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Lsuffix

Lsuffix-kind

Get the kind (tag) of a lsuffix structure.

Signature
(lsuffix-kind x) → kind
Arguments: x — Guard (lsuffixp x).

Definitions and Theorems

Function: lsuffix-kind$inline

(defun lsuffix-kind$inline (x)
  (declare (xargs :guard (lsuffixp x)))
  (let ((__function__ 'lsuffix-kind))
    (declare (ignorable __function__))
    (mbe :logic (cond ((or (atom x) (eq (car x) :locase-l))
                       :locase-l)
                      ((eq (car x) :upcase-l) :upcase-l)
                      ((eq (car x) :locase-ll) :locase-ll)
                      (t :upcase-ll))
         :exec (car x))))

Theorem: lsuffix-kind-possibilities

(defthm lsuffix-kind-possibilities
  (or (equal (lsuffix-kind x) :locase-l)
      (equal (lsuffix-kind x) :upcase-l)
      (equal (lsuffix-kind x) :locase-ll)
      (equal (lsuffix-kind x) :upcase-ll))
  :rule-classes
  ((:forward-chaining :trigger-terms ((lsuffix-kind x)))))