following: ~{~&~4T~A~}
All options except ~{~A, ~}and :DOCUMENTATION can be used multiple
times."
- '((:nicknames "{package-name}*")
- (:size "<integer>")
+ '((:use "{package-name}*")
+ (:export "{symbol-name}*")
+ (:import-from "<package-name> {symbol-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}*")
- #!+sb-package-locks (:implement "{package-name}*")
+ (:local-nicknames "{local-nickname actual-package-name}*")
#!+sb-package-locks (:lock "boolean")
- (:documentation "doc-string"))
+ #!+sb-package-locks (:implement "{package-name}*")
+ (:documentation "doc-string")
+ (:intern "{symbol-name}*")
+ (:size "<integer>")
+ (:nicknames "{package-name}*"))
'(:size #!+sb-package-locks :lock))
(let ((nicknames nil)
+ (local-nicknames nil)
(size nil)
(shadows nil)
(shadowing-imports nil)
(case (car option)
(:nicknames
(setf nicknames (stringify-package-designators (cdr option))))
+ (:local-nicknames
+ (setf local-nicknames
+ (append local-nicknames
+ (mapcar (lambda (spec)
+ (destructuring-bind (nick name) spec
+ (cons (stringify-package-designator nick)
+ (stringify-package-designator name))))
+ (cdr option)))))
(:size
(cond (size
(error 'simple-program-error
`(eval-when (:compile-toplevel :load-toplevel :execute)
(%defpackage ,(stringify-string-designator package) ',nicknames ',size
',shadows ',shadowing-imports ',(if use-p use :default)
- ',imports ',interns ',exports ',implement ',lock ',doc
+ ',imports ',interns ',exports ',implement ',local-nicknames
+ ',lock ',doc
(sb!c:source-location)))))
(defun check-disjoint (&rest args)
(defun stringify-package-designators (package-designators)
(mapcar #'stringify-package-designator package-designators))
+(defun import-list-symbols (import-list)
+ (let ((symbols nil))
+ (dolist (import import-list symbols)
+ (destructuring-bind (package-name &rest symbol-names)
+ import
+ (let ((package (find-undeleted-package-or-lose package-name)))
+ (mapcar (lambda (name)
+ (push (find-or-make-symbol name package) symbols))
+ symbol-names))))))
+
+(defun use-list-packages (package package-designators)
+ (cond ((listp package-designators)
+ (mapcar #'find-undeleted-package-or-lose package-designators))
+ (package
+ ;; :default for an existing package means preserve the
+ ;; existing use list
+ (package-use-list package))
+ (t
+ ;; :default for a new package is the *default-package-use-list*
+ '#.*default-package-use-list*)))
+
+(defun update-package (package nicknames source-location
+ shadows shadowing-imports
+ use
+ imports interns
+ exports implement local-nicknames
+ lock doc-string)
+ (declare #!-sb-package-locks
+ (ignore implement lock))
+ (%enter-new-nicknames package nicknames)
+ ;; 1. :shadow and :shadowing-import-from
+ ;;
+ ;; shadows is a list of strings, shadowing-imports is a list of symbols.
+ (shadow shadows package)
+ (shadowing-import shadowing-imports package)
+ ;; 2. :use
+ ;;
+ ;; use is a list of package objects.
+ (use-package use package)
+ ;; 3. :import-from and :intern
+ ;;
+ ;; imports is a list of symbols. interns is a list of strings.
+ (import imports package)
+ (dolist (intern interns)
+ (intern intern package))
+ ;; 4. :export
+ ;;
+ ;; exports is a list of strings
+ (export (mapcar (lambda (symbol-name) (intern symbol-name package))
+ exports)
+ package)
+ ;; Everything was created: update metadata
+ (sb!c:with-source-location (source-location)
+ (setf (package-source-location package) source-location))
+ (setf (package-doc-string package) doc-string)
+ #!+sb-package-locks
+ (progn
+ ;; Handle packages this is an implementation package of
+ (dolist (p implement)
+ (add-implementation-package package p))
+ ;; Handle lock
+ (setf (package-lock package) lock))
+ ;; Local nicknames. Throw out the old ones.
