| // -*- C++ -*- |
| //===----------------------------------------------------------------------===// |
| // |
| // 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___ITERATOR_FRONT_INSERT_ITERATOR_H |
| #define _LIBCPP___ITERATOR_FRONT_INSERT_ITERATOR_H |
| |
| #include <__config> |
| #include <__iterator/iterator.h> |
| #include <__iterator/iterator_traits.h> |
| #include <__memory/addressof.h> |
| #include <__utility/move.h> |
| #include <cstddef> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| #pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| _LIBCPP_SUPPRESS_DEPRECATED_PUSH |
| template <class _Container> |
| class _LIBCPP_TEMPLATE_VIS front_insert_iterator |
| #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) |
| : public iterator<output_iterator_tag, void, void, void, void> |
| #endif |
| { |
| _LIBCPP_SUPPRESS_DEPRECATED_POP |
| protected: |
| _Container* container; |
| public: |
| typedef output_iterator_tag iterator_category; |
| typedef void value_type; |
| #if _LIBCPP_STD_VER > 17 |
| typedef ptrdiff_t difference_type; |
| #else |
| typedef void difference_type; |
| #endif |
| typedef void pointer; |
| typedef void reference; |
| typedef _Container container_type; |
| |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 explicit front_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(const typename _Container::value_type& __value_) |
| {container->push_front(__value_); return *this;} |
| #ifndef _LIBCPP_CXX03_LANG |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator=(typename _Container::value_type&& __value_) |
| {container->push_front(_VSTD::move(__value_)); return *this;} |
| #endif // _LIBCPP_CXX03_LANG |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator*() {return *this;} |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator& operator++() {return *this;} |
| _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 front_insert_iterator operator++(int) {return *this;} |
| }; |
| |
| template <class _Container> |
| inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17 |
| front_insert_iterator<_Container> |
| front_inserter(_Container& __x) |
| { |
| return front_insert_iterator<_Container>(__x); |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ITERATOR_FRONT_INSERT_ITERATOR_H |