Parse for-in statements with Fasta.

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 636 matching lines @@
     TypeAnnotation returnType = pop();
     push(ast.genericFunctionType(returnType, toAnalyzerToken(functionToken),
         typeParameters, parameters));
   }
 
   void handleFormalParameterWithoutValue(Token token) {
     debugEvent("FormalParameterWithoutValue");
     push(NullValue.ParameterDefaultValue);
   }
 
+  @override
+  void endForInExpression(Token token) {
+    debugEvent("ForInExpression");
+  }
+
+  @override
+  void endForIn(Token awaitToken, Token forToken, Token leftParenthesis,
+      Token inKeyword, Token rightParenthesis, Token endToken) {
+    debugEvent("ForInExpression");
+    Statement body = pop();
+    Expression iterator = pop();
+    Object variableOrDeclaration = pop();
+    pop(); // local scope
+    pop(); // continue target
+    pop(); // break target
+    if (variableOrDeclaration is SimpleIdentifier) {
+      push(ast.forEachStatementWithReference(
+          toAnalyzerToken(awaitToken),
+          toAnalyzerToken(forToken),
+          toAnalyzerToken(leftParenthesis),
+          variableOrDeclaration,
+          toAnalyzerToken(inKeyword),
+          iterator,
+          toAnalyzerToken(rightParenthesis),
+          body));
+    } else {
+      var statement = variableOrDeclaration as VariableDeclarationStatement;
+      VariableDeclarationList variableList = statement.variables;
+      push(ast.forEachStatementWithDeclaration(
+          toAnalyzerToken(awaitToken),
+          toAnalyzerToken(forToken),
+          toAnalyzerToken(leftParenthesis),
+          ast.declaredIdentifier(
+              variableList.documentationComment,
+              variableList.metadata,
+              variableList.keyword,
+              variableList.type,
+              variableList.variables.single.name),
+          toAnalyzerToken(inKeyword),
+          iterator,
+          toAnalyzerToken(rightParenthesis),
+          body));
+    }
+  }
+
   void endFormalParameter(
       Token covariantKeyword, Token thisKeyword, FormalParameterType kind) {
     debugEvent("FormalParameter");
     _ParameterDefaultValue defaultValue = pop();
 
     AstNode nameOrFunctionTypedParameter = pop();
 
     FormalParameter node;
     SimpleIdentifier name;
     if (nameOrFunctionTypedParameter is FormalParameter) {
@@ skipping 979 matching lines @@
       } else if (identical('static', s)) {
         staticKeyword = token;
       } else if (identical('var', s)) {
         finalConstOrVarKeyword = token;
       } else {
         internalError('Unhandled modifier: $s');
       }
     }
   }
 }