--- a/sources/basics.h	Sun Dec 14 23:41:00 2014 +0200
+++ b/sources/basics.h	Mon Dec 15 01:41:06 2014 +0200
@@ -63,9 +63,12 @@
 using Function = std::function<Signature>;
 
 FUNCTION print_to_console (const String& a) -> void;
+FUNCTION request_exit() -> void;
 
 template<typename T> inline FUNCTION
 clamp (T a, T b, T c) -> T
 {
 	return (a < b) ? b : (a > c) ? c : a;
 }
+
+struct Exitception {};