Method insert

common/unordered_inline_set.h:456–459

public:
    template< class InputIt >
    void insert( InputIt first, InputIt last ) {
        for (auto it = first; it != last; ++it)
            insert(*it);
    }
    void insert( std::initializer_list<value_type> ilist ) {
        insert(ilist.begin(), ilist.end());
    }