INCOMPATIBLE

declaring that two rules should not both be enabled

Major Section: THEORIES

Example:
(theory-invariant (incompatible (:rewrite left-to-right)
 (:rewrite right-to-left)))
General Form:
(incompatible rune1 rune2)

where rune1 and rune2 are two specific runes. The arguments are not evaluated. Invariant is just a macro that expands into a term that checks that not both runes are enabled. See theory-invariant.