Get the umarker field from a unicode-input-char.
(unicode-input-char->umarker x) → umarker
This is an ordinary field accessor created by fty::defprod.
Function:
(defun unicode-input-char->umarker$inline (x) (declare (xargs :guard (unicode-input-char-p x))) (declare (xargs :guard t)) (let ((__function__ 'unicode-input-char->umarker)) (declare (ignorable __function__)) (mbe :logic (b* ((x (and t x))) (nfix (std::da-nth 1 (cdr x)))) :exec (std::da-nth 1 (cdr x)))))
Theorem:
(defthm natp-of-unicode-input-char->umarker (b* ((umarker (unicode-input-char->umarker$inline x))) (natp umarker)) :rule-classes :rewrite)
Theorem:
(defthm unicode-input-char->umarker$inline-of-unicode-input-char-fix-x (equal (unicode-input-char->umarker$inline (unicode-input-char-fix x)) (unicode-input-char->umarker$inline x)))
Theorem:
(defthm unicode-input-char->umarker$inline-unicode-input-char-equiv-congruence-on-x (implies (unicode-input-char-equiv x x-equiv) (equal (unicode-input-char->umarker$inline x) (unicode-input-char->umarker$inline x-equiv))) :rule-classes :congruence)