| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___TYPE_TRAITS_MAKE_SIGNED_H |
| #define _LIBCPP___TYPE_TRAITS_MAKE_SIGNED_H |
| |
| #include <__config> |
| #include <__type_traits/apply_cv.h> |
| #include <__type_traits/is_enum.h> |
| #include <__type_traits/is_integral.h> |
| #include <__type_traits/nat.h> |
| #include <__type_traits/remove_cv.h> |
| #include <__type_traits/type_list.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if __has_builtin(__make_signed) |
| |
| template <class _Tp> |
| using __make_signed_t = __make_signed(_Tp); |
| |
| #else |
| // clang-format off |
| typedef __type_list<signed char, |
| __type_list<signed short, |
| __type_list<signed int, |
| __type_list<signed long, |
| __type_list<signed long long, |
| # ifndef _LIBCPP_HAS_NO_INT128 |
| __type_list<__int128_t, |
| # endif |
| __nat |
| # ifndef _LIBCPP_HAS_NO_INT128 |
| > |
| # endif |
| > > > > > __signed_types; |
| // clang-format on |
| |
| template <class _Tp, bool = is_integral<_Tp>::value || is_enum<_Tp>::value> |
| struct __make_signed{}; |
| |
| template <class _Tp> |
| struct __make_signed<_Tp, true> { |
| typedef typename __find_first<__signed_types, sizeof(_Tp)>::type type; |
| }; |
| |
| // clang-format off |
| template <> struct __make_signed<bool, true> {}; |
| template <> struct __make_signed< signed short, true> {typedef short type;}; |
| template <> struct __make_signed<unsigned short, true> {typedef short type;}; |
| template <> struct __make_signed< signed int, true> {typedef int type;}; |
| template <> struct __make_signed<unsigned int, true> {typedef int type;}; |
| template <> struct __make_signed< signed long, true> {typedef long type;}; |
| template <> struct __make_signed<unsigned long, true> {typedef long type;}; |
| template <> struct __make_signed< signed long long, true> {typedef long long type;}; |
| template <> struct __make_signed<unsigned long long, true> {typedef long long type;}; |
| # ifndef _LIBCPP_HAS_NO_INT128 |
| template <> struct __make_signed<__int128_t, true> {typedef __int128_t type;}; |
| template <> struct __make_signed<__uint128_t, true> {typedef __int128_t type;}; |
| # endif |
| // clang-format on |
| |
| template <class _Tp> |
| using __make_signed_t = __apply_cv_t<_Tp, typename __make_signed<__remove_cv_t<_Tp> >::type>; |
| |
| #endif // __has_builtin(__make_signed) |
| |
| template <class _Tp> |
| struct make_signed { |
| using type _LIBCPP_NODEBUG = __make_signed_t<_Tp>; |
| }; |
| |
| #if _LIBCPP_STD_VER >= 14 |
| template <class _Tp> |
| using make_signed_t = __make_signed_t<_Tp>; |
| #endif |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_MAKE_SIGNED_H |