Create an Optional_Base object whose contained value is initialized from the specified il and args. Use the specified allocator to supply memory.

Synopsis

Declared in <bslstl_optional.h>

template<
    class t_INIT_LIST_TYPE,
    class... t_ARGS>
Optional_Base(
    std::allocator_arg_t,
    allocator_type allocator,
    std::in_place_t,
    std::initializer_list<t_INIT_LIST_TYPE> il,
    t_ARGS&&... args);

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