02540b2f6d
Before this patch, we would fail to implicitly convert the result of predicates to bool, which means we'd potentially perform a copy or move construction of the boolean-testable, which isn't allowed. The same holds true for comparing iterators against sentinels, which is allowed to return a boolean-testable type. We already had tests aiming to ensure correct handling of these types, but they failed to provide appropriate coverage in several cases due to guaranteed RVO. This patch fixes the tests, adds tests for missing algorithms and views, and fixes the actual problems in the code. Fixes #69074
324 lines
13 KiB
C++
324 lines
13 KiB
C++
// -*- C++ -*-
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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___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H
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#define _LIBCPP___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H
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#include <__algorithm/in_out_result.h>
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#include <__concepts/constructible.h>
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#include <__config>
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#include <__iterator/concepts.h>
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#include <__iterator/incrementable_traits.h>
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#include <__iterator/iter_move.h>
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#include <__iterator/iterator_traits.h>
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#include <__iterator/readable_traits.h>
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#include <__memory/concepts.h>
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#include <__memory/uninitialized_algorithms.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__ranges/dangling.h>
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#include <__type_traits/remove_reference.h>
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#include <__utility/move.h>
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#include <new>
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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 >= 20
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namespace ranges {
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// uninitialized_default_construct
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namespace __uninitialized_default_construct {
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struct __fn {
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template <__nothrow_forward_iterator _ForwardIterator,
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__nothrow_sentinel_for<_ForwardIterator> _Sentinel>
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requires default_initializable<iter_value_t<_ForwardIterator>>
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_LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last) const {
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using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
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return _VSTD::__uninitialized_default_construct<_ValueType>(
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_VSTD::move(__first), _VSTD::move(__last));
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}
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template <__nothrow_forward_range _ForwardRange>
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requires default_initializable<range_value_t<_ForwardRange>>
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_LIBCPP_HIDE_FROM_ABI borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range) const {
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return (*this)(ranges::begin(__range), ranges::end(__range));
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}
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};
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} // namespace __uninitialized_default_construct
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inline namespace __cpo {
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inline constexpr auto uninitialized_default_construct = __uninitialized_default_construct::__fn{};
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} // namespace __cpo
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// uninitialized_default_construct_n
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namespace __uninitialized_default_construct_n {
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struct __fn {
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template <__nothrow_forward_iterator _ForwardIterator>
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requires default_initializable<iter_value_t<_ForwardIterator>>
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_LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first,
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iter_difference_t<_ForwardIterator> __n) const {
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using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
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return _VSTD::__uninitialized_default_construct_n<_ValueType>(_VSTD::move(__first), __n);
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}
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};
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} // namespace __uninitialized_default_construct_n
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inline namespace __cpo {
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inline constexpr auto uninitialized_default_construct_n = __uninitialized_default_construct_n::__fn{};
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} // namespace __cpo
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// uninitialized_value_construct
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namespace __uninitialized_value_construct {
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struct __fn {
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template <__nothrow_forward_iterator _ForwardIterator,
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__nothrow_sentinel_for<_ForwardIterator> _Sentinel>
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requires default_initializable<iter_value_t<_ForwardIterator>>
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_LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last) const {
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using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
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return _VSTD::__uninitialized_value_construct<_ValueType>(
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_VSTD::move(__first), _VSTD::move(__last));
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}
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template <__nothrow_forward_range _ForwardRange>
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requires default_initializable<range_value_t<_ForwardRange>>
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_LIBCPP_HIDE_FROM_ABI borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range) const {
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return (*this)(ranges::begin(__range), ranges::end(__range));
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}
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};
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} // namespace __uninitialized_value_construct
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inline namespace __cpo {
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inline constexpr auto uninitialized_value_construct = __uninitialized_value_construct::__fn{};
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} // namespace __cpo
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// uninitialized_value_construct_n
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namespace __uninitialized_value_construct_n {
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struct __fn {
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template <__nothrow_forward_iterator _ForwardIterator>
