beecf2c605
We were not declaring `__uses_allocator_construction_args` helper functions, leading to several valid uses failing to compile. This patch solves the problem by moving these helper functions into a struct, which also reduces the amount of redundant SFINAE we need to perform since most overloads are checking for a cv-qualfied pair. Fixes #66714 Co-authored-by: Louis Dionne <ldionne.2@gmail.com>
241 lines
9.9 KiB
C++
241 lines
9.9 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
|
|
// See https://llvm.org/LICENSE.txt for license information.
|
|
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#ifndef _LIBCPP___MEMORY_USES_ALLOCATOR_CONSTRUCTION_H
|
|
#define _LIBCPP___MEMORY_USES_ALLOCATOR_CONSTRUCTION_H
|
|
|
|
#include <__config>
|
|
#include <__memory/construct_at.h>
|
|
#include <__memory/uses_allocator.h>
|
|
#include <__tuple/tuple_like_no_subrange.h>
|
|
#include <__type_traits/enable_if.h>
|
|
#include <__type_traits/is_same.h>
|
|
#include <__type_traits/remove_cv.h>
|
|
#include <__utility/declval.h>
|
|
#include <__utility/pair.h>
|
|
#include <tuple>
|
|
|
|
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
|
|
# pragma GCC system_header
|
|
#endif
|
|
|
|
_LIBCPP_PUSH_MACROS
|
|
#include <__undef_macros>
|
|
|
|
_LIBCPP_BEGIN_NAMESPACE_STD
|
|
|
|
#if _LIBCPP_STD_VER >= 17
|
|
|
|
template <class _Type>
|
|
inline constexpr bool __is_std_pair = false;
|
|
|
|
template <class _Type1, class _Type2>
|
|
inline constexpr bool __is_std_pair<pair<_Type1, _Type2>> = true;
|
|
|
|
template <class _Tp>
|
|
inline constexpr bool __is_cv_std_pair = __is_std_pair<remove_cv_t<_Tp>>;
|
|
|
|
template <class _Tp, class = void>
|
|
struct __uses_allocator_construction_args;
|
|
|
|
namespace __uses_allocator_detail {
|
|
|
|
template <class _Ap, class _Bp>
|
|
void __fun(const pair<_Ap, _Bp>&);
|
|
|
|
template <class _Tp>
|
|
decltype(__uses_allocator_detail::__fun(std::declval<_Tp>()), true_type()) __convertible_to_const_pair_ref_impl(int);
|
|
|
|
template <class>
|
|
false_type __convertible_to_const_pair_ref_impl(...);
|
|
|
|
template <class _Tp>
|
|
inline constexpr bool __convertible_to_const_pair_ref =
|
|
decltype(__uses_allocator_detail::__convertible_to_const_pair_ref_impl<_Tp>(0))::value;
|
|
|
|
# if _LIBCPP_STD_VER >= 23
|
|
template <class _Tp, class _Up>
|
|
inline constexpr bool __uses_allocator_constraints =
|
|
__is_cv_std_pair<_Tp> && !__pair_like_no_subrange<_Up> && !__convertible_to_const_pair_ref<_Up>;
|
|
# else
|
|
template <class _Tp, class _Up>
|
|
inline constexpr bool __uses_allocator_constraints = __is_cv_std_pair<_Tp> && !__convertible_to_const_pair_ref<_Up>;
|
|
# endif
|
|
|
|
} // namespace __uses_allocator_detail
|
|
|
|
template <class _Type, class _Alloc, class... _Args>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _Type __make_obj_using_allocator(const _Alloc& __alloc, _Args&&... __args);
|
|
|
|
template <class _Pair>
|
|
struct __uses_allocator_construction_args<_Pair, __enable_if_t<__is_cv_std_pair<_Pair>>> {
|
|
template <class _Alloc, class _Tuple1, class _Tuple2>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto
|
|
__apply(const _Alloc& __alloc, piecewise_construct_t, _Tuple1&& __x, _Tuple2&& __y) noexcept {
|
|
return std::make_tuple(
|
|
piecewise_construct,
|
|
std::apply(
|
|
[&__alloc](auto&&... __args1) {
|
|
return __uses_allocator_construction_args<typename _Pair::first_type>::__apply(
|
|
__alloc, std::forward<decltype(__args1)>(__args1)...);
|
|
},
|
|
