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Matchstate

Make-matchstate

Basic constructor macro for matchstate structures.

Syntax

(make-matchstate [:index <index>] 
                 [:backrefs <backrefs>])

This is the usual way to construct matchstate structures. It simply conses together a structure with the specified fields.

This macro generates a new matchstate structure from scratch. See also change-matchstate, which can "change" an existing structure, instead.

Definition

This is an ordinary make- macro introduced by defprod.

Macro: make-matchstate

(defmacro make-matchstate (&rest args)
  (std::make-aggregate 'matchstate
                       args '((:index) (:backrefs))
                       'make-matchstate
                       nil))

Function: matchstate

(defun matchstate (index backrefs)
  (declare (xargs :guard (and (natp index)
                              (backref-alist-p backrefs))))
  (declare (xargs :guard t))
  (let ((__function__ 'matchstate))
    (declare (ignorable __function__))
    (b* ((index (mbe :logic (nfix index) :exec index))
         (backrefs (mbe :logic (backref-alist-fix backrefs)
                        :exec backrefs)))
      (std::prod-hons index backrefs))))