isEmpty : tag -> bool
STRUCTURE
SYNOPSIS
Tells if a tag is empty.
DESCRIPTION
An invocation isEmpty t returns true just in case t is the empty tag. Only theorems built solely by HOL proof have an empty tag.
FAILURE
Never fails.
EXAMPLE
- Tag.isEmpty (Thm.tag NOT_FORALL_THM);
> val it = true : bool

SEEALSO
HOL  Kananaskis-10