785 lines
23 KiB
C++
785 lines
23 KiB
C++
// unique_ptr implementation -*- C++ -*-
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// Copyright (C) 2008-2015 Free Software Foundation, Inc.
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 3, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Under Section 7 of GPL version 3, you are granted additional
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// permissions described in the GCC Runtime Library Exception, version
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// 3.1, as published by the Free Software Foundation.
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// You should have received a copy of the GNU General Public License and
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// a copy of the GCC Runtime Library Exception along with this program;
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// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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// <http://www.gnu.org/licenses/>.
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/** @file bits/unique_ptr.h
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* This is an internal header file, included by other library headers.
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* Do not attempt to use it directly. @headername{memory}
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*/
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#ifndef _UNIQUE_PTR_H
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#define _UNIQUE_PTR_H 1
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#include <bits/c++config.h>
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#include <debug/debug.h>
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#include <type_traits>
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#include <utility>
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#include <tuple>
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namespace std _GLIBCXX_VISIBILITY(default)
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{
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_GLIBCXX_BEGIN_NAMESPACE_VERSION
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/**
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* @addtogroup pointer_abstractions
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* @{
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*/
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#if _GLIBCXX_USE_DEPRECATED
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template<typename> class auto_ptr;
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#endif
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/// Primary template of default_delete, used by unique_ptr
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template<typename _Tp>
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struct default_delete
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{
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/// Default constructor
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constexpr default_delete() noexcept = default;
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/** @brief Converting constructor.
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*
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* Allows conversion from a deleter for arrays of another type, @p _Up,
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* only if @p _Up* is convertible to @p _Tp*.
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*/
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template<typename _Up, typename = typename
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enable_if<is_convertible<_Up*, _Tp*>::value>::type>
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default_delete(const default_delete<_Up>&) noexcept { }
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/// Calls @c delete @p __ptr
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void
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operator()(_Tp* __ptr) const
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{
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static_assert(!is_void<_Tp>::value,
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"can't delete pointer to incomplete type");
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static_assert(sizeof(_Tp)>0,
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"can't delete pointer to incomplete type");
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delete __ptr;
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}
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};
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// DR 740 - omit specialization for array objects with a compile time length
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/// Specialization for arrays, default_delete.
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template<typename _Tp>
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struct default_delete<_Tp[]>
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{
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private:
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template<typename _Up>
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using __remove_cv = typename remove_cv<_Up>::type;
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// Like is_base_of<_Tp, _Up> but false if unqualified types are the same
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template<typename _Up>
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using __is_derived_Tp
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= __and_< is_base_of<_Tp, _Up>,
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__not_<is_same<__remove_cv<_Tp>, __remove_cv<_Up>>> >;
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public:
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/// Default constructor
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constexpr default_delete() noexcept = default;
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/** @brief Converting constructor.
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*
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* Allows conversion from a deleter for arrays of another type, such as
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* a const-qualified version of @p _Tp.
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*
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* Conversions from types derived from @c _Tp are not allowed because
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* it is unsafe to @c delete[] an array of derived types through a
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* pointer to the base type.
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*/
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template<typename _Up, typename = typename
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enable_if<!__is_derived_Tp<_Up>::value>::type>
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default_delete(const default_delete<_Up[]>&) noexcept { }
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/// Calls @c delete[] @p __ptr
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void
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operator()(_Tp* __ptr) const
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{
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static_assert(sizeof(_Tp)>0,
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"can't delete pointer to incomplete type");
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delete [] __ptr;
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}
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template<typename _Up>
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typename enable_if<__is_derived_Tp<_Up>::value>::type
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operator()(_Up*) const = delete;
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};
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/// 20.7.1.2 unique_ptr for single objects.
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template <typename _Tp, typename _Dp = default_delete<_Tp> >
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class unique_ptr
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{
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// use SFINAE to determine whether _Del::pointer exists
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class _Pointer
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{
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template<typename _Up>
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static typename _Up::pointer __test(typename _Up::pointer*);
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template<typename _Up>
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static _Tp* __test(...);
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typedef typename remove_reference<_Dp>::type _Del;
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public:
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typedef decltype(__test<_Del>(0)) type;
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};
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typedef std::tuple<typename _Pointer::type, _Dp> __tuple_type;
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__tuple_type _M_t;
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public:
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typedef typename _Pointer::type pointer;
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typedef _Tp element_type;
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typedef _Dp deleter_type;
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// Constructors.
