Standard C++ Library Reference ISO/IEC (VERSION3)

operator<
template<class Ty>
bool operator<(
const Container <Ty>& left,
const Container <Ty>& right);
The template function overloads operator< to compare two objects of template class
Container. The function returns lexicographical_compare(left. begin(),
left. end(), right.begin(), right.end()).
operator<=
template<class Ty>
bool operator<=(
const Container <Ty>& left,
const Container <Ty>& right);
The template function returns !(right < left).
operator>
template<class Ty>
bool operator>(
const Container <Ty>& left,
const Container <Ty>& right);
The template function returns right < left.
operator>=
template<class Ty>
bool operator>=(
const Container <Ty>& left,
const Container <Ty>& right);
The template function returns !(left < right).
swap
template<class Ty>
void swap(