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Schar-array

Schar-array->elements

Get the elements field from a schar-array.

Signature
(schar-array->elements x) → elements
Arguments: x — Guard (schar-arrayp x).
Returns: elements — Type (schar-listp elements).

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

Definitions and Theorems

Function: schar-array->elements$inline

(defun schar-array->elements$inline (x)
  (declare (xargs :guard (schar-arrayp x)))
  (declare (xargs :guard t))
  (let ((__function__ 'schar-array->elements))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((x (and t x))
              (elemtype (type-fix (std::da-nth 0 (cdr x))))
              (elements (schar-list-fix (std::da-nth 1 (cdr x)))))
           (if (consp elements)
               elements
             (list (schar-from-integer 0))))
         :exec (std::da-nth 1 (cdr x)))))

Theorem: schar-listp-of-schar-array->elements

(defthm schar-listp-of-schar-array->elements
  (b* ((elements (schar-array->elements$inline x)))
    (schar-listp elements))
  :rule-classes :rewrite)

Theorem: schar-array->elements$inline-of-schar-array-fix-x

(defthm schar-array->elements$inline-of-schar-array-fix-x
  (equal (schar-array->elements$inline (schar-array-fix x))
         (schar-array->elements$inline x)))

Theorem: schar-array->elements$inline-schar-array-equiv-congruence-on-x

(defthm
     schar-array->elements$inline-schar-array-equiv-congruence-on-x
  (implies (schar-array-equiv x x-equiv)
           (equal (schar-array->elements$inline x)
                  (schar-array->elements$inline x-equiv)))
  :rule-classes :congruence)