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/// Default constructor, creates a unique_ptr that owns nothing.
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constexpr unique_ptr() noexcept
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: _M_t()
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{ static_assert(!is_pointer<deleter_type>::value,
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"constructed with null function pointer deleter"); }
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/** Takes ownership of a pointer.
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*
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* @param __p A pointer to an object of @c element_type
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*
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* The deleter will be value-initialized.
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*/
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explicit
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unique_ptr(pointer __p) noexcept
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: _M_t(__p, deleter_type())
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{ static_assert(!is_pointer<deleter_type>::value,
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"constructed with null function pointer deleter"); }
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/** Takes ownership of a pointer.
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*
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* @param __p A pointer to an object of @c element_type
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* @param __d A reference to a deleter.
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*
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* The deleter will be initialized with @p __d
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*/
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unique_ptr(pointer __p,
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typename conditional<is_reference<deleter_type>::value,
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deleter_type, const deleter_type&>::type __d) noexcept
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: _M_t(__p, __d) { }
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/** Takes ownership of a pointer.
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*
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* @param __p A pointer to an object of @c element_type
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* @param __d An rvalue reference to a deleter.
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*
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* The deleter will be initialized with @p std::move(__d)
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*/
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unique_ptr(pointer __p,
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typename remove_reference<deleter_type>::type&& __d) noexcept
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: _M_t(std::move(__p), std::move(__d))
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{ static_assert(!std::is_reference<deleter_type>::value,
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"rvalue deleter bound to reference"); }
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/// Creates a unique_ptr that owns nothing.
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constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }
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// Move constructors.
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/// Move constructor.
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unique_ptr(unique_ptr&& __u) noexcept
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: _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) { }
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/** @brief Converting constructor from another type
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*
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* Requires that the pointer owned by @p __u is convertible to the
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* type of pointer owned by this object, @p __u does not own an array,
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* and @p __u has a compatible deleter type.
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*/
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template<typename _Up, typename _Ep, typename = _Require<
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is_convertible<typename unique_ptr<_Up, _Ep>::pointer, pointer>,
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__not_<is_array<_Up>>,
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typename conditional<is_reference<_Dp>::value,
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is_same<_Ep, _Dp>,
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is_convertible<_Ep, _Dp>>::type>>
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unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept
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: _M_t(__u.release(), std::forward<_Ep>(__u.get_deleter()))
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{ }
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#if _GLIBCXX_USE_DEPRECATED
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/// Converting constructor from @c auto_ptr
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template<typename _Up, typename = _Require<
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is_convertible<_Up*, _Tp*>, is_same<_Dp, default_delete<_Tp>>>>
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unique_ptr(auto_ptr<_Up>&& __u) noexcept;
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#endif
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/// Destructor, invokes the deleter if the stored pointer is not null.
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~unique_ptr() noexcept
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{
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auto& __ptr = std::get<0>(_M_t);
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if (__ptr != nullptr)
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get_deleter()(__ptr);
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__ptr = pointer();
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}
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// Assignment.
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/** @brief Move assignment operator.
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*
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* @param __u The object to transfer ownership from.
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*
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* Invokes the deleter first if this object owns a pointer.
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*/
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unique_ptr&
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operator=(unique_ptr&& __u) noexcept
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{
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reset(__u.release());
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get_deleter() = std::forward<deleter_type>(__u.get_deleter());
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return *this;
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}
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/** @brief Assignment from another type.
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*
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* @param __u The object to transfer ownership from, which owns a
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* convertible pointer to a non-array object.
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*
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* Invokes the deleter first if this object owns a pointer.
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*/
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template<typename _Up, typename _Ep>
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typename enable_if< __and_<
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is_convertible<typename unique_ptr<_Up, _Ep>::pointer, pointer>,
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__not_<is_array<_Up>>
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>::value,
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unique_ptr&>::type
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operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
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{
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reset(__u.release());
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get_deleter() = std::forward<_Ep>(__u.get_deleter());
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return *this;
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}
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/// Reset the %unique_ptr to empty, invoking the deleter if necessary.
