diff --git a/main.cpp b/main.cpp
index 2f6df3d3..e8a12ffd 100644
--- a/main.cpp
+++ b/main.cpp
@@ -6,17 +6,32 @@
 #include "piethernet.h"
 #include "piintrospection.h"
 
+struct MS {
+	//MS() {i = 0; f = 0.;}
+	int i;
+	float f;
+	PIString s;
+};
+
+PIByteArray & operator<<(PIByteArray & ba, const MS & v) {ba << v.i << v.f << v.s; return ba;}
+PIByteArray & operator>>(PIByteArray & ba, MS & v) {ba >> v.i >> v.f >> v.s; return ba;}
+PICout operator <<(PICout c, const MS & v) {c << "(" << v.i << v.f << v.s << ")"; return c;}
+
+REGISTER_VARIANT(MS)
+REGISTER_VARIANT_CAST(MS, int) {return v.i;}
+REGISTER_VARIANT_CAST(MS, float) {return v.f;}
+REGISTER_VARIANT_CAST(MS, PIString) {return v.s;}
 
 int main (int argc, char * argv[]) {
 	//PIByteArray ba;
-	PIKbdListener kbd;
+	/*PIKbdListener kbd;
 	kbd.enableExitCapture();
 	PIString str;
 	str.reserve(1024*1024);
 	PIINTROSPECTION_START
 	//piCout << PIINTROSPECTION_CONTAINERS->count;
-	WAIT_FOR_EXIT
-	/*PIVector<PIVariant> vl;
+	WAIT_FOR_EXIT*/
+	PIVector<PIVariant> vl;
 	vl << PIVariant('2') << PIVariant(-5.5) << PIVariant(10) << PIVariant(complexd(2,3)) << PIVariant("text") << PIVariant(PIByteArray("bytearray", 9)) << PIVariant(PIDateTime::current());
 	piForeachC (PIVariant v, vl)
 		piCout << v << v.value<PIString>();
@@ -28,7 +43,14 @@ int main (int argc, char * argv[]) {
 	for (PIMap<PIString, __PIVariantInfo__*>::iterator i = __PIVariantInfoStorage__::get()->map->begin(); i != __PIVariantInfoStorage__::get()->map->end(); ++i)
 		piCout << i.key() << i.value()->cast.size();
 	PIEthernet eth;
-	piCout << eth.properties();*/
+	piCout << eth.properties();
+	MS ms = (MS){-1, 3.3, "str"};
+	PIVariant mv = PIVariant::fromValue<MS>(ms);
+	piCout << mv << mv.type();
+	piCout << mv.toInt();
+	piCout << mv.toFloat();
+	piCout << mv.toString();
+	piCout << ms << mv.value<MS>() << vl[0].value<MS>();
 	/*PIScreen screen;
 	TileSimple window;
 	window.back_format.color_back = PIScreenTypes::Red;
diff --git a/src/core/pitime.cpp b/src/core/pitime.cpp
index a0254797..ce3f86c2 100755
--- a/src/core/pitime.cpp
+++ b/src/core/pitime.cpp
@@ -418,26 +418,26 @@ PITimeMeasurer::PITimeMeasurer() {
 }
 
 
-double PITimeMeasurer::elapsed_n() {
+double PITimeMeasurer::elapsed_n() const {
 	return (PISystemTime::current(true) - t_st).toNanoseconds() - PISystemTests::time_elapsed_ns;
 }
 
 
-double PITimeMeasurer::elapsed_u() {
+double PITimeMeasurer::elapsed_u() const {
 	return (PISystemTime::current(true) - t_st).toMicroseconds() - PISystemTests::time_elapsed_ns / 1.E+3;
 }
 
 
-double PITimeMeasurer::elapsed_m() {
+double PITimeMeasurer::elapsed_m() const {
 	return (PISystemTime::current(true) - t_st).toMilliseconds() - PISystemTests::time_elapsed_ns / 1.E+6;
 }
 
 
-double PITimeMeasurer::elapsed_s() {
+double PITimeMeasurer::elapsed_s() const {
 	return (PISystemTime::current(true) - t_st).toSeconds() - PISystemTests::time_elapsed_ns / 1.E+9;
 }
 
 
-PISystemTime PITimeMeasurer::elapsed() {
+PISystemTime PITimeMeasurer::elapsed() const {
 	return (PISystemTime::current(true) - t_st);
 }
diff --git a/src/core/pitime.h b/src/core/pitime.h
index 24f0ada7..ff0711a7 100755
--- a/src/core/pitime.h
+++ b/src/core/pitime.h
@@ -287,19 +287,19 @@ public:
 	void reset() {t_st = PISystemTime::current(true);}
 	
 	//! \brief Returns nanoseconds elapsed from last \a reset() execution or from timer measurer creation.
-	double elapsed_n();
+	double elapsed_n() const;
 
 	//! \brief Returns microseconds elapsed from last \a reset() execution or from timer measurer creation.
-	double elapsed_u();
+	double elapsed_u() const;
 
 	//! \brief Returns milliseconds elapsed from last \a reset() execution or from timer measurer creation.
-	double elapsed_m();
+	double elapsed_m() const;
 
 	//! \brief Returns seconds elapsed from last \a reset() execution or from timer measurer creation.
-	double elapsed_s();
+	double elapsed_s() const;
 
 	//! \brief Returns PISystemTime elapsed from last \a reset() execution or from timer measurer creation.
-	PISystemTime elapsed();
+	PISystemTime elapsed() const;
 	
 	double reset_time_n() const {return t_st.toNanoseconds();}
 	double reset_time_u() const {return t_st.toMicroseconds();}