;;;; macros, global variable definitions, and other miscellaneous support stuff ;;;; used by the rest of the PCL subsystem ;;;; This software is part of the SBCL system. See the README file for ;;;; more information. ;;;; This software is derived from software originally released by Xerox ;;;; Corporation. Copyright and release statements follow. Later modifications ;;;; to the software are in the public domain and are provided with ;;;; absolutely no warranty. See the COPYING and CREDITS files for more ;;;; information. ;;;; copyright information from original PCL sources: ;;;; ;;;; Copyright (c) 1985, 1986, 1987, 1988, 1989, 1990 Xerox Corporation. ;;;; All rights reserved. ;;;; ;;;; Use and copying of this software and preparation of derivative works based ;;;; upon this software are permitted. Any distribution of this software or ;;;; derivative works must comply with all applicable United States export ;;;; control laws. ;;;; ;;;; This software is made available AS IS, and Xerox Corporation makes no ;;;; warranty about the software, its performance or its conformity to any ;;;; specification. (in-package "SB-PCL") (/show "starting pcl/macros.lisp") (declaim (declaration ;; As of sbcl-0.7.0.6, SBCL actively uses this declaration ;; to propagate information needed to set up nice debug ;; names (as seen e.g. in BACKTRACE) for method functions. %method-name ;; These nonstandard declarations seem to be used privately ;; within PCL itself to pass information around, so we can't ;; just delete them. %class %method-lambda-list ;; This declaration may also be used within PCL to pass ;; information around, I'm not sure. -- WHN 2000-12-30 %variable-rebinding)) (/show "done with DECLAIM DECLARATION") (defun get-declaration (name declarations &optional default) (dolist (d declarations default) (dolist (form (cdr d)) (when (and (consp form) (eq (car form) name)) (return-from get-declaration (cdr form)))))) (/show "pcl/macros.lisp 85") (defmacro doplist ((key val) plist &body body) `(let ((.plist-tail. ,plist) ,key ,val) (loop (when (null .plist-tail.) (return nil)) (setq ,key (pop .plist-tail.)) (when (null .plist-tail.) (error "malformed plist, odd number of elements")) (setq ,val (pop .plist-tail.)) (progn ,@body)))) (/show "pcl/macros.lisp 101") (defmacro dolist-carefully ((var list improper-list-handler) &body body) `(let ((,var nil) (.dolist-carefully. ,list)) (loop (when (null .dolist-carefully.) (return nil)) (if (consp .dolist-carefully.) (progn (setq ,var (pop .dolist-carefully.)) ,@body) (,improper-list-handler))))) ;;;; FIND-CLASS ;;;; ;;;; This is documented in the CLOS specification. (/show "pcl/macros.lisp 119") (defvar *find-class* (make-hash-table :test 'eq)) (defmacro find-class-cell-class (cell) `(car ,cell)) (defmacro find-class-cell-predicate (cell) `(cadr ,cell)) (defmacro make-find-class-cell (class-name) (declare (ignore class-name)) '(list* nil #'constantly-nil nil)) (defun find-class-cell (symbol &optional dont-create-p) (or (gethash symbol *find-class*) (unless dont-create-p (unless (legal-class-name-p symbol) (error "~S is not a legal class name." symbol)) (setf (gethash symbol *find-class*) (make-find-class-cell symbol))))) (/show "pcl/macros.lisp 157") (defvar *create-classes-from-internal-structure-definitions-p* t) (defun find-class-from-cell (symbol cell &optional (errorp t)) (or (find-class-cell-class cell) (and *create-classes-from-internal-structure-definitions-p* (or (structure-type-p symbol) (condition-type-p symbol)) (ensure-non-standard-class symbol)) (cond ((null errorp) nil) ((legal-class-name-p symbol) (error "There is no class named ~S." symbol)) (t (error "~S is not a legal class name." symbol))))) (defun find-class-predicate-from-cell (symbol cell &optional (errorp t)) (unless (find-class-cell-class cell) (find-class-from-cell symbol cell errorp)) (find-class-cell-predicate cell)) (defun legal-class-name-p (x) (symbolp x)) (defun find-class (symbol &optional (errorp t) environment) (declare (ignore environment)) (find-class-from-cell symbol (find-class-cell symbol errorp) errorp)) (defun find-class-predicate (symbol &optional (errorp t) environment) (declare (ignore environment)) (find-class-predicate-from-cell symbol (find-class-cell symbol errorp) errorp)) ;;; This DEFVAR was originally in defs.lisp, now moved here. ;;; ;;; Possible values are NIL, EARLY, BRAID, or COMPLETE. ;;; ;;; KLUDGE: This should probably become ;;; (DECLAIM (TYPE (MEMBER NIL :EARLY :BRAID :COMPLETE) *BOOT-STATE*)) (defvar *boot-state* nil) (/show "pcl/macros.lisp 187") (define-compiler-macro find-class (&whole form symbol &optional (errorp t) environment) (declare (ignore environment)) (if (and (constantp symbol) (legal-class-name-p (eval symbol)) (constantp errorp) (member *boot-state* '(braid complete))) (let ((symbol (eval symbol)) (errorp (not (null (eval errorp)))) (class-cell (make-symbol "CLASS-CELL"))) `(let ((,class-cell (load-time-value (find-class-cell ',symbol)))) (or (find-class-cell-class ,class-cell) ,(if errorp `(find-class-from-cell ',symbol ,class-cell t) `(and (classoid-cell-classoid ',(find-classoid-cell symbol)) (find-class-from-cell ',symbol ,class-cell nil)))))) form)) (defun (setf find-class) (new-value name &optional errorp environment) (declare (ignore errorp environment)) (cond ((legal-class-name-p name) (with-single-package-locked-error (:symbol name "using ~A as the class-name argument in ~ (SETF FIND-CLASS)")) (let ((cell (find-class-cell name))) (setf (find-class-cell-class cell) new-value) (when (and (eq *boot-state* 'complete) (null new-value)) (setf (find-classoid name) nil)) (when (or (eq *boot-state* 'complete) (eq *boot-state* 'braid)) (when (and new-value (class-wrapper new-value) (class-predicate-name new-value)) (setf (find-class-cell-predicate cell) (fdefinition (class-predicate-name new-value)))) (update-ctors 'setf-find-class :class new-value :name name)) new-value)) (t (error "~S is not a legal class name." name)))) (/show "pcl/macros.lisp 230") (defun (setf find-class-predicate) (new-value symbol) (if (legal-class-name-p symbol) (setf (find-class-cell-predicate (find-class-cell symbol)) new-value) (error "~S is not a legal class name." symbol))) (defun find-wrapper (symbol) (class-wrapper (find-class symbol))) (/show "pcl/macros.lisp 241") (defmacro function-funcall (form &rest args) `(funcall (the function ,form) ,@args)) (defmacro function-apply (form &rest args) `(apply (the function ,form) ,@args)) (/show "pcl/macros.lisp 249") (defun get-setf-fun-name (name) `(setf ,name)) (defsetf slot-value set-slot-value) (/show "finished with pcl/macros.lisp")