operators (std::list)

operator==,!=,<,<=,>,>=(std::list)

template< class T, class Alloc >
bool operator==( const list<T,Alloc>& lhs,
                 const list<T,Alloc>& rhs );
(1)
template< class T, class Alloc >
bool operator!=( const list<T,Alloc>& lhs,
                 const list<T,Alloc>& rhs );
(2)
template< class T, class Alloc >
bool operator<( const list<T,Alloc>& lhs,
                const list<T,Alloc>& rhs );
(3)
template< class T, class Allo