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_BACK_INSERT_ITERATOR_H 11 #define _LIBCPP___ITERATOR_BACK_INSERT_ITERATOR_H 12 13 #include <__config> 14 #include <__iterator/iterator.h> 15 #include <__iterator/iterator_traits.h> 16 #include <__memory/addressof.h> 17 #include <__utility/move.h> 18 #include <cstddef> 19 20 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 21 # pragma GCC system_header 22 #endif 23 24 _LIBCPP_BEGIN_NAMESPACE_STD 25 26 _LIBCPP_SUPPRESS_DEPRECATED_PUSH 27 template <class _Container> 28 class _LIBCPP_TEMPLATE_VIS back_insert_iterator 29 #if _LIBCPP_STD_VER <= 14 || !defined(_LIBCPP_ABI_NO_ITERATOR_BASES) 30 : public iterator<output_iterator_tag, void, void, void, void> 31 #endif 32 { 33 _LIBCPP_SUPPRESS_DEPRECATED_POP 34 protected: 35 _Container* container; 36 public: 37 typedef output_iterator_tag iterator_category; 38 typedef void value_type; 39 #if _LIBCPP_STD_VER >= 20 40 typedef ptrdiff_t difference_type; 41 #else 42 typedef void difference_type; 43 #endif 44 typedef void pointer; 45 typedef void reference; 46 typedef _Container container_type; 47 back_insert_iterator(_Container & __x)48 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 explicit back_insert_iterator(_Container& __x) : container(_VSTD::addressof(__x)) {} 49 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 back_insert_iterator& operator=(const typename _Container::value_type& __value) 50 {container->push_back(__value); return *this;} 51 #ifndef _LIBCPP_CXX03_LANG 52 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 back_insert_iterator& operator=(typename _Container::value_type&& __value) 53 {container->push_back(_VSTD::move(__value)); return *this;} 54 #endif // _LIBCPP_CXX03_LANG 55 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 back_insert_iterator& operator*() {return *this;} 56 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 back_insert_iterator& operator++() {return *this;} 57 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 back_insert_iterator operator++(int) {return *this;} 58 __get_container()59 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 _Container* __get_container() const { return container; } 60 }; 61 _LIBCPP_CTAD_SUPPORTED_FOR_TYPE(back_insert_iterator); 62 63 template <class _Container> 64 inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 65 back_insert_iterator<_Container> back_inserter(_Container & __x)66back_inserter(_Container& __x) 67 { 68 return back_insert_iterator<_Container>(__x); 69 } 70 71 _LIBCPP_END_NAMESPACE_STD 72 73 #endif // _LIBCPP___ITERATOR_BACK_INSERT_ITERATOR_H 74