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//===----------------------------------------------------------------------===//
//
// 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___CXX03___ALGORITHM_RANGES_GENERATE_H
#define _LIBCPP___CXX03___ALGORITHM_RANGES_GENERATE_H
#include <__cxx03/__concepts/constructible.h>
#include <__cxx03/__concepts/invocable.h>
#include <__cxx03/__config>
#include <__cxx03/__functional/invoke.h>
#include <__cxx03/__iterator/concepts.h>
#include <__cxx03/__iterator/iterator_traits.h>
#include <__cxx03/__ranges/access.h>
#include <__cxx03/__ranges/concepts.h>
#include <__cxx03/__ranges/dangling.h>
#include <__cxx03/__utility/move.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_PUSH_MACROS
#include <__cxx03/__undef_macros>
#if _LIBCPP_STD_VER >= 20
_LIBCPP_BEGIN_NAMESPACE_STD
namespace ranges {
namespace __generate {
struct __fn {
template <class _OutIter, class _Sent, class _Func>
_LIBCPP_HIDE_FROM_ABI constexpr static _OutIter __generate_fn_impl(_OutIter __first, _Sent __last, _Func& __gen) {
for (; __first != __last; ++__first) {
*__first = __gen();
}
return __first;
}
template <input_or_output_iterator _OutIter, sentinel_for<_OutIter> _Sent, copy_constructible _Func>
requires invocable<_Func&> && indirectly_writable<_OutIter, invoke_result_t<_Func&>>
_LIBCPP_HIDE_FROM_ABI constexpr _OutIter operator()(_OutIter __first, _Sent __last, _Func __gen) const {
return __generate_fn_impl(std::move(__first), std::move(__last), __gen);
}
template <class _Range, copy_constructible _Func>
requires invocable<_Func&> && output_range<_Range, invoke_result_t<_Func&>>
_LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range> operator()(_Range&& __range, _Func __gen) const {
return __generate_fn_impl(ranges::begin(__range), ranges::end(__range), __gen);
}
};
} // namespace __generate
inline namespace __cpo {
inline constexpr auto generate = __generate::__fn{};
} // namespace __cpo
} // namespace ranges
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP_STD_VER >= 20
_LIBCPP_POP_MACROS
#endif // _LIBCPP___CXX03___ALGORITHM_RANGES_GENERATE_H
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