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Unicode

Unicode->codepoint

Get the codepoint field from a unicode.

Signature
(unicode->codepoint x) → codepoint
Arguments: x — Guard (unicodep x).
Returns: codepoint — Type (natp codepoint).

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

Definitions and Theorems

Function: unicode->codepoint$inline

(defun unicode->codepoint$inline (x)
  (declare (xargs :guard (unicodep x)))
  (declare (xargs :guard t))
  (let ((__function__ 'unicode->codepoint))
    (declare (ignorable __function__))
    (mbe :logic
         (b* ((x (and t x))
              (codepoint (nfix (cdr (std::da-nth 0 (cdr x))))))
           (if (<= codepoint 1114111) codepoint 0))
         :exec (cdr (std::da-nth 0 (cdr x))))))

Theorem: natp-of-unicode->codepoint

(defthm natp-of-unicode->codepoint
  (b* ((codepoint (unicode->codepoint$inline x)))
    (natp codepoint))
  :rule-classes :rewrite)

Theorem: unicode->codepoint$inline-of-unicode-fix-x

(defthm unicode->codepoint$inline-of-unicode-fix-x
  (equal (unicode->codepoint$inline (unicode-fix x))
         (unicode->codepoint$inline x)))

Theorem: unicode->codepoint$inline-unicode-equiv-congruence-on-x

(defthm unicode->codepoint$inline-unicode-equiv-congruence-on-x
  (implies (unicode-equiv x x-equiv)
           (equal (unicode->codepoint$inline x)
                  (unicode->codepoint$inline x-equiv)))
  :rule-classes :congruence)