Implement the GNU __null extension

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60235 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 4 insertions, 0 deletions

diff --git a/lib/Parse/ParseExpr.cpp b/lib/Parse/ParseExpr.cpp
index 66b1d18078..df46612b57 100644
--- a/lib/Parse/ParseExpr.cpp
+++ b/lib/Parse/ParseExpr.cpp
@@ -378,6 +378,7 @@ Parser::ParseRHSOfBinaryExpression(ExprResult LHS, unsigned MinPrec) {
 /// [GNU]   '__builtin_choose_expr' '(' assign-expr ',' assign-expr ','
 ///                                     assign-expr ')'
 /// [GNU]   '__builtin_types_compatible_p' '(' type-name ',' type-name ')'
+/// [GNU]   '__null'
 /// [OBJC]  '[' objc-message-expr ']'    
 /// [OBJC]  '@selector' '(' objc-selector-arg ')'
 /// [OBJC]  '@protocol' '(' identifier ')'             
@@ -531,6 +532,9 @@ Parser::ExprResult Parser::ParseCastExpression(bool isUnaryExpression) {
   case tok::kw___builtin_overload:
   case tok::kw___builtin_types_compatible_p:
     return ParseBuiltinPrimaryExpression();
+  case tok::kw___null:
+    return Actions.ActOnGNUNullExpr(ConsumeToken());
+    break;
   case tok::plusplus:      // unary-expression: '++' unary-expression
   case tok::minusminus: {  // unary-expression: '--' unary-expression
     SourceLocation SavedLoc = ConsumeToken();