091c33b1f5
The SFINAE isn't required, since the primary `tuple` class already does the SFINAE checks. This removes a bit of code that was only used for these constraints. This also moves the `tuple_element` specialization for `tuple` to `__fwd/tuple.h` to avoid a dependency on `__tuple/sfinae_helpers.h` (which should be moved in a follow-up).
58 lines
1.7 KiB
C++
58 lines
1.7 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___FWD_TUPLE_H
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#define _LIBCPP___FWD_TUPLE_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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template <size_t, class>
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struct tuple_element;
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#ifndef _LIBCPP_CXX03_LANG
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template <class...>
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class tuple;
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template <size_t _Ip, class... _Tp>
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struct tuple_element<_Ip, tuple<_Tp...> > {
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using type _LIBCPP_NODEBUG = __type_pack_element<_Ip, _Tp...>;
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};
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template <class>
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struct tuple_size;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&
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get(tuple<_Tp...>&) _NOEXCEPT;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&
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get(const tuple<_Tp...>&) _NOEXCEPT;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 typename tuple_element<_Ip, tuple<_Tp...> >::type&&
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get(tuple<_Tp...>&&) _NOEXCEPT;
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template <size_t _Ip, class... _Tp>
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_LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 const typename tuple_element<_Ip, tuple<_Tp...> >::type&&
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get(const tuple<_Tp...>&&) _NOEXCEPT;
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#endif // _LIBCPP_CXX03_LANG
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___FWD_TUPLE_H
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