Redo "Add more MiniJsParser functionality."

sdk/lib/_internal/compiler/implementation/js/nodes.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.
 
 part of js;
 
 abstract class NodeVisitor<T> {
   T visitProgram(Program node);
 
   T visitBlock(Block node);
@@ skipping 46 matching lines @@
 
   T visitArrayInitializer(ArrayInitializer node);
   T visitArrayElement(ArrayElement node);
   T visitObjectInitializer(ObjectInitializer node);
   T visitProperty(Property node);
   T visitRegExpLiteral(RegExpLiteral node);
 
   T visitComment(Comment node);
 
   T visitInterpolatedExpression(InterpolatedExpression node);
+  T visitInterpolatedStatement(InterpolatedStatement node);
   T visitJSExpression(JSExpression node);
 }
 
 class BaseVisitor<T> implements NodeVisitor<T> {
   T visitNode(Node node) {
     node.visitChildren(this);
     return null;
   }
 
   T visitProgram(Program node) => visitNode(node);
@@ skipping 67 matching lines @@
   T visitLiteralNull(LiteralNull node) => visitLiteral(node);
 
   T visitArrayInitializer(ArrayInitializer node) => visitExpression(node);
   T visitArrayElement(ArrayElement node) => visitNode(node);
   T visitObjectInitializer(ObjectInitializer node) => visitExpression(node);
   T visitProperty(Property node) => visitNode(node);
   T visitRegExpLiteral(RegExpLiteral node) => visitExpression(node);
 
   T visitInterpolatedExpression(InterpolatedExpression node)
       => visitExpression(node);
+  T visitInterpolatedStatement(InterpolatedStatement node)
+      => visitStatement(node);
   T visitJSExpression(JSExpression node) => visitExpression(node);
 
   // Ignore comments by default.
   T visitComment(Comment node) => null;
 }
 
 abstract class Node {
   var sourcePosition;
   var endSourcePosition;
 
@@ skipping 778 matching lines @@
   Property(this.name, this.value);
 
   accept(NodeVisitor visitor) => visitor.visitProperty(this);
 
   void visitChildren(NodeVisitor visitor) {
     name.accept(visitor);
     value.accept(visitor);
   }
 }
 
-class InterpolatedExpression extends Expression {
+/// Tag class for all interpolated positions.
+abstract class InterpolatedNode implements Node {}
+
+class InterpolatedExpression extends Expression implements InterpolatedNode {
   Expression value;
 
   InterpolatedExpression(this.value);
 
+  void assign(Expression newValue) {
+    value = newValue;
+  }
+
   accept(NodeVisitor visitor) => visitor.visitInterpolatedExpression(this);
 
   void visitChildren(NodeVisitor visitor) {
     if (value != null) value.accept(visitor);
   }
 
   int get precedenceLevel => value.precedenceLevel;
 }
 
+class InterpolatedStatement extends Statement implements InterpolatedNode {
+  Statement value;
+
+  InterpolatedStatement(this.value);
+
+  void assign(Node newValue) {
+    if (newValue is Expression)
+      value = new ExpressionStatement(newValue);
+    else
+      value = newValue;
+  }
+
+  accept(NodeVisitor visitor) => visitor.visitInterpolatedStatement(this);
+
+  void visitChildren(NodeVisitor visitor) {
+    if (value != null) value.accept(visitor);
+  }
+}
+
 class JSExpression extends Expression {
   Expression value;
-  List<InterpolatedExpression> interpolatedExpressions;
+  List<InterpolatedNode> interpolatedNodes;
 
-  JSExpression(this.value, this.interpolatedExpressions);
+  JSExpression(this.value, this.interpolatedNodes);
 
   accept(NodeVisitor visitor) => visitor.visitJSExpression(this);
 
   void visitChildren(NodeVisitor visitor) {
     value.accept(visitor);
-    for (InterpolatedExpression expression in interpolatedExpressions) {
-      expression.accept(visitor);
+    for (InterpolatedNode node in interpolatedNodes) {
+      node.accept(visitor);
     }
   }
 
   int get precedenceLevel => value.precedenceLevel;
 }
 
+// TODO(sra): JSStatement like JSExpression.
+
 /**
  * [RegExpLiteral]s, despite being called "Literal", do not inherit from
  * [Literal]. Indeed, regular expressions in JavaScript have a side-effect and
  * are thus not in the same category as numbers or strings.
  */
 class RegExpLiteral extends Expression {
   /** Contains the pattern and the flags.*/
   String pattern;
 
   RegExpLiteral(this.pattern);
@@ skipping 12 matching lines @@
  */
 class Comment extends Statement {
   final String comment;
 
   Comment(this.comment);
 
   accept(NodeVisitor visitor) => visitor.visitComment(this);
 
   void visitChildren(NodeVisitor visitor) {}
 }