From: "Pascal J. Bourguignon" <pjb@informatimago.com>
To: help-gnu-emacs@gnu.org
Subject: Re: How the backquote and the comma really work?
Date: Sun, 23 Aug 2015 18:46:07 +0200 [thread overview]
Message-ID: <87bndy6jhs.fsf@kuiper.lan.informatimago.com> (raw)
In-Reply-To: mailman.110.1440318650.11330.help-gnu-emacs@gnu.org
Marcin Borkowski <mbork@mbork.pl> writes:
> On 2015-08-12, at 18:30, Pascal J. Bourguignon <pjb@informatimago.com> wrote:
>
>> Michael Heerdegen <michael_heerdegen@web.de> writes:
>>
>>> Marcin Borkowski <mbork@mbork.pl> writes:
>>>
>>>> Interestingly, there's a lot of buzz about Lisp /interpreter/ written
>>>> in Lisp, but not so much about Lisp /reader/ written in Lisp. In
>>>> fact, I didn't find one on the Internet.
>>
>> Not looking good enough.
>>
>> https://gitlab.com/com-informatimago/com-informatimago/tree/master/common-lisp/lisp-reader
>
> Thanks!
>
>> and of course, there's one in each lisp implementation.
>
> But often in C or something, not in Lisp.
Nope. Only clisp and ecl have a lisp reader written in C. All the
other implementations have it in lisp (or perhaps java).
> And most probably I'll end up coding an abstraction like this, with
> a function for looking at the next token without “consuming” it, and
> a function for “popping” the next token. Converting between buffers and
> streams wouldn’t be very useful for me, since I would either lose the
> whole text structure (line-breaks, comments), or have to do a lot of
> work to actually preserve it.
Not necessarily. Just add the required information to your token
structure, and you can also intersperse pseudo tokens for line-breaks
and comments, (but this renders the grammar more hairy, since you have
to allow for them between any other token; instead, you can just filter
them out before the actual parsing).
> OTOH, here I walk an Emacs buffer and not an external file. Moreover,
> as I said, I don’t want to lose info on where I am in the source.
In this case, you already have the whole source in memory…
--
__Pascal Bourguignon__ http://www.informatimago.com/
“The factory of the future will have only two employees, a man and a
dog. The man will be there to feed the dog. The dog will be there to
keep the man from touching the equipment.” -- Carl Bass CEO Autodesk
next prev parent reply other threads:[~2015-08-23 16:46 UTC|newest]
Thread overview: 44+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-25 17:09 How the backquote and the comma really work? Marcin Borkowski
2015-06-25 17:33 ` Michael Heerdegen
2015-06-25 18:06 ` Marcin Borkowski
2015-06-25 18:22 ` Michael Heerdegen
2015-06-25 18:39 ` Marcin Borkowski
2015-06-25 18:44 ` Marcin Borkowski
2015-06-25 19:06 ` Michael Heerdegen
2015-07-10 11:36 ` Marcin Borkowski
2015-07-12 15:54 ` Michael Heerdegen
2015-07-12 19:55 ` Marcin Borkowski
2015-07-12 20:33 ` Marcin Borkowski
2015-07-14 18:17 ` Marcin Borkowski
2015-07-14 22:08 ` Emanuel Berg
2015-07-21 22:08 ` Michael Heerdegen
2015-07-24 13:01 ` Michael Heerdegen
2015-08-11 11:41 ` Marcin Borkowski
2015-08-12 15:29 ` Michael Heerdegen
[not found] ` <mailman.8207.1439393377.904.help-gnu-emacs@gnu.org>
2015-08-12 16:30 ` Pascal J. Bourguignon
2015-08-23 8:30 ` Marcin Borkowski
[not found] ` <mailman.110.1440318650.11330.help-gnu-emacs@gnu.org>
2015-08-23 16:46 ` Pascal J. Bourguignon [this message]
2015-07-21 21:54 ` Michael Heerdegen
2015-08-11 10:15 ` Marcin Borkowski
2015-08-11 17:20 ` Thorsten Jolitz
2015-08-12 15:01 ` Michael Heerdegen
2015-07-21 21:50 ` Michael Heerdegen
2015-06-25 18:10 ` Drew Adams
2015-06-25 18:40 ` Michael Heerdegen
2015-06-25 18:53 ` Marcin Borkowski
2015-06-25 19:39 ` Michael Heerdegen
2015-06-25 20:05 ` Drew Adams
2015-06-25 20:18 ` Marcin Borkowski
2015-06-25 20:37 ` Drew Adams
2015-06-25 23:55 ` Robert Thorpe
[not found] ` <mailman.5697.1435276533.904.help-gnu-emacs@gnu.org>
2015-06-26 1:41 ` Rusi
2015-06-26 14:24 ` Michael Heerdegen
[not found] ` <mailman.5716.1435328741.904.help-gnu-emacs@gnu.org>
2015-06-26 14:35 ` Rusi
2015-06-26 14:51 ` Michael Heerdegen
2015-06-25 18:46 ` Marcin Borkowski
2015-06-26 7:31 ` tomas
2015-06-26 13:48 ` Drew Adams
2015-06-26 14:06 ` tomas
2015-06-26 15:06 ` Emanuel Berg
2015-07-12 17:38 ` Vaidheeswaran C
[not found] <mailman.5657.1435252169.904.help-gnu-emacs@gnu.org>
2015-06-30 16:27 ` sokobania.01
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