Fixup __extension__ i = 1 parsing. Thanks Eli!

llvm-svn: 71927

clang/lib/Parse/ParseExpr.cpp

@@ -225,7 +225,7 @@ Parser::ParseExpressionWithLeadingAt(SourceLocation AtLoc) {
 /// process of disambiguating between an expression and a declaration.
 Parser::OwningExprResult
 Parser::ParseExpressionWithLeadingExtension(SourceLocation ExtLoc) {
-  OwningExprResult LHS(ParseAssignmentExpression());
+  OwningExprResult LHS(ParseCastExpression(false));
   if (LHS.isInvalid()) return move(LHS);
 
   LHS = Actions.ActOnUnaryOp(CurScope, ExtLoc, tok::kw___extension__,

clang/test/Parser/cxx-throw.cpp

@@ -10,7 +10,6 @@ void foo() {
   throw 1;
   throw;
   1 ? throw : (void)42;
-  // gcc doesn't parse the below, but we do
-  __extension__ throw 1;
+  __extension__ throw 1;    // expected-error {{expected expression}}
   (void)throw;              // expected-error {{expected expression}}
 }