23 Containers library [containers]

23.4 Associative containers [associative]

23.4.5 Class template multimap [multimap] multimap modifiers [multimap.modifiers]

template <class P> iterator insert(P&& x); template <class P> iterator insert(const_iterator position, P&& x);

Effects: The first form is equivalent to return emplace(std::forward<P>(x)). The second form is equivalent to return emplace_hint(position, std::forward<P>(x)).

Remarks: These signatures shall not participate in overload resolution unless std::is_constructible<value_type, P&&>::value is true.