Re: [Spirit-general] Problem with Parsing

From: sps22 (sps22_at_[hidden])
Date: 2003-08-01 12:55:47

That explains it, but not fully. I was using *(anychar_p) just for 
seeing whether my parser gets the two braces or not. When I did:

FILE >> LEFT_BRACE >> RIGHT_BRACE

It did not parse either the input file: 

"file {  }"

-Surinder

--- In Boost-Users_at_[hidden], Dave Gomboc <dave_at_c...> wrote:
> *(anychar_p) will grab characters until the cows comes home (e.g. 
you run
> out of input).  You need to remove RIGHT_BRACE from the set of 
characters
> that it will accept.  I don't recall the exact syntax but it will 
be in the
> docs somewhere, basically it looks like a subtraction.
> 
> Dave
> 
> 
> ----- Original Message ----- 
> From: "sps22" <sps22_at_y...>
> To: <Boost-Users_at_[hidden]>
> Sent: Friday, August 01, 2003 11:03 AM
> Subject: [Boost-Users] Re: [Spirit-general] Problem with Parsing
> 
> 
> > Joel:
> >
> > On your suggestion, I used the debugging and found that if I 
replace
> >
> > FILE >> LEFT_BRACE >> *(anychar_p) >> RIGHT_BRACE
> >
> > by a real rule like
> >
> > FILE >> LEFT_BRACE >> A_REAL_RULE >> RIGHT_BRACE
> >
> > then it works OK. What was strange was that the debugger indicated
> > that the entire input file was consumed by the first original code
> > and all that was left was "" and it still said parser failed. Any
> > insight into it?
> >
> > Thanks.
> > -Surinder
> > PS: Could not post the response to the Spirit mailing list.
> >
> >
> > --- In Boost-Users_at_[hidden], "Joel de Guzman" <djowel_at_g...>
> > wrote:
> > > Hi,
> > >
> > > Have you tried using the Spirit debugger?
> > >
> > > Cheers,
> > > -- 
> > > Joel de Guzman
> > > joel at boost-consulting.com
> > > http://www.boost-consulting.com
> > > http://spirit.sf.net
> > >
> > > Surinder Pal Singh <sps22_at_y...> wrote:
> > > > Hi,
> > > > I am trying to use Spirit (in the latest Boost 1_30_0)
> > > > for a project. I want to parse a file whose structure
> > > > is the following:
> > > >
> > > > section1 {
> > > >   something;
> > > > }
> > > >
> > > > I am using the file_iterator to iterate on the input
> > > > file and then define comment as well as the grammar. I
> > > > am at my wits end why my parser keeps failing. (When
> > > > this simple grammar works, I want to make the parser
> > > > more complex.) My code is attached below. (Note: I
> > > > used the example in the distribution c_grammar.cpp as
> > > > the starting point for it.)
> > > >
> > > > Thanks.
> > > >
> > > > -surinder
> > > >  I have attempted to join the spirit mail list, but
> > > > have not received the confirmation so far, but please
> > > > feel free to respond to me at: sps22_at_yahoo_dot_com
> > > >
> > > >
> > > > PS: This input file structure is going to be, of
> > > > course, more complicated than the example shown above.
> > > > Inside the setions, I would like to pass on flags and
> > > > statements to the code. If it is better for me to use
> > > > another approach to parse this file structure, please
> > > > suggest me.
> > > >
> > > [snip]
> >
> >
> >
> > Info: <http://www.boost.org>
> > Wiki: <http://www.crystalclearsoftware.com/cgi-
bin/boost_wiki/wiki.pl>
> > Unsubscribe: <mailto:boost-users-unsubscribe_at_[hidden]>
> >
> >
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http://docs.yahoo.com/info/terms/
> >
> >