Provided by: libstdc++-5-doc_5.4.0-6ubuntu1~16.04.12_all 
NAME
std::allocator_traits< _Alloc > -
SYNOPSIS
Inherited by __gnu_cxx::__alloc_traits< _Alloc >.
Public Types
typedef _Alloc allocator_type
typedef __const_pointer const_pointer
typedef __const_void_pointer const_void_pointer
typedef __difference_type difference_type
typedef __pointer pointer
typedef __propagate_on_container_copy_assignment propagate_on_container_copy_assignment
typedef __propagate_on_container_move_assignment propagate_on_container_move_assignment
typedef __propagate_on_container_swap propagate_on_container_swap
template<typename _Tp > using rebind_alloc = typename __alloctr_rebind< _Alloc, _Tp
>::__type
template<typename _Tp > using rebind_traits = allocator_traits< rebind_alloc< _Tp >>
typedef __size_type size_type
typedef _Alloc::value_type value_type
typedef __void_pointer void_pointer
Static Public Member Functions
static pointer allocate (_Alloc &__a, size_type __n)
static pointer allocate (_Alloc &__a, size_type __n, const_void_pointer __hint)
template<typename _Tp , typename... _Args> static auto construct (_Alloc &__a, _Tp *__p,
_Args &&...__args) -> decltype(_S_construct(__a, __p, std::forward< _Args
>(__args)...))
static void deallocate (_Alloc &__a, pointer __p, size_type __n)
template<typename _Tp > static void destroy (_Alloc &__a, _Tp *__p)
static size_type max_size (const _Alloc &__a) noexcept
static _Alloc select_on_container_copy_construction (const _Alloc &__rhs)
Detailed Description
template<typename _Alloc>
struct std::allocator_traits< _Alloc >" Uniform interface to all allocator types.
Definition at line 83 of file bits/alloc_traits.h.
Member Typedef Documentation
template<typename _Alloc> typedef _Alloc std::allocator_traits< _Alloc >::allocator_type
The allocator type.
Definition at line 86 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __const_pointer std::allocator_traits< _Alloc
>::const_pointer
The allocator's const pointer type. Alloc::const_pointer if that type exists, otherwise
pointer_traits<pointer>::rebind<const value_type>
Definition at line 116 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __const_void_pointer std::allocator_traits< _Alloc
>::const_void_pointer
The allocator's const void pointer type. Alloc::const_void_pointer if that type exists,
otherwise pointer_traits<pointer>::rebind<const void>
Definition at line 138 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __difference_type std::allocator_traits< _Alloc
>::difference_type
The allocator's difference type. Alloc::difference_type if that type exists, otherwise
pointer_traits<pointer>::difference_type
Definition at line 149 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __pointer std::allocator_traits< _Alloc >::pointer
The allocator's pointer type. Alloc::pointer if that type exists, otherwise value_type*
Definition at line 105 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __propagate_on_container_copy_assignment
std::allocator_traits< _Alloc >::propagate_on_container_copy_assignment
How the allocator is propagated on copy assignment.
Alloc::propagate_on_container_copy_assignment if that type exists, otherwise false_type
Definition at line 172 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __propagate_on_container_move_assignment
std::allocator_traits< _Alloc >::propagate_on_container_move_assignment
How the allocator is propagated on move assignment.
Alloc::propagate_on_container_move_assignment if that type exists, otherwise false_type
Definition at line 184 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __propagate_on_container_swap std::allocator_traits< _Alloc
>::propagate_on_container_swap
How the allocator is propagated on swap. Alloc::propagate_on_container_swap if that type
exists, otherwise false_type
Definition at line 195 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __size_type std::allocator_traits< _Alloc >::size_type
The allocator's size type. Alloc::size_type if that type exists, otherwise
make_unsigned<difference_type>::type
Definition at line 160 of file bits/alloc_traits.h.
template<typename _Alloc> typedef _Alloc::value_type std::allocator_traits< _Alloc
>::value_type
The allocated type.
Definition at line 88 of file bits/alloc_traits.h.
template<typename _Alloc> typedef __void_pointer std::allocator_traits< _Alloc >::void_pointer
The allocator's void pointer type. Alloc::void_pointer if that type exists, otherwise
pointer_traits<pointer>::rebind<void>
Definition at line 127 of file bits/alloc_traits.h.
Member Function Documentation
template<typename _Alloc> static pointer std::allocator_traits< _Alloc >::allocate (_Alloc &
__a, size_type __n) [inline], [static]
Allocate memory.
Parameters:
__a An allocator.
__n The number of objects to allocate space for.
Calls a.allocate(n)
Definition at line 359 of file bits/alloc_traits.h.
Referenced by std::__allocate_guarded().
template<typename _Alloc> static pointer std::allocator_traits< _Alloc >::allocate (_Alloc &
__a, size_type __n, const_void_pointer __hint) [inline], [static]
Allocate memory.
Parameters:
__a An allocator.
__n The number of objects to allocate space for.
__hint Aid to locality.
Returns:
Memory of suitable size and alignment for n objects of type value_type
Returns a.allocate(n, hint) if that expression is well-formed, otherwise returns
a.allocate(n)
Definition at line 374 of file bits/alloc_traits.h.
template<typename _Alloc> template<typename _Tp , typename... _Args> static auto
std::allocator_traits< _Alloc >::construct (_Alloc & __a, _Tp * __p, _Args &&... __args)
-> decltype(_S_construct(__a, __p, std::forward<_Args>(__args)...))
[inline], [static]"
Construct an object of type _Tp.
Parameters:
__a An allocator.
__p Pointer to memory of suitable size and alignment for Tp
__args Constructor arguments.
Calls __a.construct(__p, std::forward<Args>(__args)...) if that expression is well-
formed, otherwise uses placement-new to construct an object of type _Tp at location __p
from the arguments __args...
Definition at line 400 of file bits/alloc_traits.h.
template<typename _Alloc> static void std::allocator_traits< _Alloc >::deallocate (_Alloc &
__a, pointer __p, size_type __n) [inline], [static]
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 385 of file bits/alloc_traits.h.
Referenced by std::__allocated_ptr< _Alloc >::~__allocated_ptr().
template<typename _Alloc> template<typename _Tp > static void std::allocator_traits< _Alloc
>::destroy (_Alloc & __a, _Tp * __p) [inline], [static]
Destroy an object of type _Tp.
Parameters:
__a An allocator.
__p Pointer to the object to destroy
Calls __a.destroy(__p) if that expression is well-formed, otherwise calls __p->~_Tp()
Definition at line 413 of file bits/alloc_traits.h.
template<typename _Alloc> static size_type std::allocator_traits< _Alloc >::max_size (const
_Alloc & __a) [inline], [static], [noexcept]
The maximum supported allocation size.
Parameters:
__a An allocator.
Returns:
__a.max_size() or numeric_limits<size_type>::max()
Returns __a.max_size() if that expression is well-formed, otherwise returns
numeric_limits<size_type>::max()
Definition at line 424 of file bits/alloc_traits.h.
template<typename _Alloc> static _Alloc std::allocator_traits< _Alloc
>::select_on_container_copy_construction (const _Alloc & __rhs) [inline], [static]
Obtain an allocator to use when copying a container.
Parameters:
__rhs An allocator.
Returns:
__rhs.select_on_container_copy_construction() or __rhs
Returns __rhs.select_on_container_copy_construction() if that expression is well-formed,
otherwise returns __rhs
Definition at line 436 of file bits/alloc_traits.h.
Author
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