From: "Randy Brukardt" <randy@rrsoftware.com>
Subject: Re: Parser interface design
Date: Tue, 12 Apr 2011 16:54:24 -0500
Date: 2011-04-12T16:54:24-05:00 [thread overview]
Message-ID: <io2hmk$nmt$1@munin.nbi.dk> (raw)
In-Reply-To: 1ovsbvdul64pw$.1q49g3o7n296m$.dlg@40tude.net
"Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de> wrote in message
news:1ovsbvdul64pw$.1q49g3o7n296m$.dlg@40tude.net...
> On Tue, 12 Apr 2011 16:13:30 +0000 (UTC), Natasha Kerensikova wrote:
>
>> On 2011-04-08, Simon Wright <simon@pushface.org> wrote:
>
>>> In other words, HTML.Emphasize ("bar") would return "<b>bar</b>", but
>>> No_Op ("bar") would just return "bar".
>>
>> And that's exactly why disabling emphasis should be done on the parser
>> level: the callback only has the semantic information ("render bar
>> emphasized") without any knowledge of how it was obtained (the source
>> could have been "foo *bar* baz" or "foo _bar_ baz"). Therefore no
>> callback can reconstruct the intact input.
>
> That looks wrong to me. I think that obvious design is to move it to the
> renderer:
>
> HTML.Emphasize ("bar") -> "<b>bar</b>"
> ASCII.Emphasize ("bar") -> "*bar*"
> Plain_Text.Emphasize ("bar") -> "bar"
> Gtk_Text_Buffer.Emphasize ("bar") -> sets tags around the text slice
> ...
>
> Parser just calls On_Emphasize, the implementation of routes it to the
> renderer's Emphasize, which figures out what to do.
Right, that's how it works in the Ada standard formatter tool. The output
class takes a high-level representation of items and then writes them
appropriately for the desired output.
Randy.
next prev parent reply other threads:[~2011-04-12 21:54 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-06 10:11 Parser interface design Natasha Kerensikova
2011-04-06 12:17 ` Georg Bauhaus
2011-04-07 18:56 ` Natasha Kerensikova
2011-04-08 11:49 ` Stephen Leake
2011-04-06 12:20 ` Dmitry A. Kazakov
2011-04-07 19:14 ` Natasha Kerensikova
2011-04-07 20:31 ` Dmitry A. Kazakov
2011-04-08 13:51 ` Natasha Kerensikova
2011-04-08 14:21 ` Dmitry A. Kazakov
2011-04-12 15:58 ` Natasha Kerensikova
2011-04-12 17:14 ` Dmitry A. Kazakov
2011-04-06 15:51 ` Georg Bauhaus
2011-04-07 19:44 ` Natasha Kerensikova
2011-04-07 20:52 ` Dmitry A. Kazakov
2011-04-07 22:09 ` Simon Wright
2011-04-08 14:03 ` Natasha Kerensikova
2011-04-08 19:06 ` Jeffrey Carter
2011-04-08 19:59 ` Simon Wright
2011-04-12 16:13 ` Natasha Kerensikova
2011-04-12 17:22 ` Dmitry A. Kazakov
2011-04-12 19:02 ` Simon Wright
2011-04-13 8:20 ` Natasha Kerensikova
2011-04-13 8:37 ` Dmitry A. Kazakov
2011-04-13 11:06 ` Georg Bauhaus
2011-04-13 12:46 ` Dmitry A. Kazakov
2011-04-13 22:33 ` Randy Brukardt
2011-04-14 6:55 ` Natasha Kerensikova
2011-04-15 0:22 ` Randy Brukardt
2011-04-12 21:54 ` Randy Brukardt [this message]
2011-04-07 22:13 ` Georg Bauhaus
2011-04-08 15:30 ` Natasha Kerensikova
2011-04-07 0:36 ` Randy Brukardt
2011-04-08 11:16 ` Brian Drummond
2011-04-19 9:08 ` Natasha Kerensikova
2011-04-19 12:35 ` Ludovic Brenta
2011-04-20 10:44 ` Brian Drummond
2011-04-19 17:28 ` Jeffrey Carter
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