;;; -*- Mode: LISP; Syntax: Common-lisp; Base: 10; Package: (DEFPACKAGE :COLON-MODE :EXTERNAL) -*- ;;; ;;; THE BOEING COMPANY ;;; BOEING COMPUTER SERVICES ;;; RESEARCH AND TECHNOLOGY ;;; COMPUTER SCIENCE ;;; P.O. BOX 24346, MS 7L-64 ;;; SEATTLE, WA 98124-0346 ;;; ;;; ;;; Copyright (c) 1990, 1991 The Boeing Company, All Rights Reserved. ;;; ;;; Permission is granted to any individual or institution to use, ;;; copy, modify, and distribute this software, provided that this ;;; complete copyright and permission notice is maintained, intact, in ;;; all copies and supporting documentation and that modifications are ;;; appropriately documented with date, author and description of the ;;; change. ;;; ;;; Stephen L. Nicoud (snicoud@boeing.com) provides this software "as ;;; is" without express or implied warranty by him or The Boeing ;;; Company. ;;; ;;; This software is distributed in the hope that it will be useful, ;;; but WITHOUT ANY WARRANTY. No author or distributor accepts ;;; responsibility to anyone for the consequences of using it or for ;;; whether it serves any particular purpose or works at all. ;;; ;;; Author: Stephen L. Nicoud ;;; ;;; ----------------------------------------------------------------- ;;; ;;; Read-Time Conditionals used in this file. ;;; ;;; #+LISPM ;;; #+EXCL ;;; #+SYMBOLICS ;;; #+TI ;;; ;;; ----------------------------------------------------------------- ;;; ----------------------------------------------------------------- ;;; ;;; DEFPACKAGE - This files attempts to define a portable ;;; implementation for DEFPACKAGE, as defined in "Common LISP, The ;;; Language", by Guy L. Steele, Jr., Second Edition, 1990, Digital ;;; Press. ;;; ;;; Send comments, suggestions, and/or questions to: ;;; ;;; Stephen L Nicoud ;;; ;;; An early version of this file was tested in Symbolics Common ;;; Lisp (Genera 7.2 & 8.0 on a Symbolics 3650 Lisp Machine), ;;; Franz's Allegro Common Lisp (Release 3.1.13 on a Sun 4, SunOS ;;; 4.1), and Sun Common Lisp (Lucid Common Lisp 3.0.2 on a Sun 3, ;;; SunOS 4.1). ;;; ;;; 91/5/23 (SLN) - Since the initial testing, modifications have ;;; been made to reflect new understandings of what DEFPACKAGE ;;; should do. These new understandings are the result of ;;; discussions appearing on the X3J13 and Common Lisp mailing ;;; lists. Cursory testing was done on the modified version only ;;; in Allegro Common Lisp (Release 3.1.13 on a Sun 4, SunOS 4.1). ;;; ;;; ----------------------------------------------------------------- (lisp:in-package :DEFPACKAGE) (export '(defpackage)) (proclaim '(declaration values arglist)) ;#-gcl ;(eval-when (compile load eval) ; #-lispm ; (unless (member :loop *features*) ; (require :loop #+excl (merge-pathnames "loop" excl::*library-code-fasl-pathname*))) ; ; (unless (find-package :common-lisp) ; (rename-package :lisp :common-lisp (union '("CL" "LISP") (package-nicknames (find-package :lisp)) :test #'string=))) ; (unless (find-package :common-lisp-user) ; (rename-package :user :common-lisp-user (union '("CL-USER" "USER") (package-nicknames (find-package :user)) :test #'string=))) ; ; #+lispm ; (shadow (intern "DEFPACKAGE" #+symbolics :scl #+ti :ticl) 'defpackage) ; (proclaim '(declaration values arglist)) ; (export 'defpackage 'defpackage) ; ) (defmacro DEFPACKAGE (name &rest options) (declare (type (or symbol string) name) (arglist defined-package-name &rest options) (values package)) "DEFPACKAGE - DEFINED-PACKAGE-NAME {OPTION}* [Macro] This creates a new package, or modifies an existing one, whose name is DEFINED-PACKAGE-NAME. The