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

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

reference top();

void clear();

(1)

bool empty() const;

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

std::pair<iterator,iterator> equal_range( const Key& key );

iterator find( const Key& key ); (1)

template< class... Args > iterator emplace( Args&&.