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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___CXX03___ALGORITHM_UNWRAP_RANGE_H |
| 10 | #define _LIBCPP___CXX03___ALGORITHM_UNWRAP_RANGE_H |
| 11 | |
| 12 | #include <__cxx03/__algorithm/unwrap_iter.h> |
| 13 | #include <__cxx03/__config> |
| 14 | #include <__cxx03/__iterator/next.h> |
| 15 | #include <__cxx03/__utility/declval.h> |
| 16 | #include <__cxx03/__utility/move.h> |
| 17 | #include <__cxx03/__utility/pair.h> |
| 18 | |
| 19 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 20 | # pragma GCC system_header |
| 21 | #endif |
| 22 | |
| 23 | _LIBCPP_PUSH_MACROS |
| 24 | #include <__cxx03/__undef_macros> |
| 25 | |
| 26 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 27 | |
| 28 | // __unwrap_range and __rewrap_range are used to unwrap ranges which may have different iterator and sentinel types. |
| 29 | // __unwrap_iter and __rewrap_iter don't work for this, because they assume that the iterator and sentinel have |
| 30 | // the same type. __unwrap_range tries to get two iterators and then forward to __unwrap_iter. |
| 31 | |
| 32 | template <class _Iter, class _Unwrapped = decltype(std::__unwrap_iter(std::declval<_Iter>()))> |
| 33 | _LIBCPP_HIDE_FROM_ABI pair<_Unwrapped, _Unwrapped> __unwrap_range(_Iter __first, _Iter __last) { |
| 34 | return std::make_pair(std::__unwrap_iter(std::move(__first)), std::__unwrap_iter(std::move(__last))); |
| 35 | } |
| 36 | |
| 37 | template <class _Iter, class _Unwrapped> |
| 38 | _LIBCPP_HIDE_FROM_ABI _Iter __rewrap_range(_Iter __orig_iter, _Unwrapped __iter) { |
| 39 | return std::__rewrap_iter(std::move(__orig_iter), std::move(__iter)); |
| 40 | } |
| 41 | |
| 42 | _LIBCPP_END_NAMESPACE_STD |
| 43 | |
| 44 | _LIBCPP_POP_MACROS |
| 45 | |
| 46 | #endif // _LIBCPP___CXX03___ALGORITHM_UNWRAP_RANGE_H |
| 47 |
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