std::set::value_compare value_comp() const;

size_type max_size() const;

template< class Key, class T, class Hash, class KeyEqual, class

void pop_back();

key_compare key_comp() const;

size_type size() const;

size_type size() const;

void clear();

template< class... Args > void emplace_front( Args&&

template< class Key, class T, class Compare, class Alloc > bool operator==(