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• Primitivex-value

Primitivex-value-fix

Fixer for primitivex-value.

Signature

(primitivex-value-fix x) → fixed-x

Arguments

x — Guard (primitivex-valuep x).

Returns

fixed-x — Type (primitivex-valuep fixed-x).

Definitions and Theorems

Function: primitivex-value-fix

(defun primitivex-value-fix (x)
  (declare (xargs :guard (primitivex-valuep x)))
  (mbe :logic
       (if (primitivex-valuep x)
           x
         (char-value 0))
       :exec x))

Theorem: primitivex-valuep-of-primitivex-value-fix

(defthm primitivex-valuep-of-primitivex-value-fix
  (b* ((fixed-x (primitivex-value-fix x)))
    (primitivex-valuep fixed-x))
  :rule-classes :rewrite)

Theorem: primitivex-value-fix-when-primitivex-valuep

(defthm primitivex-value-fix-when-primitivex-valuep
  (implies (primitivex-valuep x)
           (equal (primitivex-value-fix x) x)))