Parse 'while' and 'do-while' statements with Fasta.

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

Index: pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart b/pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart
index 68f28a049251ef0f1592fe93f6fbaae3e3ab6795..3d451f358e887cac26258b54737b2c047c6ac1c5 100644
--- a/pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart
+++ b/pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart
@@ -404,6 +404,21 @@ class AstBuilder extends ScopeListener {
   }
 
   @override
+  void endWhileStatement(Token whileKeyword, Token endToken) {
+    debugEvent("WhileStatement");
+    Statement body = pop();
+    ParenthesizedExpression condition = pop();
+    pop(); // continue target
+    pop(); // break target
+    push(ast.whileStatement(
+        toAnalyzerToken(whileKeyword),
+        condition.leftParenthesis,
+        condition.expression,
+        condition.rightParenthesis,
+        body));
+  }
+
+  @override
   void handleNoVariableInitializer(Token token) {
     debugEvent("NoVariableInitializer");
   }
@@ -958,6 +973,24 @@ class AstBuilder extends ScopeListener {
     push(ast.dottedName(components));
   }
 
+  @override
+  void endDoWhileStatement(
+      Token doKeyword, Token whileKeyword, Token semicolon) {
+    debugEvent("DoWhileStatement");
+    ParenthesizedExpression condition = pop();
+    Statement body = pop();
+    pop(); // continue target
+    pop(); // break target
+    push(ast.doStatement(
+        toAnalyzerToken(doKeyword),
+        body,
+        toAnalyzerToken(whileKeyword),
+        condition.leftParenthesis,
+        condition.expression,
+        condition.rightParenthesis,
+        toAnalyzerToken(semicolon)));
+  }
+
   void endConditionalUri(Token ifKeyword, Token equalitySign) {
     debugEvent("ConditionalUri");
     StringLiteral libraryUri = pop();