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requires default_initializable<iter_value_t<_ForwardIterator>>
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_LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first,
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iter_difference_t<_ForwardIterator> __n) const {
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using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
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return _VSTD::__uninitialized_value_construct_n<_ValueType>(_VSTD::move(__first), __n);
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}
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};
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} // namespace __uninitialized_value_construct_n
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inline namespace __cpo {
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inline constexpr auto uninitialized_value_construct_n = __uninitialized_value_construct_n::__fn{};
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} // namespace __cpo
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// uninitialized_fill
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namespace __uninitialized_fill {
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struct __fn {
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template <__nothrow_forward_iterator _ForwardIterator,
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__nothrow_sentinel_for<_ForwardIterator> _Sentinel,
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class _Tp>
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requires constructible_from<iter_value_t<_ForwardIterator>, const _Tp&>
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_LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first, _Sentinel __last, const _Tp& __x) const {
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using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
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return _VSTD::__uninitialized_fill<_ValueType>(_VSTD::move(__first), _VSTD::move(__last), __x);
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}
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template <__nothrow_forward_range _ForwardRange, class _Tp>
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requires constructible_from<range_value_t<_ForwardRange>, const _Tp&>
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_LIBCPP_HIDE_FROM_ABI borrowed_iterator_t<_ForwardRange> operator()(_ForwardRange&& __range, const _Tp& __x) const {
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return (*this)(ranges::begin(__range), ranges::end(__range), __x);
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}
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};
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} // namespace __uninitialized_fill
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inline namespace __cpo {
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inline constexpr auto uninitialized_fill = __uninitialized_fill::__fn{};
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} // namespace __cpo
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// uninitialized_fill_n
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namespace __uninitialized_fill_n {
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struct __fn {
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template <__nothrow_forward_iterator _ForwardIterator, class _Tp>
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requires constructible_from<iter_value_t<_ForwardIterator>, const _Tp&>
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_LIBCPP_HIDE_FROM_ABI _ForwardIterator operator()(_ForwardIterator __first,
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iter_difference_t<_ForwardIterator> __n,
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const _Tp& __x) const {
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using _ValueType = remove_reference_t<iter_reference_t<_ForwardIterator>>;
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return _VSTD::__uninitialized_fill_n<_ValueType>(_VSTD::move(__first), __n, __x);
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}
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};
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} // namespace __uninitialized_fill_n
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inline namespace __cpo {
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inline constexpr auto uninitialized_fill_n = __uninitialized_fill_n::__fn{};
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} // namespace __cpo
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// uninitialized_copy
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template <class _InputIterator, class _OutputIterator>
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using uninitialized_copy_result = in_out_result<_InputIterator, _OutputIterator>;
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namespace __uninitialized_copy {
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struct __fn {
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template <input_iterator _InputIterator,
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sentinel_for<_InputIterator> _Sentinel1,
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__nothrow_forward_iterator _OutputIterator,
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__nothrow_sentinel_for<_OutputIterator> _Sentinel2>
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requires constructible_from<iter_value_t<_OutputIterator>, iter_reference_t<_InputIterator>>
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_LIBCPP_HIDE_FROM_ABI uninitialized_copy_result<_InputIterator, _OutputIterator>
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operator()(_InputIterator __ifirst, _Sentinel1 __ilast, _OutputIterator __ofirst, _Sentinel2 __olast) const {
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using _ValueType = remove_reference_t<iter_reference_t<_OutputIterator>>;
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auto __stop_copying = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
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auto __result = std::__uninitialized_copy<_ValueType>(
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std::move(__ifirst), std::move(__ilast), std::move(__ofirst), __stop_copying);
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return {_VSTD::move(__result.first), _VSTD::move(__result.second)};
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}
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template <input_range _InputRange, __nothrow_forward_range _OutputRange>
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requires constructible_from<range_value_t<_OutputRange>, range_reference_t<_InputRange>>
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_LIBCPP_HIDE_FROM_ABI uninitialized_copy_result<borrowed_iterator_t<_InputRange>, borrowed_iterator_t<_OutputRange>>
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operator()( _InputRange&& __in_range, _OutputRange&& __out_range) const {
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return (*this)(ranges::begin(__in_range), ranges::end(__in_range),
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ranges::begin(__out_range), ranges::end(__out_range));
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}
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};
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} // namespace __uninitialized_copy
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inline namespace __cpo {
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inline constexpr auto uninitialized_copy = __uninitialized_copy::__fn{};
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} // namespace __cpo
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// uninitialized_copy_n
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template <class _InputIterator, class _OutputIterator>
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using uninitialized_copy_n_result = in_out_result<_InputIterator, _OutputIterator>;
