		Search-engine friendly clone of the ACL2 documentation.

Expression-option

Expression-optionp

Recognizer for expression-option structures.

Signature
(expression-optionp x) → *

Definitions and Theorems

Function: expression-optionp

(defun expression-optionp (x)
  (declare (xargs :guard t))
  (let ((__function__ 'expression-optionp))
    (declare (ignorable __function__))
    (cond ((not x) (b* nil t))
          (t (b* ((fty::val x))
               (expressionp fty::val))))))