libstdc++: std::allocator_traits< pmr::polymorphic_allocator< _Tp > (original) (raw)
#include <[memory_resource](a00143%5Fsource.html)>
| Public Types | |
|---|---|
| using | allocator_type = pmr::polymorphic_allocator< _Tp > |
| using | const_pointer = const _Tp * |
| using | const_void_pointer = const void * |
| using | difference_type = std::ptrdiff_t |
| using | is_always_equal = false_type |
| using | pointer = _Tp * |
| template<typename _Up > | |
| using | rebind_alloc = pmr::polymorphic_allocator< _Up > |
| template<typename _Up > | |
| using | rebind_traits = allocator_traits< pmr::polymorphic_allocator< _Up > > |
| using | size_type = std::size_t |
| using | value_type = _Tp |
| using | void_pointer = void * |
| Static Public Member Functions | |
|---|---|
| static pointer | allocate (allocator_type &__a, size_type __n) |
| static pointer | allocate (allocator_type &__a, size_type __n, const_void_pointer) |
| template<typename _Up , typename... _Args> | |
| static void | construct (allocator_type &__a, _Up *__p, _Args &&... __args) |
| static void | deallocate (allocator_type &__a, pointer __p, size_type __n) |
| template<typename _Up > | |
| static constexpr void | destroy (allocator_type &, _Up *__p) noexcept(is_nothrow_destructible< _Up >::value) |
| static constexpr size_type | max_size (const allocator_type &) noexcept |
| using | propagate_on_container_copy_assignment = false_type |
| using | propagate_on_container_move_assignment = false_type |
| using | propagate_on_container_swap = false_type |
| static allocator_type | select_on_container_copy_construction (const allocator_type &) noexcept |
template<typename _Tp>
struct std::allocator_traits< pmr::polymorphic_allocator< _Tp > >
Partial specialization for std::pmr::polymorphic_allocator
Since
C++17
Definition at line 395 of file memory_resource.h.
◆ allocator_type
◆ const_pointer
◆ const_void_pointer
◆ difference_type
◆ is_always_equal
Whether all instances of the allocator type compare equal.
Definition at line 435 of file memory_resource.h.
◆ pointer
◆ propagate_on_container_copy_assignment
A polymorphic_allocator does not propagate when a container is copied, moved, or swapped.
Definition at line 425 of file memory_resource.h.
◆ propagate_on_container_move_assignment
A polymorphic_allocator does not propagate when a container is copied, moved, or swapped.
Definition at line 426 of file memory_resource.h.
◆ propagate_on_container_swap
A polymorphic_allocator does not propagate when a container is copied, moved, or swapped.
Definition at line 427 of file memory_resource.h.
◆ rebind_alloc
template<typename _Tp >
template<typename _Up >
◆ rebind_traits
template<typename _Tp >
template<typename _Up >
◆ size_type
◆ value_type
◆ void_pointer
◆ allocate() [1/2]
Allocate memory.
Parameters
| __a | An allocator. |
|---|---|
| __n | The number of objects to allocate space for. |
Calls a.allocate(n).
Definition at line 451 of file memory_resource.h.
◆ allocate() [2/2]
Allocate memory.
Parameters
| __a | An allocator. |
|---|---|
| __n | The number of objects to allocate space for. |
Returns
Memory of suitable size and alignment for n objects of type value_type.
The third parameter is ignored..
Returns a.allocate(n).
Definition at line 466 of file memory_resource.h.
◆ construct()
template<typename _Tp >
template<typename _Up , typename... _Args>
Construct an object of type _Up
Parameters
| __a | An allocator. |
|---|---|
| __p | Pointer to memory of suitable size and alignment for an object of type _Up. |
| __args | Constructor arguments. |
Calls __a.construct(__p, std::forward<_Args>(__args)...) in C++11, C++14 and C++17. Changed in C++20 to call std::construct_at(__p, std::forward<_Args>(__args)...) instead.
Definition at line 494 of file memory_resource.h.
◆ deallocate()
Deallocate memory.
Parameters
| __a | An allocator. |
|---|---|
| __p | Pointer to the memory to deallocate. |
| __n | The number of objects space was allocated for. |
Calls a.deallocate(p, n).
Definition at line 478 of file memory_resource.h.
◆ destroy()
template<typename _Tp >
template<typename _Up >
Destroy an object of type _Up
Parameters
| __a | An allocator. |
|---|---|
| __p | Pointer to the object to destroy |
Calls p->_Up().
Definition at line 506 of file memory_resource.h.
◆ max_size()
The maximum supported allocation size.
Returns
numeric_limits<size_t>::max() / sizeof(value_type)
Definition at line 515 of file memory_resource.h.
◆ select_on_container_copy_construction()
A polymorphic_allocator does not propagate when a container is copied, moved, or swapped.
Definition at line 430 of file memory_resource.h.
The documentation for this struct was generated from the following file: