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
23template <class _Tp>
24struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref
25{
26    _Tp* __ptr_;
27};
28
29template<class _Tp>
30class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr
31{
32private:
33    _Tp* __ptr_;
34public:
35    typedef _Tp element_type;
36
37    _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {}
38    _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {}
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;}
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_;}
52    _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;}
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
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
73template <>
74class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void>
75{
76public:
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