This struct template provides a mechanism for determining whether a given (template parameter) ALLOCATOR_TYPE defines a nested alias namedis_always_equal. The static boolean member value (nested alias named type) is true (bsl::true_type) if ALLOCATOR_TYPE defines such an alias, and false (bsl::false_type) otherwise.
Declared in <bslma_allocatortraits.h>
template<class ALLOC>
struct AllocatorTraits_HasIsAlwaysEqual;| Name | Description |
|---|---|
type | integral_constant for whether ALLOC defines is_always_equal. |
| Name | Description |
|---|---|
value | true if ALLOC defines a nested is_always_equal alias. |