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| 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___CXX03___MEMORY_AUTO_PTR_H |
| 11 | #define _LIBCPP___CXX03___MEMORY_AUTO_PTR_H |
| 12 | |
| 13 | #include <__cxx03/__config> |
| 14 | |
| 15 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 16 | # pragma GCC system_header |
| 17 | #endif |
| 18 | |
| 19 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 20 | |
| 21 | template <class _Tp> |
| 22 | struct auto_ptr_ref { |
| 23 | _Tp* __ptr_; |
| 24 | }; |
| 25 | |
| 26 | template <class _Tp> |
| 27 | class _LIBCPP_TEMPLATE_VIS auto_ptr { |
| 28 | private: |
| 29 | _Tp* __ptr_; |
| 30 | |
| 31 | public: |
| 32 | typedef _Tp element_type; |
| 33 | |
| 34 | _LIBCPP_HIDE_FROM_ABI explicit auto_ptr(_Tp* __p = 0) _NOEXCEPT : __ptr_(__p) {} |
| 35 | _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr& __p) _NOEXCEPT : __ptr_(__p.release()) {} |
| 36 | template <class _Up> |
| 37 | _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr<_Up>& __p) _NOEXCEPT : __ptr_(__p.release()) {} |
| 38 | _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr& __p) _NOEXCEPT { |
| 39 | reset(__p.release()); |
| 40 | return *this; |
| 41 | } |
| 42 | template <class _Up> |
| 43 | _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr<_Up>& __p) _NOEXCEPT { |
| 44 | reset(__p.release()); |
| 45 | return *this; |
| 46 | } |
| 47 | _LIBCPP_HIDE_FROM_ABI auto_ptr& operator=(auto_ptr_ref<_Tp> __p) _NOEXCEPT { |
| 48 | reset(__p.__ptr_); |
| 49 | return *this; |
| 50 | } |
| 51 | _LIBCPP_HIDE_FROM_ABI ~auto_ptr() _NOEXCEPT { delete __ptr_; } |
| 52 | |
| 53 | _LIBCPP_HIDE_FROM_ABI _Tp& operator*() const _NOEXCEPT { return *__ptr_; } |
| 54 | _LIBCPP_HIDE_FROM_ABI _Tp* operator->() const _NOEXCEPT { return __ptr_; } |
| 55 | _LIBCPP_HIDE_FROM_ABI _Tp* get() const _NOEXCEPT { return __ptr_; } |
| 56 | _LIBCPP_HIDE_FROM_ABI _Tp* release() _NOEXCEPT { |
| 57 | _Tp* __t = __ptr_; |
| 58 | __ptr_ = nullptr; |
| 59 | return __t; |
| 60 | } |
| 61 | _LIBCPP_HIDE_FROM_ABI void reset(_Tp* __p = 0) _NOEXCEPT { |
| 62 | if (__ptr_ != __p) |
| 63 | delete __ptr_; |
| 64 | __ptr_ = __p; |
| 65 | } |
| 66 | |
| 67 | _LIBCPP_HIDE_FROM_ABI auto_ptr(auto_ptr_ref<_Tp> __p) _NOEXCEPT : __ptr_(__p.__ptr_) {} |
| 68 | template <class _Up> |
| 69 | _LIBCPP_HIDE_FROM_ABI operator auto_ptr_ref<_Up>() _NOEXCEPT { |
| 70 | auto_ptr_ref<_Up> __t; |
| 71 | __t.__ptr_ = release(); |
| 72 | return __t; |
| 73 | } |
| 74 | template <class _Up> |
| 75 | _LIBCPP_HIDE_FROM_ABI operator auto_ptr<_Up>() _NOEXCEPT { |
| 76 | return auto_ptr<_Up>(release()); |
| 77 | } |
| 78 | }; |
| 79 | |
| 80 | template <> |
| 81 | class _LIBCPP_TEMPLATE_VIS auto_ptr<void> { |
| 82 | public: |
| 83 | typedef void element_type; |
| 84 | }; |
| 85 | |
| 86 | _LIBCPP_END_NAMESPACE_STD |
| 87 | |
| 88 | #endif // _LIBCPP___CXX03___MEMORY_AUTO_PTR_H |
| 89 |
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