diff mbox series

[10/10] libstdc++: make std::is_object dispatch to new built-in traits

Message ID 20230326043032.11096-11-kmatsui@cs.washington.edu
State Superseded
Headers
Series c++, libstdc++: get std::is_object to dispatch to new built-in traits |

Commit Message

Ken Matsui March 26, 2023, 4:30 a.m. UTC 
  This patch gets std::is_object to dispatch to new built-in traits,
__is_function, __is_reference, and __is_void.

libstdc++-v3/ChangeLog:

	* include/std/type_traits (is_object): Use new built-in traits,
	__is_function, __is_reference, and __is_void.

Signed-off-by: Ken Matsui <kmatsui@cs.washington.edu>
---
 libstdc++-v3/include/std/type_traits | 9 +++++++++
 1 file changed, 9 insertions(+)
diff mbox series

Patch

diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits
index 98764685a39..5d50c55b70f 100644
--- a/libstdc++-v3/include/std/type_traits
+++ b/libstdc++-v3/include/std/type_traits
@@ -689,11 +689,20 @@  _GLIBCXX_BEGIN_NAMESPACE_VERSION
     { };
 
   /// is_object
+#if __has_builtin(__is_function) && __has_builtin(__is_reference) \
+    && __has_builtin(__is_void)
+  template<typename _Tp>
+    struct is_object
+    : public __bool_constant<!(__is_function(_Tp) || __is_reference(_Tp) ||
+                               __is_void(_Tp))>
+    { };
+#else
   template<typename _Tp>
     struct is_object
     : public __not_<__or_<is_function<_Tp>, is_reference<_Tp>,
                           is_void<_Tp>>>::type
     { };
+#endif
 
   template<typename>
     struct is_member_pointer;