Parse: Don't let BalancedDelimiterTracker consume cxx_defaultarg_end

It is not correct to let it consume the cxx_defaultarg_end token.  I'm
starting to wonder if it makes more sense to stop SkipUntil from
consuming such tokens.

llvm-svn: 225615

clang/lib/Parse/Parser.cpp

@@ -1948,7 +1948,7 @@ bool BalancedDelimiterTracker::diagnoseMissingClose() {
   // token.
   if (P.Tok.isNot(tok::r_paren) && P.Tok.isNot(tok::r_brace) &&
       P.Tok.isNot(tok::r_square) &&
-      P.SkipUntil(Close, FinalToken,
+      P.SkipUntil(Close, FinalToken, tok::cxx_defaultarg_end,
                   Parser::StopAtSemi | Parser::StopBeforeMatch) &&
       P.Tok.is(Close))
     LClose = P.ConsumeAnyToken();

clang/test/Parser/cxx0x-lambda-expressions.cpp

@@ -103,3 +103,8 @@ struct S {
   template <typename T>
   void m (T x =[0); // expected-error{{expected variable name or 'this' in lambda capture list}}
 } s;
+
+struct U {
+  template <typename T>
+  void m_fn1(T x = 0[0); // expected-error{{expected ']'}} expected-note{{to match this '['}}
+} *U;