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
24template <class _Tp>
25struct _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr_ref
26{
27    _Tp* __ptr_;
28};
29
30template<class _Tp>
31class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr
32{
33private:
34    _Tp* __ptr_;
35public:
36    typedef _Tp element_type;
37
38    _LIBCPP_INLINE_VISIBILITY explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {}
39    _LIBCPP_INLINE_VISIBILITY auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {}
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;}
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_;}
53    _LIBCPP_INLINE_VISIBILITY _Tp* get() const _NOEXCEPT {return __ptr_;}
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
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
74template <>
75class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void>
76{
77public:
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