+++ /dev/null
-(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
+++ /dev/null
-;;; tram.el --- basic session framework for internet protocols
-
-;; Copyright (C) 2000 Daiki Ueno
-
-;; Author: Daiki Ueno <ueno@unixuser.org>
-;; Created: 2000/08/14
-
-;; This file is part of FLIM (Faithful Library about Internet Message).
-
-;; This program is free software; you can redistribute it and/or
-;; modify it under the terms of the GNU General Public License as
-;; published by the Free Software Foundation; either version 2, or (at
-;; your option) any later version.
-
-;; This program is distributed in the hope that it will be useful, but
-;; WITHOUT ANY WARRANTY; without even the implied warranty of
-;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-;; General Public License for more details.
-
-;; You should have received a copy of the GNU General Public License
-;; along with this program; see the file COPYING. If not, write to the
-;; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
-;; Boston, MA 02111-1307, USA.
-
-
-;;; Commentary:
-;;
-
-;;; Code:
-
-(require 'luna)
-(require 'closure)
-
-(eval-when-compile (require 'cl))
-
-(eval-and-compile
- (luna-define-class tram-stream ())
-
- (luna-define-internal-accessors 'tram-stream))
-
-(luna-define-generic tram-stream-error-name (stream)
- "Return error symbol of the STREAM.")
-
-(luna-define-generic tram-stream-error (stream error)
- "Throw an ERROR of the STREAM.")
-
-(luna-define-method tram-stream-error-name ((stream tram-stream))
- (intern (format "%s-error" (luna-class-name stream))))
-
-(luna-define-method tram-stream-error ((stream tram-stream) error)
- (throw (tram-stream-error-name stream) error))
-
-(put '&& 'tram-compose-function #'tram-compose-&&)
-(put '|| 'tram-compose-function #'tram-compose-||)
-
-(defun tram-compose-&& (left right)
- "Multiplicative combinator which composes LEFT and RIGHT operations."
- `(lambda (stream)
- (let ((next
- ,(if (functionp left)
- `(closure-call #',left stream)
- `(closure-call ',left stream))))
- ,(if (functionp right)
- `(closure-call #',right next)
- `(closure-call ',right next)))))
-
-(defun tram-compose-|| (left right)
- "Additive combinator which composes LEFT and RIGHT operations."
- `(lambda (stream)
- (let (next error)
- (setq error
- (catch (tram-stream-error-name stream)
- (setq next
- ,(if (functionp left)
- `(closure-call #',left stream)
- `(closure-call ',left stream)))
- nil))
- (if error
- ,(if (functionp right)
- `(closure-call #',right next)
- `(closure-call ',right next))
- next))))
-
-(defun tram-fold-left (function accu sequence)
- "Apply FUNCTION to ACCU while folding SEQUENCE from left to right."
- (if (null sequence)
- accu
- (tram-fold-left
- function (funcall function accu (car sequence))
- (cdr sequence))))
-
-;;;###autoload
-(defmacro tram-define-transaction (name tram-transaction &optional doc)
- "Set NAME the compiled code of TRAM-TRANSACTION."
- `(let ((transaction
- ,(tram-compose-transaction (eval tram-transaction))))
- (defconst ,name transaction ,doc)))
-
-;;;###autoload
-(defun tram-compose-transaction (tram-transaction)
- "Compose transaction-function from TRAM-TRANSACTION."
- (if (not (symbolp (car tram-transaction)))
- tram-transaction
- (let ((combinator
- (get (pop tram-transaction) 'tram-compose-function)))
- (or combinator
- (error "Unknown operator"))
- (tram-fold-left
- `(lambda (accu c)
- (funcall
- #',combinator accu
- (if (listp c)
- (tram-compose-transaction c)
- c)))
- (if (listp (car tram-transaction))
- (tram-compose-transaction (pop tram-transaction))
- (pop tram-transaction))
- tram-transaction))))
-
-(provide 'tram)
-
-;;; tram.el ends here