size_type size() const;

template< class... Args > std::pair<iterator,bool> emplace(

size_type count( const Key& key ) const; (1)

void pop_front();

void clear();

size_type size() const;

size_type count( const Key& key ) const; (1)

void swap( stack& other );

Defined in header

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