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Char-result-ok

Char-result-ok->get

Get the get field from a char-result-ok.

Signature
(char-result-ok->get acl2::x) → get
Arguments: acl2::x — Guard (char-resultp acl2::x).
Returns: get — Type (charp get).

This is an ordinary field accessor created by fty::defprod.

Definitions and Theorems

Function: char-result-ok->get$inline

(defun char-result-ok->get$inline (acl2::x)
  (declare (xargs :guard (char-resultp acl2::x)))
  (declare (xargs :guard (equal (char-result-kind acl2::x) :ok)))
  (let ((__function__ 'char-result-ok->get))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((acl2::x (and (equal (char-result-kind acl2::x) :ok)
                            acl2::x)))
           (char-fix acl2::x))
         :exec acl2::x)))

Theorem: charp-of-char-result-ok->get

(defthm charp-of-char-result-ok->get
  (b* ((get (char-result-ok->get$inline acl2::x)))
    (charp get))
  :rule-classes :rewrite)

Theorem: char-result-ok->get$inline-of-char-result-fix-x

(defthm char-result-ok->get$inline-of-char-result-fix-x
  (equal (char-result-ok->get$inline (char-result-fix acl2::x))
         (char-result-ok->get$inline acl2::x)))

Theorem: char-result-ok->get$inline-char-result-equiv-congruence-on-x

(defthm char-result-ok->get$inline-char-result-equiv-congruence-on-x
  (implies (char-result-equiv acl2::x x-equiv)
           (equal (char-result-ok->get$inline acl2::x)
                  (char-result-ok->get$inline x-equiv)))
  :rule-classes :congruence)

Theorem: char-result-ok->get-when-wrong-kind

(defthm char-result-ok->get-when-wrong-kind
  (implies (not (equal (char-result-kind acl2::x) :ok))
           (equal (char-result-ok->get acl2::x)
                  (char-fix nil))))