BloombergLP::bslstl::Optional_Base<t_TYPE, false>::Optional_Base

template<
    class t_INIT_LIST_TYPE,
    class... t_ARGS>
Optional_Base(
    std::allocator_arg_t,
    AllocType,
    std::in_place_t,
    std::initializer_list<t_INIT_LIST_TYPE>,
    t_ARGS&&...);