;;; Lisplab, vector1-funmat.lisp
;;; General, storeless vectors

;;; Copyright (C) 2012 Joern Inge Vestgaarden
;;;
;;; This program is free software; you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 2 of the License, or
;;; (at your option) any later version.
;;;
;;; This program is distributed in the hope that it will be useful,
;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License along
;;; with this program; if not, write to the Free Software Foundation, Inc.,
;;; 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

(in-package :lisplab)

;;; Function matrices (matrices without a store)

(defclass function-vector (vector-base)
  ((vref
    :initarg :vref
    :initform (constantly 0)
    :accessor function-matrix-vref 
    :type function)
   (set-vref
    :initarg :set-vref
    :initform (constantly nil)
    :accessor function-matrix-set-vref
    :type function))
  (:documentation "Vector without a store."))

;;; Level1 methods specialized for the function matrix

(defmethod vref ((f function-vector) idx)
  (funcall (function-matrix-vref f) f idx))

(defmethod (setf vref) (value (f function-vector) idx)
  (funcall (function-matrix-set-vref f) value f idx))