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freebsd
GitHub Repository: freebsd/freebsd-src
 Path: blob/main/contrib/llvm-project/libcxx/include/__fwd/variant.h
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//===---------------------------------------------------------------------===//

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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___FWD_VARIANT_H

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#define _LIBCPP___FWD_VARIANT_H

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#include <__config>

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#include <__cstddef/size_t.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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_LIBCPP_BEGIN_NAMESPACE_STD

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#if _LIBCPP_STD_VER >= 17

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template <class... _Types>

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class variant;

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template <class _Tp>

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struct variant_size;

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template <class _Tp>

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inline constexpr size_t variant_size_v = variant_size<_Tp>::value;

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template <size_t _Ip, class _Tp>

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struct variant_alternative;

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template <size_t _Ip, class _Tp>

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using variant_alternative_t = typename variant_alternative<_Ip, _Tp>::type;

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inline constexpr size_t variant_npos = static_cast<size_t>(-1);

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template <size_t _Ip, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr variant_alternative_t<_Ip, variant<_Types...>>& get(variant<_Types...>&);

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template <size_t _Ip, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr variant_alternative_t<_Ip, variant<_Types...>>&& get(variant<_Types...>&&);

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template <size_t _Ip, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr const variant_alternative_t<_Ip, variant<_Types...>>& get(const variant<_Types...>&);

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template <size_t _Ip, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr const variant_alternative_t<_Ip, variant<_Types...>>&& get(const variant<_Types...>&&);

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template <class _Tp, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr _Tp& get(variant<_Types...>&);

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template <class _Tp, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr _Tp&& get(variant<_Types...>&&);

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template <class _Tp, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr const _Tp& get(const variant<_Types...>&);

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template <class _Tp, class... _Types>

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_LIBCPP_HIDE_FROM_ABI constexpr const _Tp&& get(const variant<_Types...>&&);

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#endif // _LIBCPP_STD_VER >= 17

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_LIBCPP_END_NAMESPACE_STD

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#endif // _LIBCPP___FWD_VARIANT_H

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