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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_INTEGER_TRAITS_H |
| 10 | #define _LIBCPP___TYPE_TRAITS_INTEGER_TRAITS_H |
| 11 | |
| 12 | #include <__config> |
| 13 | |
| 14 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 15 | # pragma GCC system_header |
| 16 | #endif |
| 17 | |
| 18 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 19 | |
| 20 | // This trait is to determine whether a type is a /signed integer type/ |
| 21 | // See [basic.fundamental]/p1 |
| 22 | template <class _Tp> |
| 23 | inline const bool __is_signed_integer_v = false; |
| 24 | template <> |
| 25 | inline const bool __is_signed_integer_v<signed char> = true; |
| 26 | template <> |
| 27 | inline const bool __is_signed_integer_v<signed short> = true; |
| 28 | template <> |
| 29 | inline const bool __is_signed_integer_v<signed int> = true; |
| 30 | template <> |
| 31 | inline const bool __is_signed_integer_v<signed long> = true; |
| 32 | template <> |
| 33 | inline const bool __is_signed_integer_v<signed long long> = true; |
| 34 | #if _LIBCPP_HAS_INT128 |
| 35 | template <> |
| 36 | inline const bool __is_signed_integer_v<__int128_t> = true; |
| 37 | #endif |
| 38 | |
| 39 | // This trait is to determine whether a type is an /unsigned integer type/ |
| 40 | // See [basic.fundamental]/p2 |
| 41 | template <class _Tp> |
| 42 | inline const bool __is_unsigned_integer_v = false; |
| 43 | template <> |
| 44 | inline const bool __is_unsigned_integer_v<unsigned char> = true; |
| 45 | template <> |
| 46 | inline const bool __is_unsigned_integer_v<unsigned short> = true; |
| 47 | template <> |
| 48 | inline const bool __is_unsigned_integer_v<unsigned int> = true; |
| 49 | template <> |
| 50 | inline const bool __is_unsigned_integer_v<unsigned long> = true; |
| 51 | template <> |
| 52 | inline const bool __is_unsigned_integer_v<unsigned long long> = true; |
| 53 | #if _LIBCPP_HAS_INT128 |
| 54 | template <> |
| 55 | inline const bool __is_unsigned_integer_v<__uint128_t> = true; |
| 56 | #endif |
| 57 | |
| 58 | #if _LIBCPP_STD_VER >= 20 |
| 59 | template <class _Tp> |
| 60 | concept __signed_integer = __is_signed_integer_v<_Tp>; |
| 61 | |
| 62 | template <class _Tp> |
| 63 | concept __unsigned_integer = __is_unsigned_integer_v<_Tp>; |
| 64 | |
| 65 | // This isn't called __integer, because an integer type according to [basic.fundamental]/p11 is the same as an integral |
| 66 | // type. An integral type is _not_ the same set of types as signed and unsigned integer types combined. |
| 67 | template <class _Tp> |
| 68 | concept __signed_or_unsigned_integer = __signed_integer<_Tp> || __unsigned_integer<_Tp>; |
| 69 | #endif |
| 70 | |
| 71 | _LIBCPP_END_NAMESPACE_STD |
| 72 | |
| 73 | #endif // _LIBCPP___TYPE_TRAITS_INTEGER_TRAITS_H |
| 74 |
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