boost::algorithm::is_less — is_less functor
struct is_less { // public member functions template<typename T1, typename T2> bool operator()(const T1 &, const T2 &) const; };
Convenient version of standard std::less. Operation is templated, therefore it is not required to specify the exact types upon the construction
is_less
template<typename T1, typename T2> bool operator()(const T1 & Arg1, const T2 & Arg2) const;
Compare two operands using > operator