Implement support for __extension__ which silences extwarnings in its
scope. This is part of the fix for PR1966
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46669 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Parse/ParseExpr.cpp b/Parse/ParseExpr.cpp
index 09f588a..67ce5f1 100644
--- a/Parse/ParseExpr.cpp
+++ b/Parse/ParseExpr.cpp
@@ -567,14 +567,24 @@
case tok::tilde: // unary-expression: '~' cast-expression
case tok::exclaim: // unary-expression: '!' cast-expression
case tok::kw___real: // unary-expression: '__real' cast-expression [GNU]
- case tok::kw___imag: // unary-expression: '__imag' cast-expression [GNU]
- case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU]
- // FIXME: Extension should silence extwarns in subexpressions.
+ case tok::kw___imag: { // unary-expression: '__imag' cast-expression [GNU]
SourceLocation SavedLoc = ConsumeToken();
Res = ParseCastExpression(false);
if (!Res.isInvalid)
Res = Actions.ActOnUnaryOp(SavedLoc, SavedKind, Res.Val);
return Res;
+ }
+
+ case tok::kw___extension__:{//unary-expression:'__extension__' cast-expr [GNU]
+ // __extension__ silences extension warnings in the subexpression.
+ bool SavedExtWarn = Diags.getWarnOnExtensions();
+ Diags.setWarnOnExtensions(false);
+ SourceLocation SavedLoc = ConsumeToken();
+ Res = ParseCastExpression(false);
+ if (!Res.isInvalid)
+ Res = Actions.ActOnUnaryOp(SavedLoc, SavedKind, Res.Val);
+ Diags.setWarnOnExtensions(SavedExtWarn);
+ return Res;
}
case tok::kw_sizeof: // unary-expression: 'sizeof' unary-expression
// unary-expression: 'sizeof' '(' type-name ')'