatorName(operatorKeyword,
+        ast.simpleIdentifier(toAnalyzerToken(token), isDeclaration: true)));
+  }
+
   /**
    * Pop the modifiers list, if the list is empty return `null`, if the list
    * has one item return it; otherwise return `null`.
    */
   Token _popOptionalSingleModifier() {
     List<Token> modifiers = pop();
     if (modifiers.length == 0) {
       return null;
     } else if (modifiers.length == 1) {
       // TODO(scheglov): Verify that the modifier is valid.
@@ skipping 58 matching lines @@
 
 /// Data structure placed on the stack as a container for optional parameters.
 class _OptionalFormalParameters {
   final List<FormalParameter> parameters;
   final Token leftDelimiter;
   final Token rightDelimiter;
 
   _OptionalFormalParameters(
       this.parameters, this.leftDelimiter, this.rightDelimiter);
 }
+
+/// Data structure placed on the stack to represent the keyword "operator"
+/// followed by a token.
+class _OperatorName {
+  final Token operatorKeyword;
+  final SimpleIdentifier name;
+
+  _OperatorName(this.operatorKeyword, this.name);
+}