Method reset

external/parallel_hashmap/phmap_base.h:2294–2294

optional::reset() Destroys the inner `T` value of an `phmap::optional` if one is present.

    //
    // Destroys the inner `T` value of an `phmap::optional` if one is present.
    PHMAP_ATTRIBUTE_REINITIALIZES void reset() noexcept { this->destruct(); }

    // optional::emplace()
    //