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unique_ptr&
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operator=(nullptr_t) noexcept
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{
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reset();
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return *this;
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}
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// Observers.
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/// Dereference the stored pointer.
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typename add_lvalue_reference<element_type>::type
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operator*() const
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{
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_GLIBCXX_DEBUG_ASSERT(get() != pointer());
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return *get();
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}
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/// Return the stored pointer.
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pointer
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operator->() const noexcept
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{
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_GLIBCXX_DEBUG_ASSERT(get() != pointer());
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return get();
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}
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/// Return the stored pointer.
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pointer
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get() const noexcept
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{ return std::get<0>(_M_t); }
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/// Return a reference to the stored deleter.
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deleter_type&
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get_deleter() noexcept
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{ return std::get<1>(_M_t); }
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/// Return a reference to the stored deleter.
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const deleter_type&
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get_deleter() const noexcept
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{ return std::get<1>(_M_t); }
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/// Return @c true if the stored pointer is not null.
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explicit operator bool() const noexcept
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{ return get() == pointer() ? false : true; }
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// Modifiers.
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/// Release ownership of any stored pointer.
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pointer
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release() noexcept
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{
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pointer __p = get();
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std::get<0>(_M_t) = pointer();
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return __p;
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}
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/** @brief Replace the stored pointer.
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*
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* @param __p The new pointer to store.
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*
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* The deleter will be invoked if a pointer is already owned.
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*/
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void
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reset(pointer __p = pointer()) noexcept
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{
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using std::swap;
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swap(std::get<0>(_M_t), __p);
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if (__p != pointer())
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get_deleter()(__p);
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}
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/// Exchange the pointer and deleter with another object.
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void
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swap(unique_ptr& __u) noexcept
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{
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using std::swap;
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swap(_M_t, __u._M_t);
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}
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// Disable copy from lvalue.
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unique_ptr(const unique_ptr&) = delete;
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unique_ptr& operator=(const unique_ptr&) = delete;
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};
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/// 20.7.1.3 unique_ptr for array objects with a runtime length
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// [unique.ptr.runtime]
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// _GLIBCXX_RESOLVE_LIB_DEFECTS
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// DR 740 - omit specialization for array objects with a compile time length
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template<typename _Tp, typename _Dp>
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class unique_ptr<_Tp[], _Dp>
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{
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// use SFINAE to determine whether _Del::pointer exists
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class _Pointer
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{
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template<typename _Up>
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static typename _Up::pointer __test(typename _Up::pointer*);
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template<typename _Up>
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static _Tp* __test(...);
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typedef typename remove_reference<_Dp>::type _Del;
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public:
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typedef decltype(__test<_Del>(0)) type;
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};
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typedef std::tuple<typename _Pointer::type, _Dp> __tuple_type;
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__tuple_type _M_t;
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template<typename _Up>
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using __remove_cv = typename remove_cv<_Up>::type;
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// like is_base_of<_Tp, _Up> but false if unqualified types are the same
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template<typename _Up>
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using __is_derived_Tp
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= __and_< is_base_of<_Tp, _Up>,
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__not_<is_same<__remove_cv<_Tp>, __remove_cv<_Up>>> >;
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template<typename _Up, typename _Ep,
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typename _Tp_pointer = typename _Pointer::type,
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typename _Up_pointer = typename unique_ptr<_Up, _Ep>::pointer>
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using __safe_conversion = __and_<
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is_convertible<_Up_pointer, _Tp_pointer>,
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is_array<_Up>,
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__or_<__not_<is_pointer<_Up_pointer>>,
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__not_<is_pointer<_Tp_pointer>>,
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__not_<__is_derived_Tp<typename remove_extent<_Up>::type>>
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>
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>;
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public:
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typedef typename _Pointer::type pointer;
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typedef _Tp element_type;
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typedef _Dp deleter_type;
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// Constructors.
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/// Default constructor, creates a unique_ptr that owns nothing.
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constexpr unique_ptr() noexcept
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: _M_t()
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{ static_assert(!std::is_pointer<deleter_type>::value,
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"constructed with null function pointer deleter"); }
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/** Takes ownership of a pointer.
