std::experimental::ranges::StrictWeakOrder
Min standard notice:
Header: <experimental/ranges/concepts>
The concept StrictWeakOrder<R, T, U> specifies that the Relation R imposes a strict weak ordering on its arguments. A relation r is a strict weak ordering if
# Declarations
template< class R, class T, class U >
concept bool StrictWeakOrder = Relation<R, T, U>;
(ranges TS)
# Notes
The distinction between Relation and StrictWeakOrder is purely semantic.