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#pragma once
#include <utility>
template<typename T, template<typename... S> typename Container> class pack : protected Container<T> {
public:
using Container<T>::Container;
using Container<T>::begin;
using Container<T>::end;
using Container<T>::rbegin;
using Container<T>::rend;
using Container<T>::cbegin;
using Container<T>::cend;
using Container<T>::crbegin;
using Container<T>::crend;
using Container<T>::clear;
using Container<T>::empty;
using Container<T>::size;
using Container<T>::capacity;
using Container<T>::shrink_to_fit;
using Container<T>::at;
using Container<T>::data;
using Container<T>::operator[];
template<typename... Ps>
decltype(auto)
emplace(Ps &&... ps)
{
return Container<T>::emplace_back(std::forward<Ps>(ps)...);
}
void
erase(typename Container<T>::iterator pos)
{
if (&*pos != &Container<T>::back()) {
*pos = std::move(Container<T>::back());
}
Container<T>::pop_back();
}
};
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