| //===----------------------------------------------------------------------===// |
| // |
| // 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_INTEGRAL_CONSTANT_H |
| #define _LIBCPP___TYPE_TRAITS_INTEGRAL_CONSTANT_H |
| |
| #include <__config> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _Tp, _Tp __v> |
| struct _LIBCPP_TEMPLATE_VIS integral_constant |
| { |
| static _LIBCPP_CONSTEXPR const _Tp value = __v; |
| typedef _Tp value_type; |
| typedef integral_constant type; |
| _LIBCPP_INLINE_VISIBILITY |
| _LIBCPP_CONSTEXPR operator value_type() const _NOEXCEPT {return value;} |
| #if _LIBCPP_STD_VER > 11 |
| _LIBCPP_INLINE_VISIBILITY |
| constexpr value_type operator ()() const _NOEXCEPT {return value;} |
| #endif |
| }; |
| |
| template <class _Tp, _Tp __v> |
| _LIBCPP_CONSTEXPR const _Tp integral_constant<_Tp, __v>::value; |
| |
| typedef integral_constant<bool, true> true_type; |
| typedef integral_constant<bool, false> false_type; |
| |
| template <bool _Val> |
| using _BoolConstant _LIBCPP_NODEBUG = integral_constant<bool, _Val>; |
| |
| #if _LIBCPP_STD_VER > 14 |
| template <bool __b> |
| using bool_constant = integral_constant<bool, __b>; |
| #endif |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_INTEGRAL_CONSTANT_H |