Sign-optionp
Recognizer for sign-option structures.
- Signature
(sign-optionp x) → *
Definitions and Theorems
Function: sign-optionp
(defun sign-optionp (x)
(declare (xargs :guard t))
(cond ((not x) (b* nil t))
(t (b* ((fty::val x)) (signp fty::val)))))
