xo-unit: example: + ex4 .. ex6

example/ex4/ex4.cpp

@@ -0,0 +1,26 @@
+/** @file ex4.cpp **/
+
+#include "xo/unit/quantity.hpp"
+#include <iostream>
+
+int
+main () {
+    namespace u = xo::unit::units;
+    namespace qty = xo::unit::qty;
+    using namespace std;
+
+    /* 20% volatility over 250 days (approx number of trading days in one year) */
+    auto t1 = qty::milliseconds(1);
+    /* 10% volatility over 30 days */
+    auto t2 = qty::minutes(1);
+
+    auto r1 = t1 / t2.with_repr<double>();
+    auto r2 = t2 / t1.with_repr<double>();
+
+    static_assert(same_as<decltype(r1), double>);
+    static_assert(same_as<decltype(r2), double>);
+
+    cerr << "t1: " << t1 << ", t2: " << t2 << ", t1/t2: " << r1 << ", t2/t1: " << r2 << endl;
+}
+
+/** end ex4.cpp */