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| 1 | // -*- C++ -*- |
|---|---|
| 2 | //===----------------------------------------------------------------------===// |
| 3 | // |
| 4 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 5 | // See https://llvm.org/LICENSE.txt for license information. |
| 6 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 7 | // |
| 8 | //===----------------------------------------------------------------------===// |
| 9 | |
| 10 | #ifndef _LIBCPP___ITERATOR_FRONT_INSERT_ITERATOR_H |
| 11 | #define _LIBCPP___ITERATOR_FRONT_INSERT_ITERATOR_H |
| 12 | |
| 13 | #include <__config> |
| 14 | #include <__cstddef/ptrdiff_t.h> |
| 15 | #include <__iterator/iterator.h> |
| 16 | #include <__iterator/iterator_traits.h> |
| 17 | #include <__memory/addressof.h> |
| 18 | #include <__utility/move.h> |
| 19 | |
| 20 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 21 | # pragma GCC system_header |
| 22 | #endif |
| 23 | |
| 24 | _LIBCPP_PUSH_MACROS |
| 25 | #include <__undef_macros> |
| 26 | |
| 27 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 28 | |
| 29 | _LIBCPP_SUPPRESS_DEPRECATED_PUSH |
| 30 | template <class _Container> |
| 31 | class front_insert_iterator |
| 32 | #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) |
| 33 | : public iterator<output_iterator_tag, void, void, void, void> |
| 34 | #endif |
| 35 | { |
| 36 | _LIBCPP_SUPPRESS_DEPRECATED_POP |
| 37 | |
| 38 | protected: |
| 39 | _Container* container; |
| 40 | |
| 41 | public: |
| 42 | typedef output_iterator_tag iterator_category; |
| 43 | typedef void value_type; |
| 44 | #if _LIBCPP_STD_VER >= 20 |
| 45 | typedef ptrdiff_t difference_type; |
| 46 | #else |
| 47 | typedef void difference_type; |
| 48 | #endif |
| 49 | typedef void pointer; |
| 50 | typedef void reference; |
| 51 | typedef _Container container_type; |
| 52 | |
| 53 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit front_insert_iterator(_Container& __x) |
| 54 | : container(std::addressof(__x)) {} |
| 55 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 front_insert_iterator& |
| 56 | operator=(const typename _Container::value_type& __value) { |
| 57 | container->push_front(__value); |
| 58 | return *this; |
| 59 | } |
| 60 | #ifndef _LIBCPP_CXX03_LANG |
| 61 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 front_insert_iterator& |
| 62 | operator=(typename _Container::value_type&& __value) { |
| 63 | container->push_front(std::move(__value)); |
| 64 | return *this; |
| 65 | } |
| 66 | #endif // _LIBCPP_CXX03_LANG |
| 67 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 front_insert_iterator& operator*() { return *this; } |
| 68 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 front_insert_iterator& operator++() { return *this; } |
| 69 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 front_insert_iterator operator++(int) { return *this; } |
| 70 | }; |
| 71 | _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(front_insert_iterator); |
| 72 | |
| 73 | template <class _Container> |
| 74 | inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 front_insert_iterator<_Container> |
| 75 | front_inserter(_Container& __x) { |
| 76 | return front_insert_iterator<_Container>(__x); |
| 77 | } |
| 78 | |
| 79 | _LIBCPP_END_NAMESPACE_STD |
| 80 | |
| 81 | _LIBCPP_POP_MACROS |
| 82 | |
| 83 | #endif // _LIBCPP___ITERATOR_FRONT_INSERT_ITERATOR_H |
| 84 |
Warning: This file is not a C or C++ file. It does not have highlighting.