This metafunction calculates the number of alternatives in the (possibly cv-qualified) bsl::variant type of (template parameter) t_BSL_VARIANT. The primary template is not defined.
Declared in <bslstl_variant.h>
template<class t_BSL_VARIANT>
struct variant_size;| Name |
|---|
variant_size<t_BSL_VARIANT volatile> |
variant_size<t_BSL_VARIANT const> |
variant_size<t_BSL_VARIANT const volatile> |
variant_size<variant<t_HEAD, t_TAIL...>> |
| Name | Description |
|---|---|
variant_size<t_BSL_VARIANT const> | |
variant_size<t_BSL_VARIANT volatile> | |
variant_size<t_BSL_VARIANT const volatile> |