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Lifetime-option

Lifetime-optionp

Recognizer for lifetime-option structures.

Signature
(lifetime-optionp x) → *

Definitions and Theorems

Function: lifetime-optionp

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