Prefix string literal must be identifier

compiler/java/com/google/dart/compiler/parser/DartParser.java

Index: compiler/java/com/google/dart/compiler/parser/DartParser.java
diff --git a/compiler/java/com/google/dart/compiler/parser/DartParser.java b/compiler/java/com/google/dart/compiler/parser/DartParser.java
index 9b42acb205fb4d9c924235cae9499006a872964b..4b45d4a19c2ec0c8c88af86c91dcdc41b9358e6f 100644
--- a/compiler/java/com/google/dart/compiler/parser/DartParser.java
+++ b/compiler/java/com/google/dart/compiler/parser/DartParser.java
@@ -376,6 +376,11 @@ public class DartParser extends CompletionHooksParserBase {
       expect(Token.COLON);
       beginLiteral();
       expect(Token.STRING);
+      String id = ctx.getTokenString();
+      // The specification requires the value of this string be a valid identifier
+      if(id == null || !id.matches("[_a-zA-Z]([_A-Za-z0-9]*)")) {

[codefu, 2011/11/02 16:04:59]

Looking further at the spec and searching for just "$", it appears identifiers
cannot have the $ in them if they are in a string; hence this simplification.

+        reportError(position(), ParserErrorCode.EXPECTED_PREFIX_IDENTIFIER);
+      }
       prefix = done(DartStringLiteral.get(ctx.getTokenString()));
     }
     expectCloseParen();