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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___ALGORITHM_PSTL_GENERATE_H
#define _LIBCPP___ALGORITHM_PSTL_GENERATE_H
#include <__algorithm/pstl_backend.h>
#include <__algorithm/pstl_for_each.h>
#include <__algorithm/pstl_frontend_dispatch.h>
#include <__config>
#include <__iterator/cpp17_iterator_concepts.h>
#include <__iterator/iterator_traits.h>
#include <__type_traits/enable_if.h>
#include <__type_traits/is_execution_policy.h>
#include <__type_traits/remove_cvref.h>
#include <__utility/move.h>
#include <optional>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
_LIBCPP_BEGIN_NAMESPACE_STD
template <class>
void __pstl_generate();
template <class _ExecutionPolicy,
class _ForwardIterator,
class _Generator,
class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
__generate(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _ForwardIterator&& __last, _Generator&& __gen) {
_LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
return std::__pstl_frontend_dispatch(
_LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_generate, _RawPolicy),
[&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _Generator __g_gen) {
return std::__for_each(
__policy, std::move(__g_first), std::move(__g_last), [&](__iter_reference<_ForwardIterator> __element) {
__element = __g_gen();
});
},
std::move(__first),
std::move(__last),
std::move(__gen));
}
template <class _ExecutionPolicy,
class _ForwardIterator,
class _Generator,
class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
_LIBCPP_HIDE_FROM_ABI void
generate(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _Generator __gen) {
_LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
if (!std::__generate(__policy, std::move(__first), std::move(__last), std::move(__gen)))
std::__throw_bad_alloc();
}
template <class>
void __pstl_generate_n();
template <class _ExecutionPolicy,
class _ForwardIterator,
class _Size,
class _Generator,
class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<__empty>
__generate_n(_ExecutionPolicy&& __policy, _ForwardIterator&& __first, _Size&& __n, _Generator&& __gen) {
return std::__pstl_frontend_dispatch(
_LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_generate_n, _RawPolicy),
[&__policy](_ForwardIterator __g_first, _Size __g_n, _Generator __g_gen) {
return std::__for_each_n(
__policy, std::move(__g_first), std::move(__g_n), [&](__iter_reference<_ForwardIterator> __element) {
__element = __g_gen();
});
},
std::move(__first),
__n,
std::move(__gen));
}
template <class _ExecutionPolicy,
class _ForwardIterator,
class _Size,
class _Generator,
class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
_LIBCPP_HIDE_FROM_ABI void
generate_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _Generator __gen) {
_LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator);
if (!std::__generate_n(__policy, std::move(__first), std::move(__n), std::move(__gen)))
std::__throw_bad_alloc();
}
_LIBCPP_END_NAMESPACE_STD
#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
#endif // _LIBCPP___ALGORITHM_PSTL_GENERATE_H
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