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