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