__gnu_cxx::__alloc_traits< _Alloc, typename >(3cxx)

NAME
__gnu_cxx::__alloc_traits< _Alloc, typename > - Uniform interface to C++98 and C++11 allocators.

SYNOPSIS

Inherits std::allocator_traits< _Alloc >.

  Public Types

typedef std::allocator_traits< _Alloc > _Base_type
typedef _Alloc allocator_type
typedef _Base_type::const_pointer const_pointer
typedef const value_type & const_reference
using const_void_pointer = typename _Ptr< __cv_pointer, const void >::type
The allocator's const void pointer type.
typedef _Base_type::difference_type difference_type
using is_always_equal = __detected_or_t< typename is_empty< _Alloc >::type, __equal, _Alloc >
Whether all instances of the allocator type compare equal.
typedef _Base_type::pointer pointer
using propagate_on_container_copy_assignment = __detected_or_t< false_type, __pocca, _Alloc >
How the allocator is propagated on copy assignment.
using propagate_on_container_move_assignment = __detected_or_t< false_type, __pocma, _Alloc >
How the allocator is propagated on move assignment.
using propagate_on_container_swap = __detected_or_t< false_type, __pocs, _Alloc >
How the allocator is propagated on swap.
template<typename _Tp > using rebind_alloc = __alloc_rebind< _Alloc, _Tp >
template<typename _Tp > using rebind_traits = allocator_traits< rebind_alloc< _Tp > >
typedef value_type & reference
typedef _Base_type::size_type size_type
typedef _Base_type::value_type value_type
using void_pointer = typename _Ptr< __v_pointer, void >::type
The allocator's void pointer type.

  Static Public Member Functions

static constexpr bool _S_always_equal ()
static constexpr bool _S_nothrow_move ()
static void _S_on_swap (_Alloc &__a, _Alloc &__b)
static constexpr bool _S_propagate_on_copy_assign ()
static constexpr bool _S_propagate_on_move_assign ()
static constexpr bool _S_propagate_on_swap ()
static _Alloc _S_select_on_copy (const _Alloc &__a)
static pointer allocate (_Alloc &__a, size_type __n)
Allocate memory.
static pointer allocate (_Alloc &__a, size_type __n, const_void_pointer __hint)
Allocate memory.
template<typename _Ptr , typename... _Args> static std::enable_if< __is_custom_pointer< _Ptr >::value >::type construct (_Alloc &__a, _Ptr __p, _Args &&... __args)
template<typename _Tp , typename... _Args> static auto construct (_Alloc &__a, _Tp *__p, _Args &&... __args) -> decltype(_S_construct(__a, __p, std::forward< _Args >(__args)...))
Construct an object of type _Tp.
static void deallocate (_Alloc &__a, pointer __p, size_type __n)
Deallocate memory.
template<typename _Ptr > static std::enable_if< __is_custom_pointer< _Ptr >::value >::type destroy (_Alloc &__a, _Ptr __p)
template<typename _Tp > static void destroy (_Alloc &__a, _Tp *__p)
Destroy an object of type _Tp.
static size_type max_size (const _Alloc &__a) noexcept
The maximum supported allocation size.
static _Alloc select_on_container_copy_construction (const _Alloc &__rhs)
Obtain an allocator to use when copying a container.

  Protected Types

template<typename _Tp > using __c_pointer = typename _Tp::const_pointer
template<typename _Tp > using __cv_pointer = typename _Tp::const_void_pointer
template<typename _Tp > using __equal = typename _Tp::is_always_equal
template<typename _Tp > using __pocca = typename _Tp::propagate_on_container_copy_assignment
template<typename _Tp > using __pocma = typename _Tp::propagate_on_container_move_assignment
template<typename _Tp > using __pocs = typename _Tp::propagate_on_container_swap
template<typename _Tp > using __pointer = typename _Tp::pointer
template<typename _Tp > using __v_pointer = typename _Tp::void_pointer

Detailed Description

  template<typename _Alloc, typename = typename _Alloc::value_type>
struct __gnu_cxx::__alloc_traits< _Alloc, typename >" Uniform interface to C++98 and C++11 allocators.

Definition at line 50 of file ext/alloc_traits.h.

Member Typedef Documentation

  template<typename _Alloc> using std::allocator_traits< _Alloc >::const_void_pointer = typename _Ptr<__cv_pointer, const void>::type [inherited]

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 151 of file bits/alloc_traits.h.

  template<typename _Alloc> using std::allocator_traits< _Alloc >::is_always_equal = __detected_or_t<typename is_empty<_Alloc>::type, __equal, _Alloc> [inherited]

Whether all instances of the allocator type compare equal. Alloc::is_always_equal if that type exists, otherwise is_empty<Alloc>::type

Definition at line 203 of file bits/alloc_traits.h.

  template<typename _Alloc> using std::allocator_traits< _Alloc >::propagate_on_container_copy_assignment = __detected_or_t<false_type, __pocca, _Alloc> [inherited]

How the allocator is propagated on copy assignment. Alloc::propagate_on_container_copy_assignment if that type exists, otherwise false_type

Definition at line 176 of file bits/alloc_traits.h.

  template<typename _Alloc> using std::allocator_traits< _Alloc >::propagate_on_container_move_assignment = __detected_or_t<false_type, __pocma, _Alloc> [inherited]

How the allocator is propagated on move assignment. Alloc::propagate_on_container_move_assignment if that type exists, otherwise false_type

Definition at line 185 of file bits/alloc_traits.h.

  template<typename _Alloc> using std::allocator_traits< _Alloc >::propagate_on_container_swap = __detected_or_t<false_type, __pocs, _Alloc> [inherited]

How the allocator is propagated on swap. Alloc::propagate_on_container_swap if that type exists, otherwise false_type

Definition at line 194 of file bits/alloc_traits.h.

  template<typename _Alloc> using std::allocator_traits< _Alloc >::void_pointer = typename _Ptr<__v_pointer, void>::type [inherited]

The allocator's void pointer type. Alloc::void_pointer if that type exists, otherwise pointer_traits<pointer>::rebind<void>

Definition at line 143 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], [inherited]

Allocate memory.

Parameters:
    __a An allocator.
    __n The number of objects to allocate space for.

Calls a.allocate(n)

Definition at line 300 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], [inherited]

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 315 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], [inherited]"

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 342 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], [inherited]

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 327 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], [inherited]

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 355 of file bits/alloc_traits.h.

  template<typename _Alloc> static size_type std::allocator_traits< _Alloc >::max_size (const _Alloc & __a) [inline], [static], [noexcept], [inherited]

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 366 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], [inherited]

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 378 of file bits/alloc_traits.h.

Author

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