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___MEMORY_AUTO_PTR_H 11 #define _LIBCPP___MEMORY_AUTO_PTR_H 12 13 #include <__config> 14 15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16 # pragma GCC system_header 17 #endif 18 19 #if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 20 21 _LIBCPP_BEGIN_NAMESPACE_STD 22 23 template <class _Tp> 24 struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref { 25 _Tp* __ptr_; 26 }; 27 28 template <class _Tp> 29 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr { 30 private: 31 _Tp* __ptr_; 32 33 public: 34 typedef _Tp element_type; 35 __ptr_(__p)36 _LIBCPP_HIDE_FROM_ABI explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} auto_ptr(auto_ptr & __p)37 _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} 38 template <class _Up> auto_ptr(auto_ptr<_Up> & __p)39 _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT : __ptr_(__p.release()) {} 40 _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT { 41 reset(__p.release()); 42 return *this; 43 } 44 template <class _Up> 45 _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT { 46 reset(__p.release()); 47 return *this; 48 } 49 _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT { 50 reset(__p.__ptr_); 51 return *this; 52 } ~auto_ptr()53 _LIBCPP_HIDE_FROM_ABI ~auto_ptr() _NOEXCEPT { delete __ptr_; } 54 55 _LIBCPP_HIDE_FROM_ABI _Tp& operator*() const _NOEXCEPT { return *__ptr_; } 56 _LIBCPP_HIDE_FROM_ABI _Tp* operator->() const _NOEXCEPT { return __ptr_; } get()57 _LIBCPP_HIDE_FROM_ABI _Tp* get() const _NOEXCEPT { return __ptr_; } release()58 _LIBCPP_HIDE_FROM_ABI _Tp* release() _NOEXCEPT { 59 _Tp* __t = __ptr_; 60 __ptr_ = nullptr; 61 return __t; 62 } 63 _LIBCPP_HIDE_FROM_ABI void reset(_Tp* __p = 0) _NOEXCEPT { 64 if (__ptr_ != __p) 65 delete __ptr_; 66 __ptr_ = __p; 67 } 68 auto_ptr(auto_ptr_ref<_Tp> __p)69 _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 70 template <class _Up> 71 _LIBCPP_HIDE_FROM_ABI operator auto_ptr_ref<_Up>() _NOEXCEPT { 72 auto_ptr_ref<_Up> __t; 73 __t.__ptr_ = release(); 74 return __t; 75 } 76 template <class _Up> 77 _LIBCPP_HIDE_FROM_ABI operator auto_ptr<_Up>() _NOEXCEPT { 78 return auto_ptr<_Up>(release()); 79 } 80 }; 81 82 template <> 83 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> { 84 public: 85 typedef void element_type; 86 }; 87 88 _LIBCPP_END_NAMESPACE_STD 89 90 #endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 91 92 #endif // _LIBCPP___MEMORY_AUTO_PTR_H 93