chromium/third_party/libc++/src/include/__tuple/find_index.h

//===----------------------------------------------------------------------===//
//
// 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___TUPLE_FIND_INDEX_H
#define _LIBCPP___TUPLE_FIND_INDEX_H

#include <__config>
#include <__type_traits/is_same.h>
#include <cstddef>

#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
#  pragma GCC system_header
#endif

#if _LIBCPP_STD_VER >= 14

_LIBCPP_BEGIN_NAMESPACE_STD

namespace __find_detail {

static constexpr size_t __not_found = …;
static constexpr size_t __ambiguous = …;

inline _LIBCPP_HIDE_FROM_ABI constexpr size_t __find_idx_return(size_t __curr_i, size_t __res, bool __matches) { … }

template <size_t _Nx>
inline _LIBCPP_HIDE_FROM_ABI constexpr size_t __find_idx(size_t __i, const bool (&__matches)[_Nx]) { … }

template <class _T1, class... _Args>
struct __find_exactly_one_checked { … };

__find_exactly_one_checked<_T1>;

} // namespace __find_detail

template <typename _T1, typename... _Args>
struct __find_exactly_one_t : public __find_detail::__find_exactly_one_checked<_T1, _Args...> { … };

_LIBCPP_END_NAMESPACE_STD

#endif // _LIBCPP_STD_VER >= 14

#endif // _LIBCPP___TUPLE_FIND_INDEX_H