71 lines
2.1 KiB
C++
71 lines
2.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___TUPLE_APPLY_CV_H
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#define _LIBCPP___TUPLE_APPLY_CV_H
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#include <__config>
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#include <__type_traits/is_const.h>
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#include <__type_traits/is_reference.h>
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#include <__type_traits/is_volatile.h>
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#include <__type_traits/remove_reference.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#ifndef _LIBCPP_CXX03_LANG
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_LIBCPP_BEGIN_NAMESPACE_STD
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template <bool _ApplyLV, bool _ApplyConst, bool _ApplyVolatile>
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struct __apply_cv_mf;
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template <>
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struct __apply_cv_mf<false, false, false> {
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template <class _Tp> using __apply = _Tp;
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};
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template <>
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struct __apply_cv_mf<false, true, false> {
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template <class _Tp> using __apply _LIBCPP_NODEBUG = const _Tp;
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};
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template <>
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struct __apply_cv_mf<false, false, true> {
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template <class _Tp> using __apply _LIBCPP_NODEBUG = volatile _Tp;
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};
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template <>
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struct __apply_cv_mf<false, true, true> {
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template <class _Tp> using __apply _LIBCPP_NODEBUG = const volatile _Tp;
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};
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template <>
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struct __apply_cv_mf<true, false, false> {
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template <class _Tp> using __apply _LIBCPP_NODEBUG = _Tp&;
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};
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template <>
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struct __apply_cv_mf<true, true, false> {
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template <class _Tp> using __apply _LIBCPP_NODEBUG = const _Tp&;
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};
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template <>
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struct __apply_cv_mf<true, false, true> {
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template <class _Tp> using __apply _LIBCPP_NODEBUG = volatile _Tp&;
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};
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template <>
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struct __apply_cv_mf<true, true, true> {
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template <class _Tp> using __apply _LIBCPP_NODEBUG = const volatile _Tp&;
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};
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template <class _Tp, class _RawTp = __libcpp_remove_reference_t<_Tp> >
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using __apply_cv_t _LIBCPP_NODEBUG = __apply_cv_mf<
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is_lvalue_reference<_Tp>::value,
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is_const<_RawTp>::value,
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is_volatile<_RawTp>::value>;
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_CXX03_LANG
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#endif // _LIBCPP___TUPLE_APPLY_CV_H
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