Merge branch 'master' into add_fma

test/unit_test/runtime/math_test.cpp

@@ -67,6 +67,11 @@ TEST_CASE("'fma()' on quantity changes the value and the dimension accordingly",
   REQUIRE(fma(1.0 * isq::length[m], 2.0 * one, 2.0 * isq::length[m]) == 4.0 * isq::length[m]);
 }
 
+TEST_CASE("'fma()' returns a common reference.", "[math][fma]")
+{
+  REQUIRE(fma(isq::speed(10.0 * m / s), isq::time(2.0 * s), isq::height(42.0 * m)) == isq::length(62.0 * m));
+}
+
 
 TEST_CASE("'pow<Num, Den>()' on quantity changes the value and the dimension accordingly", "[math][pow]")
 {