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• Vl-find-file

Vl-file-exists-p

Signature

(vl-file-exists-p filename state) → (mv exists-p state)

Arguments

filename — Guard (stringp filename).

Returns

exists-p — Type (booleanp exists-p).

state — Type (state-p1 state), given (force (state-p1 state)).

Definitions and Theorems

Function: vl-file-exists-p

(defun vl-file-exists-p (filename state)
  (declare (xargs :stobjs (state)))
  (declare (xargs :guard (stringp filename)))
  (let ((__function__ 'vl-file-exists-p))
    (declare (ignorable __function__))
    (b* ((filename (string-fix filename))
         ((mv channel state)
          (open-input-channel filename
                              :character state))
         ((unless channel) (mv nil state))
         (state (close-input-channel channel state)))
      (mv t state))))

Theorem: booleanp-of-vl-file-exists-p.exists-p

(defthm booleanp-of-vl-file-exists-p.exists-p
  (b* (((mv ?exists-p acl2::?state)
        (vl-file-exists-p filename state)))
    (booleanp exists-p))
  :rule-classes :type-prescription)

Theorem: state-p1-of-vl-file-exists-p.state

(defthm state-p1-of-vl-file-exists-p.state
  (implies (force (state-p1 state))
           (b* (((mv ?exists-p acl2::?state)
                 (vl-file-exists-p filename state)))
             (state-p1 state)))
  :rule-classes :rewrite)

Theorem: vl-file-exists-p-of-str-fix-filename

(defthm vl-file-exists-p-of-str-fix-filename
  (equal (vl-file-exists-p (str-fix filename)
                           state)
         (vl-file-exists-p filename state)))

Theorem: vl-file-exists-p-streqv-congruence-on-filename

(defthm vl-file-exists-p-streqv-congruence-on-filename
  (implies (streqv filename filename-equiv)
           (equal (vl-file-exists-p filename state)
                  (vl-file-exists-p filename-equiv state)))
  :rule-classes :congruence)