+ (setf (package-%local-nicknames package) nil)
+ (dolist (spec local-nicknames)
+ (add-package-local-nickname (car spec) (cdr spec) package))
+ package)
+
+(declaim (type list *on-package-variance*))
+(defvar *on-package-variance* '(:warn t)
+ "Specifies behavior when redefining a package using DEFPACKAGE and the
+definition is in variance with the current state of the package.
+
+The value should be of the form:
+
+ (:WARN [T | packages-names] :ERROR [T | package-names])
+
+specifying which packages get which behaviour -- with T signifying the default unless
+otherwise specified. If default is not specified, :WARN is used.
+
+:WARN keeps as much state as possible and causes SBCL to signal a full warning.
+
+:ERROR causes SBCL to signal an error when the variant DEFPACKAGE form is executed,
+with restarts provided for user to specify what action should be taken.
+
+Example:
+
+ (setf *on-package-variance* '(:warn (:swank :swank-backend) :error t))
+
+specifies to signal a warning if SWANK package is in variance, and an error otherwise.")
+
+(defun note-package-variance (&rest args &key package &allow-other-keys)
+ (let ((pname (package-name package)))
+ (destructuring-bind (&key warn error) *on-package-variance*
+ (let ((what (cond ((and (listp error) (member pname error :test #'string=))
+ :error)
+ ((and (listp warn) (member pname warn :test #'string=))
+ :warn)
+ ((eq t error)
+ :error)
+ (t
+ :warn))))
+ (ecase what
+ (:error
+ (apply #'error 'sb!kernel::package-at-variance-error args))
+ (:warn
+ (apply #'warn 'sb!kernel::package-at-variance args)))))))
+
+(defun update-package-with-variance (package name nicknames source-location
+ shadows shadowing-imports
+ use
+ imports interns
+ exports
+ implement local-nicknames
+ lock doc-string)
+ (unless (string= (the string (package-name package)) name)
+ (error 'simple-package-error
+ :package name
+ :format-control "~A is a nickname for the package ~A"
+ :format-arguments (list name (package-name name))))
+ (let ((no-longer-shadowed
+ (set-difference (package-%shadowing-symbols package)
+ (append shadows shadowing-imports)
+ :test #'string=)))
+ (when no-longer-shadowed
+ (restart-case
+ (let ((*package* (find-package :keyword)))
+ (note-package-variance
+ :format-control "~A also shadows the following symbols:~% ~S"
+ :format-arguments (list name no-longer-shadowed)
+ :package package))
+ (drop-them ()
+ :report "Stop shadowing them by uninterning them."
+ (dolist (sym no-longer-shadowed)
+ (unintern sym package)))
+ (keep-them ()
+ :report "Keep shadowing them."))))
+ (let ((no-longer-used (set-difference (package-use-list package) use)))
+ (when no-longer-used
+ (restart-case
+ (note-package-variance
+ :format-control "~A also uses the following packages:~% ~A"
+ :format-arguments (list name (mapcar #'package-name no-longer-used))
+ :package package)
+ (drop-them ()
+ :report "Stop using them."
+ (unuse-package no-longer-used package))
+ (keep-them ()
+ :report "Keep using them."))))
+ (let (old-exports)
+ (do-external-symbols (s package)
+ (push s old-exports))
+ (let ((no-longer-exported (set-difference old-exports exports :test #'string=)))
+ (when no-longer-exported
+ (restart-case
+ (note-package-variance
+ :format-control "~A also exports the following symbols:~% ~S"
+ :format-arguments (list name no-longer-exported)
+ :package package)
+ (drop-them ()
+ :report "Unexport them."
+ (unexport no-longer-exported package))
+ (keep-them ()
+ :report "Keep exporting them.")))))
+ (let ((old-implements
+ (set-difference (package-implements-list package)
+ (mapcar #'find-undeleted-package-or-lose implement))))
+ (when old-implements
+ (restart-case
+ (note-package-variance
+ :format-control "~A is also an implementation package for:~% ~{~S~^~% ~}"
+ :format-arguments (list name old-implements)
+ :package package)
+ (drop-them ()
+ :report "Stop being an implementation package for them."
+ (dolist (p old-implements)
+ (remove-implementation-package package p)))
+ (keep-them ()
+ :report "Keep exporting them."))))
