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From: Ken Matsui <kmatsui@gcc.gnu.org> To: gcc-cvs@gcc.gnu.org, libstdc++-cvs@gcc.gnu.org Subject: [gcc(refs/users/kmatsui/heads/is_object)] libstdc++: make std::is_object dispatch to new built-in traits Date: Sat, 8 Jul 2023 05:07:46 +0000 (GMT) [thread overview] Message-ID: <20230708050746.05F6D3858035@sourceware.org> (raw) https://gcc.gnu.org/g:6cba4940fc5765c91ff67e7c74df7384a5e0b4e7 commit 6cba4940fc5765c91ff67e7c74df7384a5e0b4e7 Author: Ken Matsui <kmatsui@gcc.gnu.org> Date: Thu Mar 30 02:13:49 2023 -0700 libstdc++: make std::is_object dispatch to new built-in traits 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. (is_object_v): Likewise. Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> Diff: --- libstdc++-v3/include/std/type_traits | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 780fcc00135..715310f10bf 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -682,11 +682,20 @@ _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; @@ -3235,8 +3244,17 @@ template <typename _Tp> inline constexpr bool is_arithmetic_v = is_arithmetic<_Tp>::value; template <typename _Tp> inline constexpr bool is_fundamental_v = is_fundamental<_Tp>::value; + +#if __has_builtin(__is_function) && __has_builtin(__is_reference) \ + && __has_builtin(__is_void) +template <typename _Tp> + inline constexpr bool is_object_v + = !(__is_function(_Tp) || __is_reference(_Tp) || __is_void(_Tp)); +#else template <typename _Tp> inline constexpr bool is_object_v = is_object<_Tp>::value; +#endif + template <typename _Tp> inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; template <typename _Tp>
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