std::forward<_Tuple1>(__x)),
|
|
std::apply(
|
|
[&__alloc](auto&&... __args2) {
|
|
return __uses_allocator_construction_args<typename _Pair::second_type>::__apply(
|
|
__alloc, std::forward<decltype(__args2)>(__args2)...);
|
|
},
|
|
std::forward<_Tuple2>(__y)));
|
|
}
|
|
|
|
template <class _Alloc>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc) noexcept {
|
|
return __uses_allocator_construction_args<_Pair>::__apply(__alloc, piecewise_construct, tuple<>{}, tuple<>{});
|
|
}
|
|
|
|
template <class _Alloc, class _Up, class _Vp>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, _Up&& __u, _Vp&& __v) noexcept {
|
|
return __uses_allocator_construction_args<_Pair>::__apply(
|
|
__alloc,
|
|
piecewise_construct,
|
|
std::forward_as_tuple(std::forward<_Up>(__u)),
|
|
std::forward_as_tuple(std::forward<_Vp>(__v)));
|
|
}
|
|
|
|
# if _LIBCPP_STD_VER >= 23
|
|
template <class _Alloc, class _Up, class _Vp>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, pair<_Up, _Vp>& __pair) noexcept {
|
|
return __uses_allocator_construction_args<_Pair>::__apply(
|
|
__alloc, piecewise_construct, std::forward_as_tuple(__pair.first), std::forward_as_tuple(__pair.second));
|
|
}
|
|
# endif
|
|
|
|
template <class _Alloc, class _Up, class _Vp>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, const pair<_Up, _Vp>& __pair) noexcept {
|
|
return __uses_allocator_construction_args<_Pair>::__apply(
|
|
__alloc, piecewise_construct, std::forward_as_tuple(__pair.first), std::forward_as_tuple(__pair.second));
|
|
}
|
|
|
|
template <class _Alloc, class _Up, class _Vp>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, pair<_Up, _Vp>&& __pair) noexcept {
|
|
return __uses_allocator_construction_args<_Pair>::__apply(
|
|
__alloc,
|
|
piecewise_construct,
|
|
std::forward_as_tuple(std::get<0>(std::move(__pair))),
|
|
std::forward_as_tuple(std::get<1>(std::move(__pair))));
|
|
}
|
|
|
|
# if _LIBCPP_STD_VER >= 23
|
|
template <class _Alloc, class _Up, class _Vp>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, const pair<_Up, _Vp>&& __pair) noexcept {
|
|
return __uses_allocator_construction_args<_Pair>::__apply(
|
|
__alloc,
|
|
piecewise_construct,
|
|
std::forward_as_tuple(std::get<0>(std::move(__pair))),
|
|
std::forward_as_tuple(std::get<1>(std::move(__pair))));
|
|
}
|
|
|
|
template < class _Alloc, __pair_like_no_subrange _PairLike>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, _PairLike&& __p) noexcept {
|
|
return __uses_allocator_construction_args<_Pair>::__apply(
|
|
__alloc,
|
|
piecewise_construct,
|
|
std::forward_as_tuple(std::get<0>(std::forward<_PairLike>(__p))),
|
|
std::forward_as_tuple(std::get<1>(std::forward<_PairLike>(__p))));
|
|
}
|
|
# endif
|
|
|
|
template <class _Alloc,
|
|
class _Type,
|
|
__enable_if_t<__uses_allocator_detail::__uses_allocator_constraints<_Pair, _Type>, int> = 0>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, _Type&& __value) noexcept {
|
|
struct __pair_constructor {
|
|
using _PairMutable = remove_cv_t<_Pair>;
|
|
|
|
_LIBCPP_HIDDEN constexpr auto __do_construct(const _PairMutable& __pair) const {
|
|
return std::__make_obj_using_allocator<_PairMutable>(__alloc_, __pair);
|
|
}
|
|
|
|
_LIBCPP_HIDDEN constexpr auto __do_construct(_PairMutable&& __pair) const {
|
|
return std::__make_obj_using_allocator<_PairMutable>(__alloc_, std::move(__pair));
|
|
}
|
|
|
|
const _Alloc& __alloc_;
|
|
_Type& __value_;
|
|
|
|
_LIBCPP_HIDDEN constexpr operator _PairMutable() const { return __do_construct(std::forward<_Type>(__value_)); }
