LatchedParameter: operator= and unit tests

Author: danngreen

tests/parameter_tests.cc

@@ -0,0 +1,26 @@
+#include "doctest.h"
+#include "util/parameter.hh"
+
+TEST_CASE("basic usage") {
+
+	//
+	LatchedParam<float, 1, 4096> x;
+	LatchedParam<float, 1, 4096> y;
+
+	x = 2.4f;
+	CHECK(x.val == 2.4f);
+	CHECK(x.changed == false);
+
+	x.store_changed(10.f);
+	CHECK(x.val == 10.f);
+	CHECK(x.changed == true);
+
+	CHECK(y.val == 0.f);
+	CHECK(y.changed == false);
+	y = x;
+	CHECK(y.val == 10.f);
+	CHECK(y.changed == true);
+
+	CHECK(y.did_change());
+	CHECK_FALSE(y.did_change());
+}

util/parameter.hh

@@ -32,6 +32,13 @@ struct LatchedParam {
 	void operator=(T x) {
 		val = x;
 	}
+
+	LatchedParam &operator=(LatchedParam const &x) {
+		val = x.val;
+		changed = x.changed;
+		return *this;
+	}
+
 	operator T() {
 		return val;
 	}