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• Unicode

Unicode-fix

Fixer for unicode.

Signature

(unicode-fix x) → fixed-x

Arguments

x — Guard (unicodep x).

Returns

fixed-x — Type (unicodep fixed-x).

Definitions and Theorems

Function: unicode-fix

(defun unicode-fix (x)
  (declare (xargs :guard (unicodep x)))
  (mbe :logic (if (unicodep x) x 0)
       :exec x))

Theorem: unicodep-of-unicode-fix

(defthm unicodep-of-unicode-fix
  (b* ((fixed-x (unicode-fix x)))
    (unicodep fixed-x))
  :rule-classes :rewrite)

Theorem: unicode-fix-when-unicodep

(defthm unicode-fix-when-unicodep
  (implies (unicodep x)
           (equal (unicode-fix x) x)))