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 { 26 _Tp* __ptr_; 27 }; 28 29 template<class _Tp> 30 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr 31 { 32 private: 33 _Tp* __ptr_; 34 public: 35 typedef _Tp element_type; 36 __ptr_(__p)37 _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} auto_ptr(auto_ptr & __p)38 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} auto_ptr(auto_ptr<_Up> & __p)39 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT 40 : __ptr_(__p.release()) {} 41 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT 42 {reset(__p.release()); return *this;} 43 template<class _Up> _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT 44 {reset(__p.release()); return *this;} 45 _LIBCPP_INLINE_VISIBILITY auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT 46 {reset(__p.__ptr_); return *this;} ~auto_ptr()47 _LIBCPP_INLINE_VISIBILITY ~auto_ptr() _NOEXCEPT {delete __ptr_;} 48 49 _LIBCPP_INLINE_VISIBILITY _Tp& operator*() const _NOEXCEPT 50 {return *__ptr_;} 51 _LIBCPP_INLINE_VISIBILITY _Tp* operator->() const _NOEXCEPT {return __ptr_;} get()52 _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;} release()53 _LIBCPP_INLINE_VISIBILITY _Tp* release() _NOEXCEPT 54 { 55 _Tp* __t = __ptr_; 56 __ptr_ = nullptr; 57 return __t; 58 } 59 _LIBCPP_INLINE_VISIBILITY void reset(_Tp* __p = 0) _NOEXCEPT 60 { 61 if (__ptr_ != __p) 62 delete __ptr_; 63 __ptr_ = __p; 64 } 65 auto_ptr(auto_ptr_ref<_Tp> __p)66 _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} 67 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr_ref<_Up>() _NOEXCEPT 68 {auto_ptr_ref<_Up> __t; __t.__ptr_ = release(); return __t;} 69 template<class _Up> _LIBCPP_INLINE_VISIBILITY operator auto_ptr<_Up>() _NOEXCEPT 70 {return auto_ptr<_Up>(release());} 71 }; 72 73 template <> 74 class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> 75 { 76 public: 77 typedef void element_type; 78 }; 79 80 _LIBCPP_END_NAMESPACE_STD 81 82 #endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR) 83 84 #endif // _LIBCPP___MEMORY_AUTO_PTR_H 85