		Search-engine friendly clone of the ACL2 documentation.

Oslib

Basename!

Remove the leading directory part of a path, or cause a hard error if there is any problem.

Signature
(basename! path &key (state 'state)) → (mv basename state)
Arguments: path — Guard (stringp path).
Returns: basename — Type (stringp basename).; state — Type (state-p1 state), given (force (state-p1 state)).

This is just a wrapper for basename that causes an error on any failure.

Definitions and Theorems

Function: basename!-fn

(defun basename!-fn (path state)
  (declare (xargs :stobjs (state)))
  (declare (xargs :guard (stringp path)))
  (let ((__function__ 'basename!))
    (declare (ignorable __function__))
    (b* (((mv err basename state)
          (basename path))
         ((when err)
          (raise "Basename failed: ~@0" err)
          (mv "" state)))
      (mv basename state))))

Theorem: stringp-of-basename!.basename

(defthm stringp-of-basename!.basename
  (b* (((mv ?basename acl2::?state)
        (basename!-fn path state)))
    (stringp basename))
  :rule-classes :type-prescription)

Theorem: state-p1-of-basename!.state

(defthm state-p1-of-basename!.state
  (implies (force (state-p1 state))
           (b* (((mv ?basename acl2::?state)
                 (basename!-fn path state)))
             (state-p1 state)))
  :rule-classes :rewrite)