Get the expo? field from a dec-core-fconst-frac.
(dec-core-fconst-frac->expo? x) → expo?
This is an ordinary field accessor created by fty::defprod.
Function:
(defun dec-core-fconst-frac->expo?$inline (x) (declare (xargs :guard (dec-core-fconstp x))) (declare (xargs :guard (equal (dec-core-fconst-kind x) :frac))) (let ((__function__ 'dec-core-fconst-frac->expo?)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and (equal (dec-core-fconst-kind x) :frac) x))) (dec-expo-option-fix (std::da-nth 1 (cdr x)))) :exec (std::da-nth 1 (cdr x)))))
Theorem:
(defthm dec-expo-optionp-of-dec-core-fconst-frac->expo? (b* ((expo? (dec-core-fconst-frac->expo?$inline x))) (dec-expo-optionp expo?)) :rule-classes :rewrite)
Theorem:
(defthm dec-core-fconst-frac->expo?$inline-of-dec-core-fconst-fix-x (equal (dec-core-fconst-frac->expo?$inline (dec-core-fconst-fix x)) (dec-core-fconst-frac->expo?$inline x)))
Theorem:
(defthm dec-core-fconst-frac->expo?$inline-dec-core-fconst-equiv-congruence-on-x (implies (dec-core-fconst-equiv x x-equiv) (equal (dec-core-fconst-frac->expo?$inline x) (dec-core-fconst-frac->expo?$inline x-equiv))) :rule-classes :congruence)
Theorem:
(defthm dec-core-fconst-frac->expo?-when-wrong-kind (implies (not (equal (dec-core-fconst-kind x) :frac)) (equal (dec-core-fconst-frac->expo? x) (dec-expo-option-fix nil))))