Extend the notion of allocator_traits to apply to both standard allocator and to pointer-to-memory-resource types. If the (template parameter) t_ALLOCATOR is a non-pointer type (i.e., an allocator class), then inherits from bsl::allocator_traits<t_ALLOCATOR>::rebind_traits<t_TYPE>. However, if t_ALLOCATOR is a pointer type, then inherits from bsl::allocator_traits<bsl::allocator<t_TYPE>> for pointers to classes derived from bslma::Allocator and from bsl::allocator_traits<bsl::polymorphic_allocator<t_TYPE>> for pointers to other classes derived from bsl::memory_resource. This primary template is for non-pointer t_ALLOCATOR template arguments.
Declared in <bslma_allocatorutil.h>
template<
class t_ALLOCATOR,
class t_TYPE = char>
struct AllocatorUtil_Traits
: bsl::allocator_traits<t_ALLOCATOR>::rebind_traits<t_TYPE>| Name | Description |
|---|---|
bsl::allocator_traits<t_ALLOCATOR>::rebind_traits<t_TYPE> |
| Name | Description |
|---|---|
AllocatorUtil_Traits<t_MEMORY_RSRC*, t_TYPE> | 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>>. |