Support symbol literals.

sdk/lib/_internal/compiler/implementation/scanner/listener.dart

Index: sdk/lib/_internal/compiler/implementation/scanner/listener.dart
diff --git a/sdk/lib/_internal/compiler/implementation/scanner/listener.dart b/sdk/lib/_internal/compiler/implementation/scanner/listener.dart
index 65f35e28cbcdfe26365afb3c1c1150dc2c988d96..5ee7a0e99fcefaf2070da1436275f8593afe0175 100644
--- a/sdk/lib/_internal/compiler/implementation/scanner/listener.dart
+++ b/sdk/lib/_internal/compiler/implementation/scanner/listener.dart
@@ -310,6 +310,13 @@ class Listener {
 
   void endSwitchBlock(int caseCount, Token beginToken, Token endToken) {
   }
+  
+  void beginSymbolLiteral(Token token) {
+  }
+  
+  void endSymbolLiteral(Token hashToken, Token operatorToken, 
+                        int identifierCount) {
+  }
 
   void beginThrowExpression(Token token) {
   }
@@ -1326,6 +1333,19 @@ class NodeListener extends ElementListener {
   void handleLiteralNull(Token token) {
     pushNode(new LiteralNull(token));
   }
+  
+  void endSymbolLiteral(Token hashToken, Token operatorToken, 
+                        int identifierCount) {
+    Operator operator = null;
+    if (operatorToken != null) {
+      operator = new Operator(operatorToken);
+    }
+    NodeList identifiers = null;
+    if (identifierCount > 0) {

[ahe, 2013/08/06 12:20:55]

How can identifier count be zero? Is that an error?

[Johnni Winther, 2013/09/03 12:27:50]

It meant operatorToken was != null. Both are now in the identifiers list.

+      identifiers = makeNodeList(identifierCount, null, null, '.');
+    }
+    pushNode(new SymbolLiteral(hashToken, operator, identifiers));
+  }
 
   void handleBinaryExpression(Token token) {
     Node argument = popNode();