namespace std {
template<class T, class A>
class list;
// TEMPLATE FUNCTIONS
template<class T, class A>
bool operator==(
const list<T, A>& lhs,
const list<T, A>& rhs);
template<class T, class A>
bool operator!=(
const list<T, A>& lhs,
const list<T, A>& rhs);
template<class T, class A>
bool operator<(
const list<T, A>& lhs,
const list<T, A>& rhs);
template<class T, class A>
bool operator>(
const list<T, A>& lhs,
const list<T, A>& rhs);
template<class T, class A>
bool operator<=(
const list<T, A>& lhs,
const list<T, A>& rhs);
template<class T, class A>
bool operator>=(
const list<T, A>& lhs,
const list<T, A>& rhs);
template<class T, class A>
void swap(
list<T, A>& lhs,
list<T, A>& rhs);
}