xquantity: + (xquantity, double) overloads for operator==

Rconybea · May 1, 2024 · 022bef0 · 022bef0
1 parent 9438456
commit 022bef0
Showing 1 changed file with 20 additions and 0 deletions.
diff --git a/include/xo/unit/xquantity.hpp b/include/xo/unit/xquantity.hpp
@@ -371,6 +371,26 @@ namespace xo {
             return (Quantity::compare(x, y) == 0);
         }
 
+        /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
+         **/
+        template <typename Quantity>
+        requires quantity2_concept<Quantity>
+        constexpr auto
+        operator== (const Quantity & x, double y)
+        {
+            return (x == Quantity(y, nu::dimensionless));
+        }
+
+        /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
+         **/
+        template <typename Quantity>
+        requires quantity2_concept<Quantity>
+        constexpr auto
+        operator== (double x, const Quantity & y)
+        {
+            return (Quantity(x, nu::dimensionless) == y);
+        }
+
         /** note: won't have constexpr result until c++26 (when ::sqrt(), ::pow() are constexpr)
          **/
         template <typename Quantity, typename Quantity2>