+(defun stringify-string-designators (string-designators)
+ (mapcar #'stringify-string-designator string-designators))
+
+(defun stringify-package-designator (package-designator)
+ (typecase package-designator
+ (simple-string package-designator)
+ (string (coerce package-designator 'simple-string))
+ (symbol (symbol-name package-designator))
+ (character (string package-designator))
+ (package (package-name package-designator))
+ (t
+ (error "~S does not designate a package" package-designator))))
+
+(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 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))
+ package)
+
+(defun update-package-with-variance (package name nicknames source-location
+ shadows shadowing-imports
+ use
+ imports interns
+ exports
+ implement lock doc-string)
+ (let ((old-exports nil)
+ (old-shadows (package-%shadowing-symbols package))
+ (old-use (package-use-list package))
+ (no-longer-used nil))
+ (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))))
+ (do-external-symbols (symbol package)
+ (push symbol old-exports))
+ (setf old-shadows (set-difference old-shadows (append shadows
+ shadowing-imports)
+ :test #'string=))
+ (setf no-longer-used (set-difference old-use use))
+ (setf use (set-difference use old-use))
+ (setf old-exports (set-difference old-exports exports :test #'string=))
+ (when old-shadows
+ (warn 'package-at-variance
+ :format-control "~A also shadows the following symbols:~% ~S"
+ :format-arguments (list name old-shadows)))
+ (when no-longer-used
+ (dolist (unused-package no-longer-used)
+ (unuse-package unused-package package))
+ (warn 'package-at-variance
+ :format-control "~A used to use the following packages:~% ~S"
+ :format-arguments (list name no-longer-used)))
+ (when old-exports
+ (warn 'package-at-variance
+ :format-control "~A also exports the following symbols:~% ~S"
+ :format-arguments (list name old-exports)))
+ (update-package package nicknames source-location
+ shadows shadowing-imports
+ use imports interns exports
+ implement lock doc-string)))