fix some edge cases of Number operations

Author: SizzinSeal

include/units/units.hpp

@@ -410,18 +410,21 @@ constexpr Q operator-(Q lhs, R rhs)
 }
 
 template<isQuantity Q>
-constexpr Q operator*(Q quantity, double multiple) {
-    return Q(quantity.internal() * multiple);
+    requires(!std::is_same_v<Q, Number>)
+constexpr Q operator*(Q quantity, Number multiple) {
+    return Q(quantity.internal() * multiple.internal());
 }
 
 template<isQuantity Q>
-constexpr Q operator*(double multiple, Q quantity) {
-    return Q(quantity.internal() * multiple);
+    requires(!std::is_same_v<Q, Number>)
+constexpr Q operator*(Number multiple, Q quantity) {
+    return Q(quantity.internal() * multiple.internal());
 }
 
 template<isQuantity Q>
-constexpr Q operator/(Q quantity, double divisor) {
-    return Q(quantity.internal() / divisor);
+    requires(!std::is_same_v<Q, Number>)
+constexpr Q operator/(Q quantity, Number divisor) {
+    return Q(quantity.internal() / divisor.internal());
 }
 
 template<isQuantity Q1, isQuantity Q2>

src/main.cpp

@@ -28,6 +28,14 @@ void initialize() {
     ab *= a;
 }
 
+constexpr void numberOperatorTests() {
+    Number a = Number(2) * 2;
+    Number b = 2 * Number(2);
+    Number c = 1 / Number(2);
+    Number d = Number(2) / 2;
+    auto e = Number(1) / 2_in;
+}
+
 constexpr void miscTests() {
     units::AccelerationPose a(1_mps2, 2_mps2);
     Number num = Number(1.0);