Repeated prefixes and parser fixes.

dart/frog/leg/scanner/partial_parser.dart

Index: dart/frog/leg/scanner/partial_parser.dart
diff --git a/dart/frog/leg/scanner/partial_parser.dart b/dart/frog/leg/scanner/partial_parser.dart
index fa6ea9a8d30782862c8986155cb6aecdc5f56bb7..cc09ff6c90df5871a620e36a3a37f1e9b8c00279 100644
--- a/dart/frog/leg/scanner/partial_parser.dart
+++ b/dart/frog/leg/scanner/partial_parser.dart
@@ -20,6 +20,12 @@ class PartialParser extends Parser {
           (value === ',') ||
           (value === ']'))
         return token;
+      if (value === '=' && token.next.stringValue === '{') {

[ahe, 2012/03/10 23:07:18]

I should add a comment explaining this covers this case:

class Foo {
  var map;
  Foo() : map = {};
}

[ahe, 2012/03/11 13:01:50]

Done.

+        BeginGroupToken begin = token.next;
+        token = (begin.endGroup !== null) ? begin.endGroup : token;
+        token = token.next;
+        continue;
+      }
       if (!mayParseFunctionExpressions && value === '{')
         return token;
       if ((value !== '<') && (token is BeginGroupToken)) {