di::concepts::ThreeWayComparable Concept Reference

#include <di/meta/compare.h>

Concept definition

template<typename T, typename Category partial_ordering>
concept di::concepts::ThreeWayComparable = 
    (detail::ComparesAs<meta::Type<detail::DefinitelyThreeWayComparableWith<T, T>>, Category>) ||
    (detail::WeaklyEqualityComparableWith<T, T> && detail::PartiallyOrderedWith<T, T> &&
     detail::WeaklyThreeWayComparableWith<T, T, Category>)