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| author | Jonathan Wakely <jwakely@redhat.com> | 2022-08-31 15:00:24 +0100 |
|---|---|---|
| committer | Jonathan Wakely <jwakely@redhat.com> | 2022-09-01 20:31:00 +0100 |
| commit | cd20d9482a1f10ddf1c398c1a1d8421f97dfdefa (patch) | |
| tree | 1a83467f811f25b52b5ced57d048d650dcab2e19 /libstdc++-v3 | |
| parent | 0a4b219d39c74aec7ebf87ac3be38d8f93efd634 (diff) | |
| download | gcc-cd20d9482a1f10ddf1c398c1a1d8421f97dfdefa.tar.gz | |
libstdc++: Use built-ins for some variable templates
This avoids having to instantiate a class template that just uses the
same built-in anyway.
None of the corresponding class templates have any type-completeness
static assertions, so we're not losing any diagnostics by using the
built-ins directly.
libstdc++-v3/ChangeLog:
* include/std/type_traits (is_enum_v, is_class_v, is_union_v)
(is_empty_v, is_polymoprhic_v, is_abstract_v, is_final_v)
(is_base_of_v, is_aggregate_v): Use built-in directly instead of
instantiating class template.
Diffstat (limited to 'libstdc++-v3')
| -rw-r--r-- | libstdc++-v3/include/std/type_traits | 27 |
1 files changed, 15 insertions, 12 deletions
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 5b8314f24fd..52cca8bf3af 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -3165,11 +3165,11 @@ template <typename _Tp> inline constexpr bool is_member_function_pointer_v = is_member_function_pointer<_Tp>::value; template <typename _Tp> - inline constexpr bool is_enum_v = is_enum<_Tp>::value; + inline constexpr bool is_enum_v = __is_enum(_Tp); template <typename _Tp> - inline constexpr bool is_union_v = is_union<_Tp>::value; + inline constexpr bool is_union_v = __is_union(_Tp); template <typename _Tp> - inline constexpr bool is_class_v = is_class<_Tp>::value; + inline constexpr bool is_class_v = __is_class(_Tp); template <typename _Tp> inline constexpr bool is_function_v = is_function<_Tp>::value; template <typename _Tp> @@ -3206,14 +3206,14 @@ template <typename _Tp> _GLIBCXX17_DEPRECATED inline constexpr bool is_literal_type_v = is_literal_type<_Tp>::value; #pragma GCC diagnostic pop - template <typename _Tp> - inline constexpr bool is_empty_v = is_empty<_Tp>::value; template <typename _Tp> - inline constexpr bool is_polymorphic_v = is_polymorphic<_Tp>::value; + inline constexpr bool is_empty_v = __is_empty(_Tp); template <typename _Tp> - inline constexpr bool is_abstract_v = is_abstract<_Tp>::value; + inline constexpr bool is_polymorphic_v = __is_polymorphic(_Tp); template <typename _Tp> - inline constexpr bool is_final_v = is_final<_Tp>::value; + inline constexpr bool is_abstract_v = __is_abstract(_Tp); +template <typename _Tp> + inline constexpr bool is_final_v = __is_final(_Tp); template <typename _Tp> inline constexpr bool is_signed_v = is_signed<_Tp>::value; template <typename _Tp> @@ -3318,7 +3318,7 @@ template <typename _Tp, typename _Up> inline constexpr bool is_same_v = std::is_same<_Tp, _Up>::value; #endif template <typename _Base, typename _Derived> - inline constexpr bool is_base_of_v = is_base_of<_Base, _Derived>::value; + inline constexpr bool is_base_of_v = __is_base_of(_Base, _Derived); template <typename _From, typename _To> inline constexpr bool is_convertible_v = is_convertible<_From, _To>::value; template<typename _Fn, typename... _Args> @@ -3356,16 +3356,19 @@ template<typename _Ret, typename _Fn, typename... _Args> #ifdef _GLIBCXX_HAVE_BUILTIN_IS_AGGREGATE # define __cpp_lib_is_aggregate 201703L - /// is_aggregate + /// is_aggregate - true if the type is an aggregate. /// @since C++17 template<typename _Tp> struct is_aggregate : bool_constant<__is_aggregate(remove_cv_t<_Tp>)> { }; - /// @ingroup variable_templates + /** is_aggregate_v - true if the type is an aggregate. + * @ingroup variable_templates + * @since C++17 + */ template<typename _Tp> - inline constexpr bool is_aggregate_v = is_aggregate<_Tp>::value; + inline constexpr bool is_aggregate_v = __is_aggregate(remove_cv_t<_Tp>); #endif #endif // C++17 |