src/pcl/fsc.lisp

   1 ;;;; This file contains the definition of the FUNCALLABLE-STANDARD-CLASS
   2 ;;;; metaclass. Much of the implementation of this metaclass is actually
   3 ;;;; defined on the class STD-CLASS. What appears in this file is a modest
   4 ;;;; number of simple methods related to the low-level differences in the
   5 ;;;; implementation of standard and funcallable-standard instances.
   6 ;;;;
   7 ;;;; As it happens, none of these differences are the ones reflected in
   8 ;;;; the MOP specification; STANDARD-CLASS and FUNCALLABLE-STANDARD-CLASS
   9 ;;;; share all their specified methods at STD-CLASS.
  10
  11 ;;;; This software is part of the SBCL system. See the README file for
  12 ;;;; more information.
  13
  14 ;;;; This software is derived from software originally released by Xerox
  15 ;;;; Corporation. Copyright and release statements follow. Later modifications
  16 ;;;; to the software are in the public domain and are provided with
  17 ;;;; absolutely no warranty. See the COPYING and CREDITS files for more
  18 ;;;; information.
  19
  20 ;;;; copyright information from original PCL sources:
  21 ;;;;
  22 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
  23 ;;;; All rights reserved.
  24 ;;;;
  25 ;;;; Use and copying of this software and preparation of derivative works based
  26 ;;;; upon this software are permitted. Any distribution of this software or
  27 ;;;; derivative works must comply with all applicable United States export
  28 ;;;; control laws.
  29 ;;;;
  30 ;;;; This software is made available AS IS, and Xerox Corporation makes no
  31 ;;;; warranty about the software, its performance or its conformity to any
  32 ;;;; specification.
  33
  34 (in-package "SB-PCL")
  35 \f
  36 (defmethod wrapper-fetcher ((class funcallable-standard-class))
  37   'fsc-instance-wrapper)
  38
  39 (defmethod slots-fetcher ((class funcallable-standard-class))
  40   'fsc-instance-slots)
  41
  42 (defmethod raw-instance-allocator ((class funcallable-standard-class))
  43   'allocate-standard-funcallable-instance)
  44
  45 (defmethod allocate-instance
  46            ((class funcallable-standard-class) &rest initargs)
  47   (declare (ignore initargs))
  48   (unless (class-finalized-p class)
  49     (finalize-inheritance class))
  50   (allocate-standard-funcallable-instance (class-wrapper class)))
  51
  52 (defmethod make-reader-method-function ((class funcallable-standard-class)
  53                                         slot-name)
  54   (make-std-reader-method-function class slot-name))
  55
  56 (defmethod make-writer-method-function ((class funcallable-standard-class)
  57                                         slot-name)
  58   (make-std-writer-method-function class slot-name))
  59
  60 ;;;; See the comment about reader-function--std and writer-function--sdt.
  61 ;;;;
  62 ;(define-function-template reader-function--fsc () '(slot-name)
  63 ;  `(function
  64 ;     (lambda (instance)
  65 ;       (slot-value-using-class (wrapper-class (get-wrapper instance))
  66 ;                              instance
  67 ;                              slot-name))))
  68 ;
  69 ;(define-function-template writer-function--fsc () '(slot-name)
  70 ;  `(function
  71 ;     (lambda (nv instance)
  72 ;       (setf
  73 ;        (slot-value-using-class (wrapper-class (get-wrapper instance))
  74 ;                                instance
  75 ;                                slot-name)
  76 ;        nv))))
  77 ;
  78 ;(eval-when (:load-toplevel)
  79 ;  (pre-make-templated-function-constructor reader-function--fsc)
  80 ;  (pre-make-templated-function-constructor writer-function--fsc))