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*
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* @param __p A pointer to an array of @c element_type
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*
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* The deleter will be value-initialized.
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*/
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explicit
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unique_ptr(pointer __p) noexcept
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: _M_t(__p, deleter_type())
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{ static_assert(!is_pointer<deleter_type>::value,
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"constructed with null function pointer deleter"); }
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// Disable construction from convertible pointer types.
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template<typename _Up, typename = _Require<is_pointer<pointer>,
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is_convertible<_Up*, pointer>, __is_derived_Tp<_Up>>>
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explicit
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unique_ptr(_Up* __p) = delete;
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/** Takes ownership of a pointer.
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*
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* @param __p A pointer to an array of @c element_type
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* @param __d A reference to a deleter.
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*
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* The deleter will be initialized with @p __d
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*/
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unique_ptr(pointer __p,
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typename conditional<is_reference<deleter_type>::value,
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deleter_type, const deleter_type&>::type __d) noexcept
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: _M_t(__p, __d) { }
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/** Takes ownership of a pointer.
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*
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* @param __p A pointer to an array of @c element_type
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* @param __d A reference to a deleter.
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*
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* The deleter will be initialized with @p std::move(__d)
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*/
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unique_ptr(pointer __p, typename
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remove_reference<deleter_type>::type&& __d) noexcept
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: _M_t(std::move(__p), std::move(__d))
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{ static_assert(!is_reference<deleter_type>::value,
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"rvalue deleter bound to reference"); }
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/// Move constructor.
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unique_ptr(unique_ptr&& __u) noexcept
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: _M_t(__u.release(), std::forward<deleter_type>(__u.get_deleter())) { }
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/// Creates a unique_ptr that owns nothing.
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constexpr unique_ptr(nullptr_t) noexcept : unique_ptr() { }
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template<typename _Up, typename _Ep,
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typename = _Require<__safe_conversion<_Up, _Ep>,
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typename conditional<is_reference<_Dp>::value,
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is_same<_Ep, _Dp>,
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is_convertible<_Ep, _Dp>>::type
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>>
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unique_ptr(unique_ptr<_Up, _Ep>&& __u) noexcept
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: _M_t(__u.release(), std::forward<_Ep>(__u.get_deleter()))
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{ }
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/// Destructor, invokes the deleter if the stored pointer is not null.
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~unique_ptr()
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{
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auto& __ptr = std::get<0>(_M_t);
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if (__ptr != nullptr)
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get_deleter()(__ptr);
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__ptr = pointer();
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}
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// Assignment.
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/** @brief Move assignment operator.
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*
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* @param __u The object to transfer ownership from.
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*
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* Invokes the deleter first if this object owns a pointer.
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*/
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unique_ptr&
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operator=(unique_ptr&& __u) noexcept
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{
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reset(__u.release());
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get_deleter() = std::forward<deleter_type>(__u.get_deleter());
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return *this;
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}
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/** @brief Assignment from another type.
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*
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* @param __u The object to transfer ownership from, which owns a
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* convertible pointer to an array object.
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*
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* Invokes the deleter first if this object owns a pointer.
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*/
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template<typename _Up, typename _Ep>
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typename
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enable_if<__safe_conversion<_Up, _Ep>::value, unique_ptr&>::type
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operator=(unique_ptr<_Up, _Ep>&& __u) noexcept
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{
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reset(__u.release());
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get_deleter() = std::forward<_Ep>(__u.get_deleter());
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return *this;
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}
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/// Reset the %unique_ptr to empty, invoking the deleter if necessary.
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unique_ptr&
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operator=(nullptr_t) noexcept
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{
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reset();
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return *this;
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}
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// Observers.
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/// Access an element of owned array.
