BloombergLP::bslstl::Variant_CountType

This component-private metafunction calculates the number of times (template parameter) t_TYPE occurs in (template parameters) t_HEAD, t_TAIL.... An alternative must have the same cv-qualification as t_TYPE in order to be counted.

Synopsis

Declared in <bslstl_variant.h>

template<
    class t_TYPE,
    class t_HEAD = BSLSTL_VARIANT_NOT_A_TYPE,
    class... t_TAIL>
struct Variant_CountType
    : bsl::integral_constant<size_t, bsl::is_same<t_TYPE, t_HEAD>::value + Variant_CountType<t_TYPE, t_TAIL...>::value>

Base Classes

NameDescription
bsl::integral_constant<size_t, bsl::is_same<t_TYPE, t_HEAD>::value + Variant_CountType<t_TYPE, t_TAIL...>::value>Metafunction representing a compile-time constant of the specified (template parameter) t_TYPE with the specified (template parameter) t_VALUE.

Type Aliases

NameDescription
type Alias for this integral_constant specialization.
value_type

Member Functions

NameDescription
operator() Return a copy of the template argument t_VALUE.
operator value_type

Static Data Members

Name
value

Specializations

NameDescription
Variant_CountType<t_TYPE, BSLSTL_VARIANT_NOT_A_TYPE> Specialization for purposes of the sim_cpp11_features.pl script.