Implement the GNU __null extension
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@60235 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 7a8119c..3c021c2 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -1031,8 +1031,11 @@
= dyn_cast<CXXDefaultArgExpr>(this)) {
// See through default argument expressions
return DefaultArg->getExpr()->isNullPointerConstant(Ctx);
+ } else if (isa<GNUNullExpr>(this)) {
+ // The GNU __null extension is always a null pointer constant.
+ return true;
}
-
+
// This expression must be an integer type.
if (!getType()->isIntegerType())
return false;
@@ -1383,6 +1386,10 @@
Stmt::child_iterator ChooseExpr::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator ChooseExpr::child_end() { return &SubExprs[0]+END_EXPR; }
+// GNUNullExpr
+Stmt::child_iterator GNUNullExpr::child_begin() { return child_iterator(); }
+Stmt::child_iterator GNUNullExpr::child_end() { return child_iterator(); }
+
// OverloadExpr
Stmt::child_iterator OverloadExpr::child_begin() { return &SubExprs[0]; }
Stmt::child_iterator OverloadExpr::child_end() { return &SubExprs[0]+NumExprs; }