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Re: [Chicken-users] Handling unstandard reader macros.
From: |
felix winkelmann |
Subject: |
Re: [Chicken-users] Handling unstandard reader macros. |
Date: |
Thu, 24 Nov 2005 08:17:54 +0100 |
On 11/24/05, Pupeno <address@hidden> wrote:
> On Wednesday 23 November 2005 03:37, felix winkelmann wrote:
> > On 11/23/05, Pupeno <address@hidden> wrote:
> > > > Sorry, what kind of procedures are that?
> > >
> > > The procedure that is set by set-read-syntax![1].
> >
> > Just return the value that is whatever your reader-procedure
> > wants the read datum to be.
> It doesn't want it to be anything, I am ignoring any extension, I am only
> looking for includes.
>
> > > [1] In my case:
> > > (set-read-syntax! #\#
> >
> > ...
> >
> > Here you are overriding all #... read syntax. You want to use
> > `set-dispatch-read-syntax!' instead (which allows you to
> > add/redefine #... syntax without stomping over everything
> > already available.
>
> Ok, I changed to set-dispatch-read-syntax!, still, I need to implement cases
> for such basic things as characters: #\d.
> --
Then you must been doing something wrong...
(set-dispatch-read-syntax!
#\>
(lambda (p)
(let loop ()
(let ((c (read-char p)))
(cond ((eof-object? c) (error "unexpected end of file"))
((char=? c #\<)
(if (char=? #\# (read-char p))
#f
(loop)))
(else (loop)))))))
(pp (with-input-from-string "(1 2 #\\d #t)" read))
(pp (with-input-from-string "#> ... nothing ... <#" read))
cheers,
felix
- Re: [Chicken-users] Handling unstandard reader macros., (continued)
- Re: [Chicken-users] Handling unstandard reader macros., felix winkelmann, 2005/11/20
- Re: [Chicken-users] Handling unstandard reader macros., Pupeno, 2005/11/21
- Re: [Chicken-users] Handling unstandard reader macros., felix winkelmann, 2005/11/22
- Re: [Chicken-users] Handling unstandard reader macros., Pupeno, 2005/11/22
- Re: [Chicken-users] Handling unstandard reader macros., felix winkelmann, 2005/11/23
- Re: [Chicken-users] Handling unstandard reader macros., Pupeno, 2005/11/23
- Re: [Chicken-users] Handling unstandard reader macros.,
felix winkelmann <=
- Re: [Chicken-users] Handling unstandard reader macros., Pupeno, 2005/11/24
- Re: [Chicken-users] Handling unstandard reader macros., felix winkelmann, 2005/11/24
- Re: [Chicken-users] Handling unstandard reader macros., Zbigniew, 2005/11/24
- Re: [Chicken-users] Handling unstandard reader macros., Pupeno, 2005/11/24
- Re: [Chicken-users] Handling unstandard reader macros., Zbigniew, 2005/11/24
- Re: [Chicken-users] Handling unstandard reader macros., felix winkelmann, 2005/11/25
Re: [Chicken-users] Handling unstandard reader macros., Thomas Chust, 2005/11/17