Add preliminary support for method declarations to AstBuilder.

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 1107 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)
+    TypeParameterList typeParameters = pop(); // TODO(paulberry)
     var name = pop();
-    // TODO(paulberry)
-    // analyzer.Token propertyKeyword = toAnalyzerToken(getOrSet);
-    /* TypeAnnotation returnType = */ pop(); // TODO(paulberry)
-
+    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() {
+      push(ast.constructorDeclaration(
+          comment,
+          metadata,
+          toAnalyzerToken(externalKeyword),
+          toAnalyzerToken(constKeyword),
+          toAnalyzerToken(factoryKeyword),
+          returnType2,
+          toAnalyzerToken(period),
+          name2,
+          parameters,
+          toAnalyzerToken(separator),
+          initializers,
+          redirectedConstructor,
+          body));
+    }
+
+    void method() {
+      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();
+      } else {
+        method();
+      }
+    } else {
+      throw new UnimplementedError();
     }
-    push(ast.constructorDeclaration(
-        comment,
-        metadata,
-        toAnalyzerToken(externalKeyword),
-        toAnalyzerToken(constKeyword),
-        toAnalyzerToken(factoryKeyword),
-        returnType2,
-        toAnalyzerToken(period),
-        name2,
-        parameters,
-        toAnalyzerToken(separator),
-        initializers,
-        redirectedConstructor,
-        body));
   }
 
   @override
   void endMember() {
     debugEvent("Member");
   }
 
   @override
   void handleVoidKeyword(Token token) {
     debugEvent("VoidKeyword");
@@ skipping 151 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);
 }