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  _Tp* __ptr_;
26};
27
28template <class _Tp>
29class _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr {
30private:
31  _Tp* __ptr_;
32
33public:
34  typedef _Tp element_type;
35
36  _LIBCPP_HIDE_FROM_ABI explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {}
37  _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {}
38  template <class _Up>
39  _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT : __ptr_(__p.release()) {}
40  _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT {
41    reset(__p.release());
42    return *this;
43  }
44  template <class _Up>
45  _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT {
46    reset(__p.release());
47    return *this;
48  }
49  _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT {
50    reset(__p.__ptr_);
51    return *this;
52  }
53  _LIBCPP_HIDE_FROM_ABI ~auto_ptr() _NOEXCEPT { delete __ptr_; }
54
55  _LIBCPP_HIDE_FROM_ABI _Tp& operator*() const _NOEXCEPT { return *__ptr_; }
56  _LIBCPP_HIDE_FROM_ABI _Tp* operator->() const _NOEXCEPT { return __ptr_; }
57  _LIBCPP_HIDE_FROM_ABI _Tp* get() const _NOEXCEPT { return __ptr_; }
58  _LIBCPP_HIDE_FROM_ABI _Tp* release() _NOEXCEPT {
59    _Tp* __t = __ptr_;
60    __ptr_   = nullptr;
61    return __t;
62  }
63  _LIBCPP_HIDE_FROM_ABI void reset(_Tp* __p = 0) _NOEXCEPT {
64    if (__ptr_ != __p)
65      delete __ptr_;
66    __ptr_ = __p;
67  }
68
69  _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {}
70  template <class _Up>
71  _LIBCPP_HIDE_FROM_ABI operator auto_ptr_ref<_Up>() _NOEXCEPT {
72    auto_ptr_ref<_Up> __t;
73    __t.__ptr_ = release();
74    return __t;
75  }
76  template <class _Up>
77  _LIBCPP_HIDE_FROM_ABI operator auto_ptr<_Up>() _NOEXCEPT {
78    return auto_ptr<_Up>(release());
79  }
80};
81
82template <>
83class _LIBCPP_DEPRECATED_IN_CXX11 auto_ptr<void> {
84public:
85  typedef void element_type;
86};
87
88_LIBCPP_END_NAMESPACE_STD
89
90#endif // _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_AUTO_PTR)
91
92#endif // _LIBCPP___MEMORY_AUTO_PTR_H