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namespace __uninitialized_copy_n {
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struct __fn {
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template <input_iterator _InputIterator,
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__nothrow_forward_iterator _OutputIterator,
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__nothrow_sentinel_for<_OutputIterator> _Sentinel>
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requires constructible_from<iter_value_t<_OutputIterator>, iter_reference_t<_InputIterator>>
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_LIBCPP_HIDE_FROM_ABI uninitialized_copy_n_result<_InputIterator, _OutputIterator>
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operator()(_InputIterator __ifirst, iter_difference_t<_InputIterator> __n,
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_OutputIterator __ofirst, _Sentinel __olast) const {
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using _ValueType = remove_reference_t<iter_reference_t<_OutputIterator>>;
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auto __stop_copying = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
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auto __result =
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std::__uninitialized_copy_n<_ValueType>(std::move(__ifirst), __n, std::move(__ofirst), __stop_copying);
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return {_VSTD::move(__result.first), _VSTD::move(__result.second)};
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}
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};
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} // namespace __uninitialized_copy_n
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inline namespace __cpo {
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inline constexpr auto uninitialized_copy_n = __uninitialized_copy_n::__fn{};
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} // namespace __cpo
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// uninitialized_move
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template <class _InputIterator, class _OutputIterator>
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using uninitialized_move_result = in_out_result<_InputIterator, _OutputIterator>;
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namespace __uninitialized_move {
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struct __fn {
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template <input_iterator _InputIterator,
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sentinel_for<_InputIterator> _Sentinel1,
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__nothrow_forward_iterator _OutputIterator,
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__nothrow_sentinel_for<_OutputIterator> _Sentinel2>
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requires constructible_from<iter_value_t<_OutputIterator>, iter_rvalue_reference_t<_InputIterator>>
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_LIBCPP_HIDE_FROM_ABI uninitialized_move_result<_InputIterator, _OutputIterator>
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operator()(_InputIterator __ifirst, _Sentinel1 __ilast, _OutputIterator __ofirst, _Sentinel2 __olast) const {
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using _ValueType = remove_reference_t<iter_reference_t<_OutputIterator>>;
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auto __iter_move = [](auto&& __iter) -> decltype(auto) { return ranges::iter_move(__iter); };
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auto __stop_moving = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
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auto __result = std::__uninitialized_move<_ValueType>(
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std::move(__ifirst), std::move(__ilast), std::move(__ofirst), __stop_moving, __iter_move);
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return {_VSTD::move(__result.first), _VSTD::move(__result.second)};
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}
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template <input_range _InputRange, __nothrow_forward_range _OutputRange>
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requires constructible_from<range_value_t<_OutputRange>, range_rvalue_reference_t<_InputRange>>
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_LIBCPP_HIDE_FROM_ABI uninitialized_move_result<borrowed_iterator_t<_InputRange>, borrowed_iterator_t<_OutputRange>>
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operator()(_InputRange&& __in_range, _OutputRange&& __out_range) const {
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return (*this)(ranges::begin(__in_range), ranges::end(__in_range),
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ranges::begin(__out_range), ranges::end(__out_range));
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}
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};
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} // namespace __uninitialized_move
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inline namespace __cpo {
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inline constexpr auto uninitialized_move = __uninitialized_move::__fn{};
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} // namespace __cpo
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// uninitialized_move_n
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template <class _InputIterator, class _OutputIterator>
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using uninitialized_move_n_result = in_out_result<_InputIterator, _OutputIterator>;
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namespace __uninitialized_move_n {
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struct __fn {
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template <input_iterator _InputIterator,
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__nothrow_forward_iterator _OutputIterator,
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__nothrow_sentinel_for<_OutputIterator> _Sentinel>
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requires constructible_from<iter_value_t<_OutputIterator>, iter_rvalue_reference_t<_InputIterator>>
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_LIBCPP_HIDE_FROM_ABI uninitialized_move_n_result<_InputIterator, _OutputIterator>
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operator()(_InputIterator __ifirst, iter_difference_t<_InputIterator> __n,
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_OutputIterator __ofirst, _Sentinel __olast) const {
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using _ValueType = remove_reference_t<iter_reference_t<_OutputIterator>>;
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auto __iter_move = [](auto&& __iter) -> decltype(auto) { return ranges::iter_move(__iter); };
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auto __stop_moving = [&__olast](auto&& __out_iter) -> bool { return __out_iter == __olast; };
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auto __result = std::__uninitialized_move_n<_ValueType>(
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std::move(__ifirst), __n, std::move(__ofirst), __stop_moving, __iter_move);
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return {_VSTD::move(__result.first), _VSTD::move(__result.second)};
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}
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};
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} // namespace __uninitialized_move_n
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inline namespace __cpo {
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inline constexpr auto uninitialized_move_n = __uninitialized_move_n::__fn{};
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} // namespace __cpo
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} // namespace ranges
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___MEMORY_RANGES_UNINITIALIZED_ALGORITHMS_H
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