DEFINED-PACKAGE-NAME may be a string or a symbol; if it is a symbol, only its print name matters, and not what package, if any, the symbol happens to be in. The newly created or modified package is returned as the value of the DEFPACKAGE form. Each standard OPTION is a list of keyword (the name of the option) and associated arguments. No part of a DEFPACKAGE form is evaluated. Except for the :SIZE and :DOCUMENTATION options, more than one option of the same kind may occur within the same DEFPACKAGE form. Valid Options: (:documentation string) (:size integer) (:nicknames {package-name}*) (:shadow {symbol-name}*) (:shadowing-import-from package-name {symbol-name}*) (:use {package-name}*) (:import-from package-name {symbol-name}*) (:intern {symbol-name}*) (:export {symbol-name}*) (:export-from {package-name}*) [Note: :EXPORT-FROM is an extension to DEFPACKAGE. If a symbol is interned in the package being created and if a symbol with the same print name appears as an external symbol of one of the packages in the :EXPORT-FROM option, then the symbol is exported from the package being created. :DOCUMENTATION is an extension to DEFPACKAGE. :SIZE is used only in Genera and Allegro.]" (loop for (option) in options unless (member option '(:documentation :size :nicknames :shadow :shadowing-import-from :use :import-from :intern :export :export-from)) do (cerror "Proceed, ignoring this option." "~s is not a valid DEFPACKAGE option." option)) (labels ((option-test (arg1 arg2) (when (consp arg2) (equal (car arg2) arg1))) (option-values-list (option options) (loop for result = (member option options ':test #'option-test) then (member option (rest result) ':test #'option-test) until (null result) when result collect (rest (first result)))) (option-values (option options) (loop for result = (member option options ':test #'option-test) then (member option (rest result) ':test #'option-test) until (null result) when result append (rest (first result))))) (loop for option in '(:size :documentation) when (<= 2 (count option options ':key #'car)) do (warn "DEFPACKAGE option ~s specified more than once. The first value \"~a\" will be used." option (first (option-values option options)))) (setq name (string name)) (let ((nicknames (mapcar #'string (option-values ':nicknames options))) (documentation (first (option-values ':documentation options))) (size (first (option-values ':size options))) (shadowed-symbol-names (mapcar #'string (option-values ':shadow options))) (interned-symbol-names (mapcar #'string (option-values ':intern options))) (exported-symbol-names (mapcar #'string (option-values ':export options))) (shadowing-imported-from-symbol-names-list (loop for list in (option-values-list ':shadowing-import-from options) collect (cons (string (first list)) (mapcar #'string (rest list))))) (imported-from-symbol-names-list (loop for list in (option-values-list ':import-from options) collect (cons (string (first list)) (mapcar #'string (rest list))))) (exported-from-package-names (mapcar #'string (option-values ':export-from options)))) (flet ((find-duplicates (&rest lists) (let (results) (loop for list in lists for more on (cdr lists) for i from 1 do (loop for elt in list as entry = (find elt results :key #'car :test #'string=) unless (member i entry) do (loop for l2 in more for j from (1+ i) do (if (member elt l2 :test #'string=) (if entry (nconc entry (list j)) (setq entry (car (push (list elt i j) results)))))))) results))) (loop for duplicate in (find-duplicates shadowed-symbol-names interned-symbol-names (loop for list in