(defun cdr (x) (cdr x))
+(defun rplaca (cons x)
+ (rplaca cons x))
+
+(defun rplacd (cons x)
+ (rplacd cons x))
+
(defun first (x) (car x))
(defun second (x) (cadr x))
(defun third (x) (caddr x))
(when (member (funcall key x) list2 :test test :key key)
(push x new-list)))
new-list))
+
+(defun get-properties (plist indicator-list)
+ (do* ((plist plist (cddr plist))
+ (cdr (cdr plist) (cdr plist))
+ (car (car plist) (car plist)))
+ ((null plist) (values nil nil nil))
+ (when (null cdr)
+ (error "malformed property list ~S" plist))
+ (let ((found (member car indicator-list :test #'eq)))
+ (when found
+ (return (values car (cadr plist) plist))))))
+
+(defun getf (plist indicator &optional default)
+ (do* ((plist plist (cddr plist))
+ (cdr (cdr plist) (cdr plist))
+ (car (car plist) (car plist)))
+ ((null plist) default)
+ (when (null cdr)
+ (error "malformed property list ~S" plist))
+ (when (eq indicator car)
+ (return (cadr plist)))))
+
+(defun %putf (plist indicator new-value)
+ (do* ((tail plist (cddr tail))
+ (cdr (cdr tail) (cdr tail))
+ (car (car tail) (car tail)))
+ ((null tail) (list* indicator new-value plist))
+ (when (null cdr)
+ (error "malformed property list ~S" tail))
+ (when (eq indicator car)
+ ;; TODO: should be cadr, needs a defsetf for that
+ (setf (car (cdr tail)) new-value)
+ (return tail))))
+
+(define-setf-expander getf (plist indicator &optional default)
+ (multiple-value-bind (dummies vals newval setter getter)
+ (get-setf-expansion plist)
+ (let ((store (gensym))
+ (indicator-sym (gensym))
+ (default-sym (and default (gensym))))
+ (values `(,indicator-sym ,@(and default `(,default-sym)) ,@dummies)
+ `(,indicator ,@(and default `(,default)) ,@vals)
+ `(,store)
+ `(let ((,(car newval) (%putf ,getter ,indicator-sym ,store))
+ ,@(cdr newval))
+ ,setter
+ ,store)
+ `(getf ,getter ,indicator-sym ,@(and default `(,default-sym)))))))
(defun list-all-packages ()
(copy-list *package-list*))
-(defun make-package (name &key use)
- (let ((package (new))
- (use (mapcar #'find-package-or-fail use)))
+(defun %make-package (name use)
+ (let ((package (new)))
(setf (oget package "packageName") name)
(setf (oget package "symbols") (new))
(setf (oget package "exports") (new))
(push package *package-list*)
package))
+(defun resolve-package-list (packages)
+ (let (result)
+ (dolist (package (mapcar #'find-package-or-fail packages))
+ (pushnew package result :test #'eq))
+ (reverse result)))
+
+(defun make-package (name &key use)
+ (%make-package
+ (string name)
+ (resolve-package-list use)))
+
(defun packagep (x)
(and (objectp x) (in "symbols" x)))
`(eval-when (:compile-toplevel :load-toplevel :execute)
(setq *package* (find-package-or-fail ',string-designator))))
+(defmacro defpackage (package &rest options)
+ (let (use)
+ (dolist (option options)
+ (ecase (car option)
+ (:use
+ (setf use (append use (cdr option))))))
+ `(eval-when (:compile-toplevel :load-toplevel :execute)
+ (%defpackage ',(string package) ',use))))
+
+(defun redefine-package (package use)
+ (setf (oget package "use") use)
+ package)
+
+(defun %defpackage (name use)
+ (let ((package (find-package name))
+ (use (resolve-package-list use)))
+ (if package
+ (redefine-package package use)
+ (%make-package name use))))
+
;; This function is used internally to initialize the CL package
;; with the symbols built during bootstrap.
(defun %intern-symbol (symbol)
(test (let (foo)
(mapc (lambda (x y z) (push (+ x y z) foo)) '(1 2) '(3) '(4 5 6))
(equal foo '(8))))
+
+;; GETF
+(test (eq (getf '(a b c d) 'a) 'b))
+(test (null (getf '(a b c d) 'e)))
+(test (equal (let ((x (list 'a 1))) (setf (getf x 'a) 3) x) '(a 3)))
+(test (equal (let ((x (list 'a 1))) (incf (getf x 'a)) x) '(a 2)))
+
+;; GET-PROPERTIES
+(test (equal (multiple-value-list (get-properties '(a b c d) '(b d e))) '(NIL NIL NIL)))
+(test (equal (multiple-value-list (get-properties '(a b c d) '(b a c))) '(a b (a b c d))))
+(test (equal (multiple-value-list (get-properties '(a b c d) '(b c a))) '(a b (a b c d))))