libstdc++
std::allocator_traits< allocator< _Tp > > Struct Template Reference

#include <memory>

Public Types

using allocator_type
 
using const_pointer
 
using const_void_pointer
 
using difference_type
 
using is_always_equal
 
using pointer
 
using propagate_on_container_copy_assignment
 
using propagate_on_container_move_assignment
 
using propagate_on_container_swap
 
template<typename _Up >
using rebind_alloc
 
template<typename _Up >
using rebind_traits
 
using size_type
 
using value_type
 
using void_pointer
 

Static Public Member Functions

static constexpr pointer allocate (allocator_type &__a, size_type __n)
 
static constexpr pointer allocate (allocator_type &__a, size_type __n, const_void_pointer __hint)
 
template<typename _Up , typename... _Args>
static constexpr void construct (allocator_type &__a, _Up *__p, _Args &&... __args) noexcept(__is_nothrow_new_constructible< _Up, _Args... >)
 
static constexpr void deallocate (allocator_type &__a, pointer __p, size_type __n)
 
template<typename _Up >
static constexpr void destroy (allocator_type &__a, _Up *__p) noexcept(is_nothrow_destructible< _Up >::value)
 
static constexpr size_type max_size (const allocator_type &__a) noexcept
 
static constexpr allocator_type select_on_container_copy_construction (const allocator_type &__rhs)
 

Detailed Description

template<typename _Tp>
struct std::allocator_traits< allocator< _Tp > >

Partial specialization for std::allocator

Since
C++11
See also
std::allocator_traits

Definition at line 461 of file bits/alloc_traits.h.

Member Typedef Documentation

◆ allocator_type

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::allocator_type

The allocator type.

Definition at line 464 of file bits/alloc_traits.h.

◆ const_pointer

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::const_pointer

The allocator's const pointer type.

Definition at line 473 of file bits/alloc_traits.h.

◆ const_void_pointer

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::const_void_pointer

The allocator's const void pointer type.

Definition at line 479 of file bits/alloc_traits.h.

◆ difference_type

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::difference_type

The allocator's difference type.

Definition at line 482 of file bits/alloc_traits.h.

◆ is_always_equal

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::is_always_equal

Whether all instances of the allocator type compare equal.

Definition at line 497 of file bits/alloc_traits.h.

◆ pointer

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::pointer

The allocator's pointer type.

Definition at line 470 of file bits/alloc_traits.h.

◆ propagate_on_container_copy_assignment

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::propagate_on_container_copy_assignment

How the allocator is propagated on copy assignment.

Definition at line 488 of file bits/alloc_traits.h.

◆ propagate_on_container_move_assignment

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::propagate_on_container_move_assignment

How the allocator is propagated on move assignment.

Definition at line 491 of file bits/alloc_traits.h.

◆ propagate_on_container_swap

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::propagate_on_container_swap

How the allocator is propagated on swap.

Definition at line 494 of file bits/alloc_traits.h.

◆ rebind_alloc

template<typename _Tp >
template<typename _Up >
using std::allocator_traits< allocator< _Tp > >::rebind_alloc

Definition at line 500 of file bits/alloc_traits.h.

◆ rebind_traits

template<typename _Tp >
template<typename _Up >
using std::allocator_traits< allocator< _Tp > >::rebind_traits

Definition at line 503 of file bits/alloc_traits.h.

◆ size_type

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::size_type

The allocator's size type.

Definition at line 485 of file bits/alloc_traits.h.

◆ value_type

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::value_type

The allocated type.

Definition at line 467 of file bits/alloc_traits.h.

◆ void_pointer

template<typename _Tp >
using std::allocator_traits< allocator< _Tp > >::void_pointer

The allocator's void pointer type.

Definition at line 476 of file bits/alloc_traits.h.

Member Function Documentation

◆ allocate() [1/2]

template<typename _Tp >
static constexpr pointer std::allocator_traits< allocator< _Tp > >::allocate ( allocator_type & __a,
size_type __n )
inlinestaticconstexpr

Allocate memory.

Parameters
__aAn allocator.
__nThe number of objects to allocate space for.

Calls a.allocate(n)

Definition at line 514 of file bits/alloc_traits.h.

◆ allocate() [2/2]

template<typename _Tp >
static constexpr pointer std::allocator_traits< allocator< _Tp > >::allocate ( allocator_type & __a,
size_type __n,
const_void_pointer __hint )
inlinestaticconstexpr

Allocate memory.

Parameters
__aAn allocator.
__nThe number of objects to allocate space for.
__hintAid to locality.
Returns
Memory of suitable size and alignment for n objects of type value_type

Returns a.allocate(n, hint)

Definition at line 529 of file bits/alloc_traits.h.

◆ construct()

template<typename _Tp >
template<typename _Up , typename... _Args>
static constexpr void std::allocator_traits< allocator< _Tp > >::construct ( allocator_type & __a,
_Up * __p,
_Args &&... __args )
inlinestaticconstexprnoexcept

Construct an object of type _Up

Parameters
__aAn allocator.
__pPointer to memory of suitable size and alignment for an object of type _Up.
__argsConstructor 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 566 of file bits/alloc_traits.h.

References std::_Construct(), and std::forward().

◆ deallocate()

template<typename _Tp >
static constexpr void std::allocator_traits< allocator< _Tp > >::deallocate ( allocator_type & __a,
pointer __p,
size_type __n )
inlinestaticconstexpr

Deallocate memory.

Parameters
__aAn allocator.
__pPointer to the memory to deallocate.
__nThe number of objects space was allocated for.

Calls a.deallocate(p, n)

Definition at line 549 of file bits/alloc_traits.h.

◆ destroy()

template<typename _Tp >
template<typename _Up >
static constexpr void std::allocator_traits< allocator< _Tp > >::destroy ( allocator_type & __a,
_Up * __p )
inlinestaticconstexprnoexcept

Destroy an object of type _Up.

Parameters
__aAn allocator.
__pPointer to the object to destroy

Calls __a.destroy(__p).

Definition at line 593 of file bits/alloc_traits.h.

◆ max_size()

template<typename _Tp >
static constexpr size_type std::allocator_traits< allocator< _Tp > >::max_size ( const allocator_type & __a)
inlinestaticconstexprnoexcept

The maximum supported allocation size.

Parameters
__aAn allocator.
Returns
__a.max_size()

Definition at line 610 of file bits/alloc_traits.h.

◆ select_on_container_copy_construction()

template<typename _Tp >
static constexpr allocator_type std::allocator_traits< allocator< _Tp > >::select_on_container_copy_construction ( const allocator_type & __rhs)
inlinestaticconstexpr

Obtain an allocator to use when copying a container.

Parameters
__rhsAn allocator.
Returns
__rhs

Definition at line 626 of file bits/alloc_traits.h.


The documentation for this struct was generated from the following file: