BloombergLP::bslmf::ResultType_Fallback

Metafunction that defines type to be the specified t_FALLBACK type unless t_FALLBACK is bslmf::Nil.

Synopsis

Declared in <bslmf_resulttype.h>

template<class t_FALLBACK>
struct ResultType_Fallback;

Type Aliases

NameDescription
type The fallback type, unless t_FALLBACK is bslmf::Nil.

Specializations

NameDescription
ResultType_Fallback<bslmf::Nil> Specialization of ResultType_Fallback that does not define type if bslmf::Nil is specified as the fallback parameter.

Derived Classes

NameDescription
ResultType_BdeIdiom Metafunction to detect the BDE ResultType idiom.