1 ;;;; things which the main SBCL compiler needs to know about the
2 ;;;; implementation of CLOS
4 ;;;; (Our CLOS is derived from PCL, which was implemented in terms of
5 ;;;; portable high-level Common Lisp. But now that it no longer needs
6 ;;;; to be portable, we can make some special hacks to support it
9 ;;;; This software is part of the SBCL system. See the README file for more
12 ;;;; This software is derived from software originally released by Xerox
13 ;;;; Corporation. Copyright and release statements follow. Later modifications
14 ;;;; to the software are in the public domain and are provided with
15 ;;;; absolutely no warranty. See the COPYING and CREDITS files for more
18 ;;;; copyright information from original PCL sources:
20 ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation.
21 ;;;; All rights reserved.
23 ;;;; Use and copying of this software and preparation of derivative works based
24 ;;;; upon this software are permitted. Any distribution of this software or
25 ;;;; derivative works must comply with all applicable United States export
28 ;;;; This software is made available AS IS, and Xerox Corporation makes no
29 ;;;; warranty about the software, its performance or its conformity to any
34 ;;;; very low-level representation of instances with meta-class
37 (defknown sb-pcl::pcl-instance-p (t) boolean
38 (movable foldable flushable explicit-check))
40 (deftransform sb-pcl::pcl-instance-p ((object))
41 (let* ((otype (continuation-type object))
42 (std-obj (specifier-type 'sb-pcl::std-object)))
44 ;; Flush tests whose result is known at compile time.
45 ((csubtypep otype std-obj) t)
46 ((not (types-equal-or-intersect otype std-obj)) nil)
48 `(typep (layout-of object) 'sb-pcl::wrapper)))))
50 (define-source-context defmethod (name &rest stuff)
51 (let ((arg-pos (position-if #'listp stuff)))
53 `(defmethod ,name ,@(subseq stuff 0 arg-pos)
55 (nth-value 2 (sb-pcl::parse-specialized-lambda-list
57 (error () "<illegal syntax>")))
58 `(defmethod ,name "<illegal syntax>"))))
60 (defvar sb-pcl::*internal-pcl-generalized-fun-name-symbols* nil)
62 (defmacro define-internal-pcl-function-name-syntax (name &rest rest)
64 (define-function-name-syntax ,name ,@rest)
65 (pushnew ',name sb-pcl::*internal-pcl-generalized-fun-name-symbols*)))
67 (define-internal-pcl-function-name-syntax sb-pcl::class-predicate (list)
69 (destructuring-bind (name &rest rest) (cdr list)
70 (when (and (symbolp name)
74 (define-internal-pcl-function-name-syntax sb-pcl::slot-accessor (list)
75 (when (= (length list) 4)
76 (destructuring-bind (class slot rwb) (cdr list)
77 (when (and (member rwb '(sb-pcl::reader sb-pcl::writer sb-pcl::boundp))