Major Section: THEORIES
Example: (active-runep '(:rewrite left-to-right)) General Form: (active-runep rune)where
rune has the shape of a rune. This macro expands to an
expression using the variables ens and state, and returns non-nil
when the given rune exists and is enabled (according to the given
``enabled structure,'' ens, and the current logical world of the
given state). See theory-invariant for how this macro can be of
use.