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___CXX03___MEMORY_AUTO_PTR_H 11 #define _LIBCPP___CXX03___MEMORY_AUTO_PTR_H 12 13 #include <__cxx03/__config> 14 15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16 # pragma GCC system_header 17 #endif 18 19 _LIBCPP_BEGIN_NAMESPACE_STD 20 21 template <class _Tp> 22 struct auto_ptr_ref { 23 _Tp* __ptr_; 24 }; 25 26 template <class _Tp> 27 class _LIBCPP_TEMPLATE_VIS auto_ptr { 28 private: 29 _Tp* __ptr_; 30 31 public: 32 typedef _Tp element_type; 33 __ptr_(__p)34 _LIBCPP_HIDE_FROM_ABI explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} auto_ptr(auto_ptr & __p)35 _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} 36 template <class _Up> auto_ptr(auto_ptr<_Up> & __p)37 _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT : __ptr_(__p.release()) {} 38 _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT { 39 reset(__p.release()); 40 return *this; 41 } 42 template <class _Up> 43 _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT { 44 reset(__p.release()); 45 return *this; 46 } 47 _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT { 48 reset(__p.__ptr_); 49 return *this; 50 } ~auto_ptr()51 _LIBCPP_HIDE_FROM_ABI ~auto_ptr() _NOEXCEPT { delete __ptr_; } 52 53 _LIBCPP_HIDE_FROM_ABI _Tp& operator*() const _NOEXCEPT { return *__ptr_; } 54 _LIBCPP_HIDE_FROM_ABI _Tp* operator->() const _NOEXCEPT { return __ptr_; } get()55 _LIBCPP_HIDE_FROM_ABI _Tp* get() const _NOEXCEPT { return __ptr_; } release()56 _LIBCPP_HIDE_FROM_ABI _Tp* release() _NOEXCEPT { 57 _Tp* __t = __ptr_; 58 __ptr_ = nullptr; 59 return __t; 60 } 61 _LIBCPP_HIDE_FROM_ABI void reset(_Tp* __p = 0) _NOEXCEPT { 62 if (__ptr_ != __p) 63 delete __ptr_; 64 __ptr_ = __p; 65 } 66 auto_ptr(auto_ptr_ref<_Tp> __p)67 _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 68 template <class _Up> 69 _LIBCPP_HIDE_FROM_ABI operator auto_ptr_ref<_Up>() _NOEXCEPT { 70 auto_ptr_ref<_Up> __t; 71 __t.__ptr_ = release(); 72 return __t; 73 } 74 template <class _Up> 75 _LIBCPP_HIDE_FROM_ABI operator auto_ptr<_Up>() _NOEXCEPT { 76 return auto_ptr<_Up>(release()); 77 } 78 }; 79 80 template <> 81 class _LIBCPP_TEMPLATE_VIS auto_ptr<void> { 82 public: 83 typedef void element_type; 84 }; 85 86 _LIBCPP_END_NAMESPACE_STD 87 88 #endif // _LIBCPP___CXX03___MEMORY_AUTO_PTR_H 89