test cases for the new typedesc features

tests/run/ttypedesc1.nim

@@ -1,10 +1,12 @@
-import unittest
+import unittest, typetraits
 
 type 
   TFoo[T, U] = object
     x: T
     y: U
 
+proc getTypeName(t: typedesc): string = t.name
+
 proc foo(T: typedesc[float], a: expr): string =
   result = "float " & $(a.len > 5)
 
@@ -21,6 +23,9 @@ template foo(T: typedesc[seq]): expr = "seq"
 test "types can be used as proc params":
   # XXX: `check` needs to know that TFoo[int, float] is a type and 
   # cannot be assigned for a local variable for later inspection
+  check ((string.getTypeName == "string"))
+  check ((getTypeName(int) == "int"))
+  
   check ((foo(TFoo[int, float], 1000) == "TFoo 1000"))
   
   var f = 10.0