cleanup to Value - fix for StringEscapesTest

frog/tree.g.dart

 // Copyright (c) 2011, 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.
 // Generated by scripts/tree_gen.py.
 
 class DirectiveDefinition extends Definition {
   Identifier name;
   List<ArgumentNode> arguments;
 
   DirectiveDefinition(this.name, this.arguments, SourceSpan span): super(span) {}
@@ skipping 342 matching lines @@
   visit(TreeVisitor visitor) => visitor.visitThisExpression(this);
 }
 
 class SuperExpression extends Expression {
 
   SuperExpression(SourceSpan span): super(span) {}
 
   visit(TreeVisitor visitor) => visitor.visitSuperExpression(this);
 }
 
-class NullExpression extends Expression {
+class LiteralExpression extends Expression {
+  Value value;
 
-  NullExpression(SourceSpan span): super(span) {}
-
-  visit(TreeVisitor visitor) => visitor.visitNullExpression(this);
-}
-
-class LiteralExpression extends Expression {
-  var value;
-  TypeReference type;
-  String text;
-
-  LiteralExpression(this.value, this.type, this.text, SourceSpan span): super(span) {}
+  LiteralExpression(this.value, SourceSpan span): super(span) {}
 
   visit(TreeVisitor visitor) => visitor.visitLiteralExpression(this);
 }
 
+class StringInterpExpression extends Expression {
+  List<Expression> pieces;
+
+  StringInterpExpression(this.pieces, SourceSpan span): super(span) {}
+
+  visit(TreeVisitor visitor) => visitor.visitStringInterpExpression(this);
+}
+
 class NameTypeReference extends TypeReference {
   bool isFinal;
   Identifier name;
   List<Identifier> names;
 
   NameTypeReference(this.isFinal, this.name, this.names, SourceSpan span): super(span) {}
 
   visit(TreeVisitor visitor) => visitor.visitNameTypeReference(this);
 }
 
@@ skipping 166 matching lines @@
   visitAwaitExpression(AwaitExpression node);
 
   visitDotExpression(DotExpression node);
 
   visitVarExpression(VarExpression node);
 
   visitThisExpression(ThisExpression node);
 
   visitSuperExpression(SuperExpression node);
 
-  visitNullExpression(NullExpression node);
+  visitLiteralExpression(LiteralExpression node);
 
-  visitLiteralExpression(LiteralExpression node);
+  visitStringInterpExpression(StringInterpExpression node);
 
   visitNameTypeReference(NameTypeReference node);
 
   visitGenericTypeReference(GenericTypeReference node);
 
   visitFunctionTypeReference(FunctionTypeReference node);
 
   visitDefaultTypeReference(DefaultTypeReference node);
 
   visitArgumentNode(ArgumentNode node);
@@ skipping 247 matching lines @@
   }
 
   void visitThisExpression(ThisExpression node) {
     output.heading('ThisExpression', node.span);
   }
 
   void visitSuperExpression(SuperExpression node) {
     output.heading('SuperExpression', node.span);
   }
 
-  void visitNullExpression(NullExpression node) {
-    output.heading('NullExpression', node.span);
+  void visitLiteralExpression(LiteralExpression node) {
+    output.heading('LiteralExpression(' + output.toValue(node.value) + ")", node.span);
   }
 
-  void visitLiteralExpression(LiteralExpression node) {
-    output.heading('LiteralExpression', node.span);
-    output.writeValue('value', node.value);
-    output.writeNode('type', node.type);
-    output.writeValue('text', node.text);
+  void visitStringInterpExpression(StringInterpExpression node) {
+    output.heading('StringInterpExpression', node.span);
+    output.writeNodeList('pieces', node.pieces);
   }
 
   void visitNameTypeReference(NameTypeReference node) {
     output.heading('NameTypeReference', node.span);
     output.writeValue('isFinal', node.isFinal);
     output.writeNode('name', node.name);
     output.writeNodeList('names', node.names);
   }
 
   void visitGenericTypeReference(GenericTypeReference node) {
@@ skipping 59 matching lines @@
     output.heading('DeclaredIdentifier', node.span);
     output.writeNode('type', node.type);
     output.writeNode('name', node.name);
   }
 
   void visitTypeReference(TypeReference node) {
     output.heading('TypeReference(' + output.toValue(node.type) + ")", node.span);
   }
 
 }