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Pos-option

Pos-optionp

Recognizer for pos-option structures.

Signature
(pos-optionp x) → *

Definitions and Theorems

Function: pos-optionp

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