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• Fgl-syntactic-checker-binders

Check-consp

FGL binder that checks whether X is syntactically cons.

Signature

(check-consp ans x) → *

See fgl-syntactic-checker-binders and see binder for details.

Definitions and Theorems

Function: check-consp

(defun check-consp (ans x)
  (declare (xargs :guard t))
  (let ((__function__ 'check-consp))
    (declare (ignorable __function__))
    (and (consp x) ans t)))

Theorem: check-consp-implies-consp

(defthm check-consp-implies-consp
  (implies (check-consp ans x) (consp x))
  :rule-classes :forward-chaining)