Get most D type from type

[Hussien via Digitalmars-d-learn]

I am using Parameters and ReturnType which give me the "name" of 
the type used. e.g.,

int foo(SomeEnum)

will give SomeEnum and int for the type respectively.

What I need to do, is also get the D types that these use.

int is int, but SomeEnum is an enum.

Is there a traits function or some way to reduce the derived type 
to it's most primitive D type?

A specific class should give "class", some enum should give 
"enum", an interface "interface", a function should give 
"function", etc.