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H-char

H-char->code

Get the code field from a h-char.

Signature
(h-char->code x) → code
Arguments: x — Guard (h-char-p x).
Returns: code — Type (natp code).

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

Definitions and Theorems

Function: h-char->code$inline

(defun h-char->code$inline (x)
  (declare (xargs :guard (h-char-p x)))
  (declare (xargs :guard t))
  (mbe :logic (b* ((x (and t x))) (nfix x))
       :exec x))

Theorem: natp-of-h-char->code

(defthm natp-of-h-char->code
  (b* ((code (h-char->code$inline x)))
    (natp code))
  :rule-classes :rewrite)

Theorem: h-char->code$inline-of-h-char-fix-x

(defthm h-char->code$inline-of-h-char-fix-x
  (equal (h-char->code$inline (h-char-fix x))
         (h-char->code$inline x)))

Theorem: h-char->code$inline-h-char-equiv-congruence-on-x

(defthm h-char->code$inline-h-char-equiv-congruence-on-x
  (implies (h-char-equiv x x-equiv)
           (equal (h-char->code$inline x)
                  (h-char->code$inline x-equiv)))
  :rule-classes :congruence)