|
|
};
|
|
|
|
return std::make_tuple(__pair_constructor{__alloc, __value});
|
|
}
|
|
};
|
|
|
|
template <class _Type>
|
|
struct __uses_allocator_construction_args<_Type, __enable_if_t<!__is_cv_std_pair<_Type>>> {
|
|
template <class _Alloc, class... _Args>
|
|
static _LIBCPP_HIDE_FROM_ABI constexpr auto __apply(const _Alloc& __alloc, _Args&&... __args) noexcept {
|
|
if constexpr (!uses_allocator_v<remove_cv_t<_Type>, _Alloc> && is_constructible_v<_Type, _Args...>) {
|
|
return std::forward_as_tuple(std::forward<_Args>(__args)...);
|
|
} else if constexpr (uses_allocator_v<remove_cv_t<_Type>, _Alloc> &&
|
|
is_constructible_v<_Type, allocator_arg_t, const _Alloc&, _Args...>) {
|
|
return tuple<allocator_arg_t, const _Alloc&, _Args&&...>(allocator_arg, __alloc, std::forward<_Args>(__args)...);
|
|
} else if constexpr (uses_allocator_v<remove_cv_t<_Type>, _Alloc> &&
|
|
is_constructible_v<_Type, _Args..., const _Alloc&>) {
|
|
return std::forward_as_tuple(std::forward<_Args>(__args)..., __alloc);
|
|
} else {
|
|
static_assert(
|
|
sizeof(_Type) + 1 == 0, "If uses_allocator_v<Type> is true, the type has to be allocator-constructible");
|
|
}
|
|
}
|
|
};
|
|
|
|
template <class _Type, class _Alloc, class... _Args>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _Type __make_obj_using_allocator(const _Alloc& __alloc, _Args&&... __args) {
|
|
return std::make_from_tuple<_Type>(
|
|
__uses_allocator_construction_args<_Type>::__apply(__alloc, std::forward<_Args>(__args)...));
|
|
}
|
|
|
|
template <class _Type, class _Alloc, class... _Args>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr _Type*
|
|
__uninitialized_construct_using_allocator(_Type* __ptr, const _Alloc& __alloc, _Args&&... __args) {
|
|
return std::apply(
|
|
[&__ptr](auto&&... __xs) { return std::__construct_at(__ptr, std::forward<decltype(__xs)>(__xs)...); },
|
|
__uses_allocator_construction_args<_Type>::__apply(__alloc, std::forward<_Args>(__args)...));
|
|
}
|
|
|
|
#endif // _LIBCPP_STD_VER >= 17
|
|
|
|
#if _LIBCPP_STD_VER >= 20
|
|
|
|
template <class _Type, class _Alloc, class... _Args>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr auto uses_allocator_construction_args(const _Alloc& __alloc, _Args&&... __args) noexcept
|
|
-> decltype(__uses_allocator_construction_args<_Type>::__apply(__alloc, std::forward<_Args>(__args)...)) {
|
|
return /*--*/ __uses_allocator_construction_args<_Type>::__apply(__alloc, std::forward<_Args>(__args)...);
|
|
}
|
|
|
|
template <class _Type, class _Alloc, class... _Args>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr auto make_obj_using_allocator(const _Alloc& __alloc, _Args&&... __args)
|
|
-> decltype(std::__make_obj_using_allocator<_Type>(__alloc, std::forward<_Args>(__args)...)) {
|
|
return /*--*/ std::__make_obj_using_allocator<_Type>(__alloc, std::forward<_Args>(__args)...);
|
|
}
|
|
|
|
template <class _Type, class _Alloc, class... _Args>
|
|
_LIBCPP_HIDE_FROM_ABI constexpr auto
|
|
uninitialized_construct_using_allocator(_Type* __ptr, const _Alloc& __alloc, _Args&&... __args)
|
|
-> decltype(std::__uninitialized_construct_using_allocator(__ptr, __alloc, std::forward<_Args>(__args)...)) {
|
|
return /*--*/ std::__uninitialized_construct_using_allocator(__ptr, __alloc, std::forward<_Args>(__args)...);
|
|
}
|
|
|
|
#endif // _LIBCPP_STD_VER >= 20
|
|
|
|
_LIBCPP_END_NAMESPACE_STD
|
|
|
|
_LIBCPP_POP_MACROS
|
|
|
|
#endif // _LIBCPP___MEMORY_USES_ALLOCATOR_CONSTRUCTION_H
|