This is the mail archive of the guile@sourceware.cygnus.com mailing list for the Guile project.

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]

Re: Syntatic sugar and identifier permissivity

To: guile at sourceware dot cygnus dot com
Subject: Re: Syntatic sugar and identifier permissivity
From: Ole Myren Rohne <ole dot rohne at cern dot ch>
Date: 05 Apr 2000 10:59:29 +0200
References: <Pine.LNX.4.21.0004051005130.4669-100000@marvin.ida.ing.tu-bs.de>

Dirk Herrmann <dirk@ida.ing.tu-bs.de> writes:

> Thanks to the modified set!, such an inc! macro should be easy to write.

Very easy indeed:

(defmacro inc! (place . val)
 `(set! ,place (+ ,place ,(if (null? val) 1 (car val)))))

(defmacro dec! (place . val)
 `(set! ,place (- ,place ,(if (null? val) 1 (car val)))))

(see incf/decf in CL)

	Ole

Follow-Ups:
- Re: Syntatic sugar and identifier permissivity
  - From: Marius Vollmer

References:
- Re: Syntatic sugar and identifier permissivity
  - From: Dirk Herrmann

Index Nav:	[Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav:	[Date Prev] [Date Next]	[Thread Prev] [Thread Next]