Type casting is working:

docs/TODO.txt

@@ -1,7 +1,10 @@
 DONE: rework type system
 DONE: var decl with a type, but no value
+DONE: type casting
 
-TODO: type casting
+TODO: string concat with the + operator
+TODO: empty string as falsy?
+TODO: remove optimization option
 TODO: increment & decrement operators
 TODO: a = b = c = 1;
 TODO: are compounds shallow or deep copies?