This commit was manufactured by cvs2svn to create branch

[elisp/flim.git] / closure.el

diff --git a/closure.el b/closure.el
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index 8220628..0000000
--- a/closure.el
+++ /dev/null
@@ -1,66 +0,0 @@
-(provide 'closure)
-
-;; closure is one of following forms.
-;;  FUNCTION
-;;  (WRAPPER FUNCTION FV1 . FVS)
-;;  (PARTIAL-ARGS CLOSURE)
-
-(defmacro closure-make (fun &rest fvs)
-  "Make a closure from a function FUN and free variables FVS.
-CAUTION: Do not assign to free variables."
-  (if (null fvs)
-      fun
-    (let* ((funv (make-symbol "funv"))
-          (args (make-symbol "args")))
-      `(list
-       (lambda (,funv ,args ,@fvs)
-         (apply ,funv ,args))
-       ,fun
-       ,@fvs))))
-
-(defmacro closure-partial-call (clo &rest args)
-  "Call partially."
-  `(list (list ,@args) ,clo))
-
-(defun closure-call (clo &rest args)
-  "Call closure."
-  (while
-      (and
-       (not (functionp clo))
-       (if (cddr clo)
-          (progn
-            (setq args (cons (cadr clo) (cons args (cddr clo)))
-                  clo (car clo))
-            nil)
-        t))
-    (setq args (append (car clo) args)
-         clo (cadr clo)))
-  (apply clo args))
-
-(defun closure-compose (c1 c2)
-  "Compose C1 and C2.
-
-If either C1 or C2 is nil, another one is returned.
-If C1 and C2 is non-nil, C1 must be closure with one argument."
-  (cond
-   ((null c1) c2)
-   ((null c2) c1)
-   (t
-    (closure-make
-     (lambda (&rest args)
-       (closure-call c1 (apply 'closure-call c2 args)))
-     c1 c2))))
-
-'(
-
-(setq c1 (let ((a 1)) (closure-make (lambda (b) (+ a b)) a)))
-(closure-call c1 2) ; => 3
-
-(let ((a 1)) (setq plus1 (closure-make (lambda (b) (+ a b)) a)))
-(let ((a 2)) (setq plus2 (closure-make (lambda (b) (+ a b)) a)))
-(setq plus3 (closure-compose plus1 plus2))
-(closure-call plus3 4) ; => 7
-
-(closure-call (closure-partial-call (closure-partial-call '+ 1 2 3) 4 5 6) 7 8 9) ;=> 45
-
-)
\ No newline at end of file