diff options
Diffstat (limited to 'asl/meta.hpp')
| -rw-r--r-- | asl/meta.hpp | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/asl/meta.hpp b/asl/meta.hpp index 3fd76b4..133d2fb 100644 --- a/asl/meta.hpp +++ b/asl/meta.hpp @@ -164,6 +164,17 @@ template<> struct _is_floating_point_helper<double> : true_type {}; template<typename T> concept is_floating_point = _is_floating_point_helper<un_cv_t<T>>::value;
+template<typename T, typename U>
+concept equality_comparable_with = requires (const un_cvref_t<T>& a, const un_cvref_t<T>& b)
+{
+ { a == b } -> same_as<bool>;
+ { b == a } -> same_as<bool>;
+ { a != b } -> same_as<bool>;
+ { b != a } -> same_as<bool>;
+};
+
+template<typename T> concept equality_comparable = equality_comparable_with<T, T>;
+
struct niche {};
template<typename T>
|