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typename std::add_lvalue_reference<element_type>::type
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operator[](size_t __i) const
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{
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_GLIBCXX_DEBUG_ASSERT(get() != pointer());
|
|
return get()[__i];
|
|
}
|
|
|
|
/// Return the stored pointer.
|
|
pointer
|
|
get() const noexcept
|
|
{ return std::get<0>(_M_t); }
|
|
|
|
/// Return a reference to the stored deleter.
|
|
deleter_type&
|
|
get_deleter() noexcept
|
|
{ return std::get<1>(_M_t); }
|
|
|
|
/// Return a reference to the stored deleter.
|
|
const deleter_type&
|
|
get_deleter() const noexcept
|
|
{ return std::get<1>(_M_t); }
|
|
|
|
/// Return @c true if the stored pointer is not null.
|
|
explicit operator bool() const noexcept
|
|
{ return get() == pointer() ? false : true; }
|
|
|
|
// Modifiers.
|
|
|
|
/// Release ownership of any stored pointer.
|
|
pointer
|
|
release() noexcept
|
|
{
|
|
pointer __p = get();
|
|
std::get<0>(_M_t) = pointer();
|
|
return __p;
|
|
}
|
|
|
|
/** @brief Replace the stored pointer.
|
|
*
|
|
* @param __p The new pointer to store.
|
|
*
|
|
* The deleter will be invoked if a pointer is already owned.
|
|
*/
|
|
void
|
|
reset(pointer __p = pointer()) noexcept
|
|
{
|
|
using std::swap;
|
|
swap(std::get<0>(_M_t), __p);
|
|
if (__p != nullptr)
|
|
get_deleter()(__p);
|
|
}
|
|
|
|
// Disable resetting from convertible pointer types.
|
|
template<typename _Up, typename = _Require<is_pointer<pointer>,
|
|
is_convertible<_Up*, pointer>, __is_derived_Tp<_Up>>>
|
|
void reset(_Up*) = delete;
|
|
|
|
/// Exchange the pointer and deleter with another object.
|
|
void
|
|
swap(unique_ptr& __u) noexcept
|
|
{
|
|
using std::swap;
|
|
swap(_M_t, __u._M_t);
|
|
}
|
|
|
|
// Disable copy from lvalue.
|
|
unique_ptr(const unique_ptr&) = delete;
|
|
unique_ptr& operator=(const unique_ptr&) = delete;
|
|
|
|
// Disable construction from convertible pointer types.
|
|
template<typename _Up, typename = _Require<is_pointer<pointer>,
|
|
is_convertible<_Up*, pointer>, __is_derived_Tp<_Up>>>
|
|
unique_ptr(_Up*, typename
|
|
conditional<is_reference<deleter_type>::value,
|
|
deleter_type, const deleter_type&>::type) = delete;
|
|
|
|
// Disable construction from convertible pointer types.
|
|
template<typename _Up, typename = _Require<is_pointer<pointer>,
|
|
is_convertible<_Up*, pointer>, __is_derived_Tp<_Up>>>
|
|
unique_ptr(_Up*, typename
|
|
remove_reference<deleter_type>::type&&) = delete;
|
|
};
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline void
|
|
swap(unique_ptr<_Tp, _Dp>& __x,
|
|
unique_ptr<_Tp, _Dp>& __y) noexcept
|
|
{ __x.swap(__y); }
|
|
|
|
template<typename _Tp, typename _Dp,
|
|
typename _Up, typename _Ep>
|
|
inline bool
|
|
operator==(const unique_ptr<_Tp, _Dp>& __x,
|
|
const unique_ptr<_Up, _Ep>& __y)
|
|
{ return __x.get() == __y.get(); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator==(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept
|
|
{ return !__x; }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator==(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept
|
|
{ return !__x; }
|
|
|
|
template<typename _Tp, typename _Dp,
|
|
typename _Up, typename _Ep>
|
|
inline bool
|
|
operator!=(const unique_ptr<_Tp, _Dp>& __x,
|
|
const unique_ptr<_Up, _Ep>& __y)
|
|
{ return __x.get() != __y.get(); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator!=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t) noexcept
|
|
{ return (bool)__x; }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator!=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x) noexcept
|
|
{ return (bool)__x; }
|
|
|
|
template<typename _Tp, typename _Dp,
|
|
typename _Up, typename _Ep>
|
|
inline bool
|
|
operator<(const unique_ptr<_Tp, _Dp>& __x,
