bool empty() const;

Defined in header

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

const_reference top() const;

void unique(); (1)

allocator_type get_allocator() const;

Defined in header

template <class... Args> iterator emplace_hint( const_iterator

template< class... Args > void emplace( Args&&... args

T* data();