1// -*- C++ -*-
2//===----------------------------------------------------------------------===//
3//
4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5// See https://llvm.org/LICENSE.txt for license information.
6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7//
8//===----------------------------------------------------------------------===//
9
10#ifndef _LIBCPP___TUPLE_TUPLE_TRANSFORM_H
11#define _LIBCPP___TUPLE_TUPLE_TRANSFORM_H
12
13#include <__config>
14
15#include <__functional/invoke.h>
16#include <__utility/forward.h>
17#include <tuple>
18
19#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
20# pragma GCC system_header
21#endif
22
23_LIBCPP_PUSH_MACROS
24#include <__undef_macros>
25
26_LIBCPP_BEGIN_NAMESPACE_STD
27
28#if _LIBCPP_STD_VER >= 23
29
30template <class _Fun, class _Tuple>
31_LIBCPP_HIDE_FROM_ABI constexpr auto __tuple_transform(_Fun&& __f, _Tuple&& __tuple) {
32 return std::apply(
33 [&]<class... _Types>(_Types&&... __elements) {
34 return tuple<invoke_result_t<_Fun&, _Types>...>(std::invoke(__f, std::forward<_Types>(__elements))...);
35 },
36 std::forward<_Tuple>(__tuple));
37}
38
39#endif // _LIBCPP_STD_VER >= 23
40
41_LIBCPP_END_NAMESPACE_STD
42
43_LIBCPP_POP_MACROS
44
45#endif // _LIBCPP___TUPLE_TUPLE_TRANSFORM_H
46