std::equivalence_relation(3) C++ Standard Libary std::equivalence_relation(3) NAME std::equivalence_relation - std::equivalence_relation Synopsis Defined in header <concepts> template< class R, class T, class U > (since C++20) concept equivalence_relation = std::relation<R, T, U>; The concept equivalence_relation<R, T, U> specifies that the relation R imposes an equivalence relation on its arguments. Semantic requirements A relation r is an equivalence relation if * it is reflexive: for all x, r(x, x) is true; * it is symmetric: for all a and b, r(a, b) is true if and only if r(b, a) is true; * it is transitive: r(a, b) && r(b, c) implies r(a, c). Notes The distinction between relation and equivalence_relation is purely se- mantic. http://cppreference.com 2024.06.10 std::equivalence_relation(3)
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