shadowing-imported-from-symbol-names-list append (rest list)) (loop for list in imported-from-symbol-names-list append (rest list))) do (error "The symbol ~s cannot coexist in these lists:~{ ~s~}" (first duplicate) (loop for num in (rest duplicate) collect (case num (1 ':SHADOW)(2 ':INTERN)(3 ':SHADOWING-IMPORT-FROM)(4 ':IMPORT-FROM))))) (loop for duplicate in (find-duplicates exported-symbol-names interned-symbol-names) do (error "The symbol ~s cannot coexist in these lists:~{ ~s~}" (first duplicate) (loop for num in (rest duplicate) collect (case num (1 ':EXPORT)(2 ':INTERN)))))) `(eval-when (load eval compile) (if (find-package ,name) (progn (rename-package ,name ,name) ,@(when nicknames `((rename-package ,name ,name ',nicknames))) #+(or symbolics excl) ,@(when size #+symbolics `((when (> ,size (pkg-max-number-of-symbols (find-package ,name))) (pkg-rehash (find-package ,name) ,size))) #+excl `((let ((tab (excl::package-internal-symbols (find-package ,name)))) (when (hash-table-p tab) (setf (excl::ha_rehash-size tab) ,size))))) ,@(when (not (null (member ':use options ':key #'car))) `((unuse-package (package-use-list (find-package ,name)) ,name)))) (make-package ,name ':use 'nil ':nicknames ',nicknames ,@(when size #+lispm `(:size ,size) #+excl `(:internal-symbols ,size)))) ,@(when documentation `((setf (get ',(intern name :keyword) #+excl 'excl::%package-documentation #-excl ':package-documentation) ,documentation))) (let ((*package* (find-package ,name))) ,@(when SHADOWed-symbol-names `((SHADOW (mapcar #'intern ',SHADOWed-symbol-names)))) ,@(when SHADOWING-IMPORTed-from-symbol-names-list (mapcar #'(lambda (list) `(SHADOWING-IMPORT (mapcar #'(lambda (symbol) (intern symbol ,(first list))) ',(rest list)))) SHADOWING-IMPORTed-from-symbol-names-list)) (USE-PACKAGE ',(or (mapcar #'string (option-values ':USE options)) "CL")) ,@(when IMPORTed-from-symbol-names-list (mapcar #'(lambda (list) `(IMPORT (mapcar #'(lambda (symbol) (intern symbol ,(first list))) ',(rest list)))) IMPORTed-from-symbol-names-list)) ,@(when INTERNed-symbol-names `((mapcar #'INTERN ',INTERNed-symbol-names))) ,@(when EXPORTed-symbol-names `((EXPORT (mapcar #'intern ',EXPORTed-symbol-names)))) ,@(when EXPORTed-from-package-names `((dolist (package ',EXPORTed-from-package-names) (do-external-symbols (symbol (find-package package)) (when (nth 1 (multiple-value-list (find-symbol (string symbol)))) (EXPORT (list (intern (string symbol))))))))) ) (find-package ,name))))) ;#+excl ;(excl::defadvice cl:documentation (look-for-package-type :around) ; (let ((symbol (first excl::arglist)) ; (type (second excl::arglist))) ; (if (or (eq ':package (intern (string type) :keyword)) ; (eq ':defpackage (intern (string type) :keyword))) ; (or (get symbol 'excl::%package-documentation) ; (get (intern (string symbol) :keyword) 'excl::%package-documentation)) ; (values :do-it)))) ;#+symbolics ;(scl::advise cl:documentation :around look-for-package-type nil ; (let ((symbol (first scl::arglist)) ; (type (second scl::arglist))) ; (if (or (eq ':package (intern (string type) :keyword)) ; (eq ':defpackage (intern (string type) :keyword))) ; (or (get symbol ':package-documentation) ; (get (intern (string symbol) :keyword) ':package-documentation)) ; (values :do-it)))) (provide :defpackage) (pushnew :defpackage *features*) (eval-when (load) (in-package "USER") (unintern 'defpackage 'user) (use-package "DEFPACKAGE")) ;;;; ------------------------------------------------------------ ;;;; End of File ;;;; ------------------------------------------------------------