Properly diagnose using abstract and incomplete types in va_arg

- Move a test from test/SemaTemplate/instantiate-expr-3.cpp, it did not belong there
- Incomplete and abstract types are considered hard errors

llvm-svn: 132979

1 files changed, 18 insertions, 0 deletions

diff --git a/clang/test/SemaCXX/vararg-non-pod.cpp b/clang/test/SemaCXX/vararg-non-pod.cpp
index df0080fac94..3ca07b0215c 100644
--- a/clang/test/SemaCXX/vararg-non-pod.cpp
+++ b/clang/test/SemaCXX/vararg-non-pod.cpp
@@ -101,3 +101,21 @@ void t6(Foo somearg, ... ) {
   __builtin_va_start(list, somearg);
 }
 
+void t7(int n, ...) {
+  __builtin_va_list list;
+  __builtin_va_start(list, n);
+  (void)__builtin_va_arg(list, C); // expected-warning{{second argument to 'va_arg' is of non-POD type 'C'}}
+  __builtin_va_end(list);
+}
+
+struct Abstract {
+  virtual void doit() = 0; // expected-note{{unimplemented pure virtual method}}
+};
+
+void t8(int n, ...) {
+  __builtin_va_list list;
+  __builtin_va_start(list, n);
+  (void)__builtin_va_arg(list, Abstract); // expected-error{{second argument to 'va_arg' is of abstract type 'Abstract'}}
+  __builtin_va_end(list);
+}
+