__cxx03/__algorithm/ranges_fill.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___CXX03___ALGORITHM_RANGES_FILL_H
0010 #define _LIBCPP___CXX03___ALGORITHM_RANGES_FILL_H
0011
0012 #include <__cxx03/__algorithm/ranges_fill_n.h>
0013 #include <__cxx03/__config>
0014 #include <__cxx03/__iterator/concepts.h>
0015 #include <__cxx03/__ranges/access.h>
0016 #include <__cxx03/__ranges/concepts.h>
0017 #include <__cxx03/__ranges/dangling.h>
0018
0019 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0020 #  pragma GCC system_header
0021 #endif
0022
0023 _LIBCPP_PUSH_MACROS
0024 #include <__cxx03/__undef_macros>
0025
0026 #if _LIBCPP_STD_VER >= 20
0027
0028 _LIBCPP_BEGIN_NAMESPACE_STD
0029
0030 namespace ranges {
0031 namespace __fill {
0032 struct __fn {
0033   template <class _Type, output_iterator<const _Type&> _Iter, sentinel_for<_Iter> _Sent>
0034   _LIBCPP_HIDE_FROM_ABI constexpr _Iter operator()(_Iter __first, _Sent __last, const _Type& __value) const {
0035     if constexpr (random_access_iterator<_Iter> && sized_sentinel_for<_Sent, _Iter>) {
0036       return ranges::fill_n(__first, __last - __first, __value);
0037     } else {
0038       for (; __first != __last; ++__first)
0039         *__first = __value;
0040       return __first;
0041     }
0042   }
0043
0044   template <class _Type, output_range<const _Type&> _Range>
0045   _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range> operator()(_Range&& __range, const _Type& __value) const {
0046     return (*this)(ranges::begin(__range), ranges::end(__range), __value);
0047   }
0048 };
0049 } // namespace __fill
0050
0051 inline namespace __cpo {
0052 inline constexpr auto fill = __fill::__fn{};
0053 } // namespace __cpo
0054 } // namespace ranges
0055
0056 _LIBCPP_END_NAMESPACE_STD
0057
0058 #endif // _LIBCPP_STD_VER >= 20
0059
0060 _LIBCPP_POP_MACROS
0061
0062 #endif // _LIBCPP___CXX03___ALGORITHM_RANGES_FILL_H