| Message ID | 20230709084717.20744-2-kmatsui@gcc.gnu.org |
|---|---|
| State | New |
| Headers | show |
| Series | [1/2] c++, libstdc++: implement __is_signed built-in trait | expand |
On Sun, 9 Jul 2023 at 09:50, Ken Matsui via Libstdc++ <libstdc++@gcc.gnu.org> wrote: > > This patch lets libstdc++ use new built-in trait __is_signed. > > libstdc++-v3/ChangeLog: > > * include/std/type_traits (is_signed): Use __is_signed built-in trait. > (is_signed_v): Likewise. > > Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> OK for trunk after the front-end implementation of __is_signed is committed. > --- > libstdc++-v3/include/std/type_traits | 15 ++++++++++++++- > 1 file changed, 14 insertions(+), 1 deletion(-) > > diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits > index 0e7a9c9c7f3..23ab5a4b1e5 100644 > --- a/libstdc++-v3/include/std/type_traits > +++ b/libstdc++-v3/include/std/type_traits > @@ -865,6 +865,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION > : public __bool_constant<__is_abstract(_Tp)> > { }; > > + /// is_signed > +#if __has_builtin(__is_signed) > + template<typename _Tp> > + struct is_signed > + : public __bool_constant<__is_signed(_Tp)> > + { }; > +#else > /// @cond undocumented > template<typename _Tp, > bool = is_arithmetic<_Tp>::value> > @@ -877,11 +884,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION > { }; > /// @endcond > > - /// is_signed > template<typename _Tp> > struct is_signed > : public __is_signed_helper<_Tp>::type > { }; > +#endif > > /// is_unsigned > template<typename _Tp> > @@ -3240,8 +3247,14 @@ template <typename _Tp> > template <typename _Tp> > inline constexpr bool is_final_v = __is_final(_Tp); > > +#if __has_builtin(__is_signed) > +template <typename _Tp> > + inline constexpr bool is_signed_v = __is_signed(_Tp); > +#else > template <typename _Tp> > inline constexpr bool is_signed_v = is_signed<_Tp>::value; > +#endif > + > template <typename _Tp> > inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value; > > -- > 2.41.0 >
diff --git a/libstdc++-v3/include/std/type_traits b/libstdc++-v3/include/std/type_traits index 0e7a9c9c7f3..23ab5a4b1e5 100644 --- a/libstdc++-v3/include/std/type_traits +++ b/libstdc++-v3/include/std/type_traits @@ -865,6 +865,13 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION : public __bool_constant<__is_abstract(_Tp)> { }; + /// is_signed +#if __has_builtin(__is_signed) + template<typename _Tp> + struct is_signed + : public __bool_constant<__is_signed(_Tp)> + { }; +#else /// @cond undocumented template<typename _Tp, bool = is_arithmetic<_Tp>::value> @@ -877,11 +884,11 @@ _GLIBCXX_BEGIN_NAMESPACE_VERSION { }; /// @endcond - /// is_signed template<typename _Tp> struct is_signed : public __is_signed_helper<_Tp>::type { }; +#endif /// is_unsigned template<typename _Tp> @@ -3240,8 +3247,14 @@ template <typename _Tp> template <typename _Tp> inline constexpr bool is_final_v = __is_final(_Tp); +#if __has_builtin(__is_signed) +template <typename _Tp> + inline constexpr bool is_signed_v = __is_signed(_Tp); +#else template <typename _Tp> inline constexpr bool is_signed_v = is_signed<_Tp>::value; +#endif + template <typename _Tp> inline constexpr bool is_unsigned_v = is_unsigned<_Tp>::value;
This patch lets libstdc++ use new built-in trait __is_signed. libstdc++-v3/ChangeLog: * include/std/type_traits (is_signed): Use __is_signed built-in trait. (is_signed_v): Likewise. Signed-off-by: Ken Matsui <kmatsui@gcc.gnu.org> --- libstdc++-v3/include/std/type_traits | 15 ++++++++++++++- 1 file changed, 14 insertions(+), 1 deletion(-)