Invoke visitor with an index tag and the active alternative.
Declared in <bslstl_variant.h>
static
t_RET
functionImpl(
t_VISITOR&& visitor,
t_VARIANT&& variant);This component-private function invokes the specified visitor with a bsl::in_place_index_t tag representing the value of (template parameter) t_INDEX and the active alternative object of the specified variant, implicitly converting the return type to (template parameter) t_RET. The behavior is undefined unless t_INDEX is the index of the active alternative.
result of invoking visitor, converted to t_RET
| Name | Description |
|---|---|
| visitor | callable to invoke with the index tag and alternative |
| variant | variant whose active alternative is visited |