+ (update-package package nicknames source-location
+ shadows shadowing-imports
+ use imports interns exports
+ implement local-nicknames
+ lock doc-string))
(defun %defpackage (name nicknames size shadows shadowing-imports
- use imports interns exports implement lock doc-string
+ use imports interns exports implement local-nicknames
+ lock doc-string
source-location)
(declare (type simple-string name)
(type list nicknames shadows shadowing-imports
imports interns exports)
(type (or list (member :default)) use)
- (type (or simple-string null) doc-string)
- #!-sb-package-locks
- (ignore implement lock))
- (let ((package (or (find-package name)
- (progn
- (when (eq use :default)
- (setf use '#.*default-package-use-list*))
- (make-package name
- :use nil
- :internal-symbols (or size 10)
- :external-symbols (length exports))))))
- (sb!c:with-source-location (source-location)
- (setf (package-source-location package) source-location))
- (unless (string= (the string (package-name package)) name)
- (error 'simple-package-error
- :package name
- :format-control "~A is a nickname for the package ~A"
- :format-arguments (list name (package-name name))))
- (enter-new-nicknames package nicknames)
- ;; Handle shadows and shadowing-imports.
- (let ((old-shadows (package-%shadowing-symbols package)))
- (shadow shadows package)
- (dolist (sym-name shadows)
- (setf old-shadows (remove (find-symbol sym-name package) old-shadows)))
- (dolist (simports-from shadowing-imports)
- (let ((other-package (find-undeleted-package-or-lose
- (car simports-from))))
- (dolist (sym-name (cdr simports-from))
- (let ((sym (find-or-make-symbol sym-name other-package)))
- (shadowing-import sym package)
- (setf old-shadows (remove sym old-shadows))))))
- (when old-shadows
- (warn 'package-at-variance
- :format-control "~A also shadows the following symbols:~% ~S"
- :format-arguments (list name old-shadows))))
- ;; Handle USE.
- (unless (eq use :default)
- (let ((old-use-list (package-use-list package))
- (new-use-list (mapcar #'find-undeleted-package-or-lose use)))
- (use-package (set-difference new-use-list old-use-list) package)
- (let ((laterize (set-difference old-use-list new-use-list)))
- (when laterize
- (unuse-package laterize package)
- (warn 'package-at-variance
- :format-control "~A used to use the following packages:~% ~S"
- :format-arguments (list name laterize))))))
- ;; Handle IMPORT and INTERN.
- (dolist (sym-name interns)
- (intern sym-name package))
- (dolist (imports-from imports)
- (let ((other-package (find-undeleted-package-or-lose (car
- imports-from))))
- (dolist (sym-name (cdr imports-from))
- (import (list (find-or-make-symbol sym-name other-package))
- package))))
- ;; Handle exports.
- (let ((old-exports nil)
- (exports (mapcar (lambda (sym-name) (intern sym-name package))
- exports)))
- (do-external-symbols (sym package)
- (push sym old-exports))
- (export exports package)
- (let ((diff (set-difference old-exports exports)))
- (when diff
- (warn 'package-at-variance
- :format-control "~A also exports the following symbols:~% ~S"
- :format-arguments (list name diff)))))
- #!+sb-package-locks
- (progn
- ;; Handle packages this is an implementation package of
- (dolist (p implement)
- (add-implementation-package package p))
- ;; Handle lock
- (setf (package-lock package) lock))
- ;; Handle documentation.
- (setf (package-doc-string package) doc-string)
- package))
+ (type (or simple-string null) doc-string))
+ (with-package-graph ()
+ (let* ((existing-package (find-package name))
+ (use (use-list-packages existing-package use))
+ (shadowing-imports (import-list-symbols shadowing-imports))
+ (imports (import-list-symbols imports)))
+ (if existing-package
+ (update-package-with-variance existing-package name
+ nicknames source-location
+ shadows shadowing-imports
+ use imports interns exports
+ implement local-nicknames
+ lock doc-string)
+ (let ((package (make-package name
+ :use nil
+ :internal-symbols (or size 10)
+ :external-symbols (length exports))))
+ (update-package package
+ nicknames
+ source-location
+ shadows shadowing-imports
+ use imports interns exports
+ implement local-nicknames
+ lock doc-string))))))
(defun find-or-make-symbol (name package)
(multiple-value-bind (symbol how) (find-symbol name package)
projects / sbcl.git / blobdiff