version 4.2.0

move toStdFunction() to pibase.h
refactor PIParseHelper, now it much more abstract and useful
fix PIIODevice::createFromFullPath() when whitespaces at start or end are presence
PIStreamPacker add events for start and end packet receive
PIClientServer::ClientBase add virtual methods for start and end packet receive. also one can enable diagnostics with enableDiagnostics() method
PICout now call flush() on each end of output
add PIString::entries(const PIString & str)

libs/main/state_machine/pistatemachine_base.h

@@ -31,21 +31,6 @@
 
 namespace PIStateMachineHelpers {
 
-template<typename T>
-struct FunctionType {
-	using Type = void;
-};
-
-template<typename Ret, typename Class, typename... Args>
-struct FunctionType<Ret (Class::*)(Args...) const> {
-	using Type = std::function<Ret(Args...)>;
-};
-
-template<typename L>
-typename FunctionType<decltype(&L::operator())>::Type toStdFunction(L const & func) {
-	return func;
-}
-
 class FunctionBase {
 public:
 	virtual ~FunctionBase() {}

libs/main/state_machine/pistatemachine_transition.h

@@ -56,7 +56,7 @@ public:
 
 	template<typename L>
 	PITransitionBase * addGuard(L f) {
-		return addGuard(PIStateMachineHelpers::toStdFunction(f));
+		return addGuard(toStdFunction(f));
 	}
 
 	template<typename... Args>