BloombergLP::bslma::AllocatorTraits_IsAlwaysEqual

This struct template sets the boolean type for the attribute named is_always_equal to the nested type alias in the given (template parameter) ALLOC if ALLOC defines such an alias (i.e., if true == AllocatorTraits_HasIsAlwaysEqual<ALLOCATOR_TYPE>::value).

Synopsis

Declared in <bslma_allocatortraits.h>

template<
    class ALLOC,
    bool = AllocatorTraits_HasIsAlwaysEqual<ALLOC>::value>
struct AllocatorTraits_IsAlwaysEqual
    : ALLOC::is_always_equal

Base Classes

NameDescription
ALLOC::is_always_equal

Specializations

NameDescription
AllocatorTraits_IsAlwaysEqual<ALLOC, false> This struct template sets the boolean type for the attribute named is_always_equal to bsl::is_empty<ALLOC> if the given (template parameter) ALLOC does not define such an alias (i.e., if false == AllocatorTraits_HasIsAlwaysEqual<ALLOCATOR_TYPE>::value).