|
|
const unique_ptr<_Up, _Ep>& __y)
|
|
{
|
|
typedef typename
|
|
std::common_type<typename unique_ptr<_Tp, _Dp>::pointer,
|
|
typename unique_ptr<_Up, _Ep>::pointer>::type _CT;
|
|
return std::less<_CT>()(__x.get(), __y.get());
|
|
}
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator<(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
|
|
{ return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(__x.get(),
|
|
nullptr); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator<(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
|
|
{ return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(nullptr,
|
|
__x.get()); }
|
|
|
|
template<typename _Tp, typename _Dp,
|
|
typename _Up, typename _Ep>
|
|
inline bool
|
|
operator<=(const unique_ptr<_Tp, _Dp>& __x,
|
|
const unique_ptr<_Up, _Ep>& __y)
|
|
{ return !(__y < __x); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator<=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
|
|
{ return !(nullptr < __x); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator<=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
|
|
{ return !(__x < nullptr); }
|
|
|
|
template<typename _Tp, typename _Dp,
|
|
typename _Up, typename _Ep>
|
|
inline bool
|
|
operator>(const unique_ptr<_Tp, _Dp>& __x,
|
|
const unique_ptr<_Up, _Ep>& __y)
|
|
{ return (__y < __x); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator>(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
|
|
{ return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(nullptr,
|
|
__x.get()); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator>(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
|
|
{ return std::less<typename unique_ptr<_Tp, _Dp>::pointer>()(__x.get(),
|
|
nullptr); }
|
|
|
|
template<typename _Tp, typename _Dp,
|
|
typename _Up, typename _Ep>
|
|
inline bool
|
|
operator>=(const unique_ptr<_Tp, _Dp>& __x,
|
|
const unique_ptr<_Up, _Ep>& __y)
|
|
{ return !(__x < __y); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator>=(const unique_ptr<_Tp, _Dp>& __x, nullptr_t)
|
|
{ return !(__x < nullptr); }
|
|
|
|
template<typename _Tp, typename _Dp>
|
|
inline bool
|
|
operator>=(nullptr_t, const unique_ptr<_Tp, _Dp>& __x)
|
|
{ return !(nullptr < __x); }
|
|
|
|
/// std::hash specialization for unique_ptr.
|
|
template<typename _Tp, typename _Dp>
|
|
struct hash<unique_ptr<_Tp, _Dp>>
|
|
: public __hash_base<size_t, unique_ptr<_Tp, _Dp>>
|
|
{
|
|
size_t
|
|
operator()(const unique_ptr<_Tp, _Dp>& __u) const noexcept
|
|
{
|
|
typedef unique_ptr<_Tp, _Dp> _UP;
|
|
return std::hash<typename _UP::pointer>()(__u.get());
|
|
}
|
|
};
|
|
|
|
#if __cplusplus > 201103L
|
|
|
|
#define __cpp_lib_make_unique 201304
|
|
|
|
template<typename _Tp>
|
|
struct _MakeUniq
|
|
{ typedef unique_ptr<_Tp> __single_object; };
|
|
|
|
template<typename _Tp>
|
|
struct _MakeUniq<_Tp[]>
|
|
{ typedef unique_ptr<_Tp[]> __array; };
|
|
|
|
template<typename _Tp, size_t _Bound>
|
|
struct _MakeUniq<_Tp[_Bound]>
|
|
{ struct __invalid_type { }; };
|
|
|
|
/// std::make_unique for single objects
|
|
template<typename _Tp, typename... _Args>
|
|
inline typename _MakeUniq<_Tp>::__single_object
|
|
make_unique(_Args&&... __args)
|
|
{ return unique_ptr<_Tp>(new _Tp(std::forward<_Args>(__args)...)); }
|
|
|
|
/// std::make_unique for arrays of unknown bound
|
|
template<typename _Tp>
|
|
inline typename _MakeUniq<_Tp>::__array
|
|
make_unique(size_t __num)
|
|
{ return unique_ptr<_Tp>(new remove_extent_t<_Tp>[__num]()); }
|
|
|
|
/// Disable std::make_unique for arrays of known bound
|
|
template<typename _Tp, typename... _Args>
|
|
inline typename _MakeUniq<_Tp>::__invalid_type
|
|
make_unique(_Args&&...) = delete;
|
|
#endif
|
|
|
|
// @} group pointer_abstractions
|
|
|
|
_GLIBCXX_END_NAMESPACE_VERSION
|
|
} // namespace
|
|
|
|
#endif /* _UNIQUE_PTR_H */
|