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    • Pass

    Pass-fix

    Fixer for pass.

    Signature
    (pass-fix x) → fixed-x
    Arguments
    x — Guard (passp x).
    Returns
    fixed-x — Type (passp fixed-x).

    Definitions and Theorems

    Function: pass-fix

    (defun pass-fix (x)
      (declare (xargs :guard (passp x)))
      (mbe :logic (if (passp x) x :pass)
           :exec x))

    Theorem: passp-of-pass-fix

    (defthm passp-of-pass-fix
      (b* ((fixed-x (pass-fix x)))
        (passp fixed-x))
      :rule-classes :rewrite)

    Theorem: pass-fix-when-passp

    (defthm pass-fix-when-passp
      (implies (passp x)
               (equal (pass-fix x) x)))