This component-private metafunction calculates the zero-based index of (template parameter) t_TYPE in the list of alternatives in (template parameter) t_VARIANT, or bsl::variant_npos if there is no such alternative. The primary template (used when t_VARIANT is not a bsl::variant) is not defined.
Declared in <bslstl_variant.h>
template<
class t_TYPE,
class t_VARIANT>
struct Variant_TypeToIndex;| Name |
|---|
Variant_TypeToIndex<t_TYPE, bsl::variant<t_HEAD, t_TAIL...>> |