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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___TYPE_TRAITS_IS_SCALAR_H |
| 10 | #define _LIBCPP___TYPE_TRAITS_IS_SCALAR_H |
| 11 | |
| 12 | #include <__config> |
| 13 | #include <__type_traits/integral_constant.h> |
| 14 | #include <__type_traits/is_arithmetic.h> |
| 15 | #include <__type_traits/is_enum.h> |
| 16 | #include <__type_traits/is_member_pointer.h> |
| 17 | #include <__type_traits/is_null_pointer.h> |
| 18 | #include <__type_traits/is_pointer.h> |
| 19 | |
| 20 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 21 | # pragma GCC system_header |
| 22 | #endif |
| 23 | |
| 24 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 25 | |
| 26 | #if __has_builtin(__is_scalar) |
| 27 | |
| 28 | template <class _Tp> |
| 29 | struct _LIBCPP_NO_SPECIALIZATIONS is_scalar : _BoolConstant<__is_scalar(_Tp)> {}; |
| 30 | |
| 31 | # if _LIBCPP_STD_VER >= 17 |
| 32 | template <class _Tp> |
| 33 | _LIBCPP_NO_SPECIALIZATIONS inline constexpr bool is_scalar_v = __is_scalar(_Tp); |
| 34 | # endif |
| 35 | |
| 36 | #else // __has_builtin(__is_scalar) |
| 37 | |
| 38 | template <class _Tp> |
| 39 | struct __is_block : false_type {}; |
| 40 | # if __has_extension(blocks) |
| 41 | template <class _Rp, class... _Args> |
| 42 | struct __is_block<_Rp (^)(_Args...)> : true_type {}; |
| 43 | # endif |
| 44 | |
| 45 | // clang-format off |
| 46 | template <class _Tp> |
| 47 | struct is_scalar |
| 48 | : integral_constant< |
| 49 | bool, is_arithmetic<_Tp>::value || |
| 50 | is_member_pointer<_Tp>::value || |
| 51 | is_pointer<_Tp>::value || |
| 52 | __is_null_pointer_v<_Tp> || |
| 53 | __is_block<_Tp>::value || |
| 54 | is_enum<_Tp>::value> {}; |
| 55 | // clang-format on |
| 56 | |
| 57 | template <> |
| 58 | struct is_scalar<nullptr_t> : true_type {}; |
| 59 | |
| 60 | # if _LIBCPP_STD_VER >= 17 |
| 61 | template <class _Tp> |
| 62 | inline constexpr bool is_scalar_v = is_scalar<_Tp>::value; |
| 63 | # endif |
| 64 | |
| 65 | #endif // __has_builtin(__is_scalar) |
| 66 | |
| 67 | _LIBCPP_END_NAMESPACE_STD |
| 68 | |
| 69 | #endif // _LIBCPP___TYPE_TRAITS_IS_SCALAR_H |
| 70 |
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