is_vartype : type -> bool
STRUCTURE
SYNOPSIS
Tests a type to see if it is a type variable.
FAILURE
Never fails.
EXAMPLE
- is_vartype Type.alpha;
> val it = true : bool

- is_vartype bool;
> val it = false : bool

- is_vartype (Type `:'a  -> bool`);
> val it = false : bool

SEEALSO
HOL  Kananaskis-10