Re: [boost] [Spirit] Creating a simple text format parser

Subject: Re: [boost] [Spirit] Creating a simple text format parser
From: Joel de Guzman (joel_at_[hidden])
Date: 2008-11-21 10:28:40

Kisso Bajslovski wrote:
> Hi,
> I'm trying to create a simple parser to format a text input, Spirit seems to
> fit the bill nicely for my needs, but I'm having a few problems. First of
> all while the documentation is rather large, it would be sweet with some
> more small examples for a few small but as different as possible grammars.
> There's some already hidden in the docs at various places, it would be sweet
> if there was a section in the manual with all the code examples gathered.
> 
> Anyway, on to my little problem. I'm trying to create a grammar which is
> fairly close to HTML in one regard, consider the following:
> 
> Some default text <font=Arial><color=FFFFFF>some white arial text</font>
> some white text with default font</color> some text with default settings
> 
> So basically I need to create a rule which when encountering a tag pushes it
> onto a stack, and later on pops it when the matching closing tag is found,
> clearing its states. I have got a bit into that part, even if I would love
> some suggestions on it still if anyone have done something similar in
> Spirit. But the real problem actually is with the text which isn't a tag. I
> use anychar_p for that at the moment to capture it with a simple semantic
> action. The problem is that anychar_p just retrieves a single character,
> when I'd like to actually get it in the form of a string instead. To render
> it 1 char at the time is highly inefficient. I could use some global string
> to which I accumulate the chars and then let the tags check it and render
> its contents, but that seems hackish at best. For a parser such as this, is
> there a better way perhaps?

You might want to post to Spirit's list:
https://lists.sourceforge.net/lists/listinfo/spirit-general

Regards,
-- 
Joel de Guzman
http://www.boostpro.com
http://spirit.sf.net