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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___MEMORY_DESTRUCT_N_H10#define _LIBCPP___MEMORY_DESTRUCT_N_H11 12#include <__config>13#include <__cstddef/size_t.h>14#include <__type_traits/integral_constant.h>15#include <__type_traits/is_trivially_destructible.h>16 17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)18# pragma GCC system_header19#endif20 21_LIBCPP_BEGIN_NAMESPACE_STD22 23struct __destruct_n {24private:25 size_t __size_;26 27 template <class _Tp>28 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __process(_Tp* __p, false_type) _NOEXCEPT {29 for (size_t __i = 0; __i < __size_; ++__i, ++__p)30 __p->~_Tp();31 }32 33 template <class _Tp>34 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __process(_Tp*, true_type) _NOEXCEPT {}35 36 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __incr(false_type) _NOEXCEPT { ++__size_; }37 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __incr(true_type) _NOEXCEPT {}38 39 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __set(size_t __s, false_type) _NOEXCEPT { __size_ = __s; }40 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __set(size_t, true_type) _NOEXCEPT {}41 42public:43 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 explicit __destruct_n(size_t __s) _NOEXCEPT : __size_(__s) {}44 45 template <class _Tp>46 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __incr() _NOEXCEPT {47 __incr(integral_constant<bool, is_trivially_destructible<_Tp>::value>());48 }49 50 template <class _Tp>51 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void __set(size_t __s, _Tp*) _NOEXCEPT {52 __set(__s, integral_constant<bool, is_trivially_destructible<_Tp>::value>());53 }54 55 template <class _Tp>56 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 void operator()(_Tp* __p) _NOEXCEPT {57 __process(__p, integral_constant<bool, is_trivially_destructible<_Tp>::value>());58 }59};60 61_LIBCPP_END_NAMESPACE_STD62 63#endif // _LIBCPP___MEMORY_DESTRUCT_N_H64