Parse #operator symbol literals 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 c2d1c6742c9aa89c7e2b5ab1612623a405e18338..8eda5e59bbc29abcd5398edbc659b47ca61eace5 100644
--- a/pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart
+++ b/pkg/front_end/lib/src/fasta/analyzer/ast_builder.dart
@@ -149,8 +149,14 @@ class AstBuilder extends ScopeListener {
 
   void handleIdentifier(Token token, IdentifierContext context) {
     debugEvent("handleIdentifier");
-    String name = token.value;
-    SimpleIdentifier identifier = ast.simpleIdentifier(toAnalyzerToken(token));
+    analyzer.Token analyzerToken = toAnalyzerToken(token);
+
+    if (context.inSymbol) {
+      push(analyzerToken);
+      return;
+    }
+
+    SimpleIdentifier identifier = ast.simpleIdentifier(analyzerToken);
     if (context.inLibraryOrPartOfDeclaration) {
       if (!context.isContinuation) {
         push([identifier]);
@@ -166,6 +172,7 @@ class AstBuilder extends ScopeListener {
       push(ast.enumConstantDeclaration(comment, metadata, identifier));
     } else {
       if (context.isScopeReference) {
+        String name = token.value;
         Builder builder = scope.lookup(name, token.charOffset, uri);
         if (builder != null) {
           Element element = elementStore[builder];
@@ -263,6 +270,11 @@ class AstBuilder extends ScopeListener {
     push(receiver);
   }
 
+  void handleOperator(Token token) {
+    debugEvent("Operator");
+    push(toAnalyzerToken(token));
+  }
+
   void handleBinaryExpression(Token token) {
     debugEvent("BinaryExpression");
     if (identical(".", token.stringValue) ||
@@ -487,13 +499,9 @@ class AstBuilder extends ScopeListener {
     push(ast.mapLiteralEntry(key, toAnalyzerToken(colon), value));
   }
 
-  void endLiteralSymbol(Token hashToken, int identifierCount) {
+  void endLiteralSymbol(Token hashToken, int tokenCount) {
     debugEvent("LiteralSymbol");
-    List<analyzer.Token> components = new List<analyzer.Token>(identifierCount);
-    for (int i = identifierCount - 1; i >= 0; i--) {
-      SimpleIdentifier identifier = pop();
-      components[i] = identifier.token;
-    }
+    List<analyzer.Token> components = popList(tokenCount);
     push(ast.symbolLiteral(toAnalyzerToken(hashToken), components));
   }