BloombergLP::bslma::AllocatorUtil_Traits<t_MEMORY_RSRC*, t_TYPE>

Traits for an allocator expressed as a pointer to a memory resource.

Synopsis

Declared in <bslma_allocatorutil.h>

template<
    class t_MEMORY_RSRC,
    class t_TYPE>
struct AllocatorUtil_Traits<t_MEMORY_RSRC*, t_TYPE>
    : bsl::allocator_traits<bsl::conditional<bsl::is_convertible<t_MEMORY_RSRC *, bslma::Allocator *>::value, bsl::allocator<t_TYPE>, bsl::polymorphic_allocator<t_TYPE>>::type>

Description

This specialization is for allocators expressed as a pointer to class derived from bsl::memory_resource. The base class will be bsl::allocator_traits<bsl::allocator<t_TYPE>> if t_MEMORY_RSRC is derived from bsl::Allocator; otherwise the base class will be bsl::allocator_traits<bsl::polymorphic_allocator<t_TYPE>>.

Base Classes

Name

Description

bsl::allocator_traits<bsl::conditional<bsl::is_convertible<t_MEMORY_RSRC *, bslma::Allocator *>::value, bsl::allocator<t_TYPE>, bsl::polymorphic_allocator<t_TYPE>>::type>

Uniform interface to nested types and operations of any allocator.

Type Aliases

Name

Description

allocator_type

This typedef is an alias to the (template parameter) ALLOCATOR_TYPE.

const_pointer

This typedef is an alias to AllocatorTraits_ConstPointerType<ALLOCATOR_TYPE>::type.

const_void_pointer

Const void pointer type for the allocator.

difference_type

This typedef is an alias to AllocatorTraits_DifferenceType<ALLOCATOR_TYPE>::type.

is_always_equal

true_type if two allocators always compare equal; else false_type.

This typedef is an alias to AllocatorTraits_PointerType<ALLOCATOR_TYPE>::type.

propagate_on_container_copy_assignment

true_type if the allocator propagates on copy assignment.

propagate_on_container_move_assignment

true_type if the allocator propagates on move assignment.

propagate_on_container_swap

true_type if the allocator propagates on container swap.

Rebind this allocator to the specified ELEMENT_TYPE.

rebind_traits

Rebind this allocator traits type to the specified ELEMENT_TYPE.

This typedef is an alias to AllocatorTraits_SizeType<ALLOCATOR_TYPE>::type.

This typedef is an alias to ALLOCATOR_TYPE::value_type.

This typedef is an alias to AllocatorTraits_VoidPointerType<ALLOCATOR_TYPE>::type.

Static Member Functions

Name

Description

allocate overloads

Construct an ELEMENT_TYPE object at elementAddr.

Deallocate the storage at elementAddr for n objects.

Destroy the ELEMENT_TYPE object at elementAddr.

Return the maximum number of objects allocate can return.

select_on_container_copy_construction

Return the allocator to use when copy‐constructing a container.

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