std::multimap

std::multimap

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Defined in header <map>
template<
    class Key,
    class T,
    class Compare = std::less<Key>,
    class Allocator = std::allocator<std::pair<const Key, T> >
> class multimap;
(1)
namespace pmr {
    template <class Key, class T, class Compare = std::less<Key>>
    using multimap = std::multimap<Key, T, Compare,
                                  std::pmr::polymorphic_allocator<std::pair<const Key,T>>>;
}
(2) (since C++17)