C++ In a Nutshell

Name

operator< function template — Compares maps for less-than

Synopsis

template <class Key, class T, class Comp, class Alloc>
bool operator<(const map<Key,T,Comp,Alloc>& x,
               const map<Key,T,Comp,Alloc>& y);
template <class Key, class T, class Comp, class Alloc>
bool operator<(const multimap<Key,T,Comp,Alloc>& x,
                const multimap<Key,T,Comp,Alloc>& y);

The < operator determines whether x is less than y, using the same algorithm as lexicographical_compare(x.begin( ), x.end( ), y.begin( ), y.end( )).

See Also

lexicographical_compare in <algorithm>