[boost] Re: Spirit grammar definition

From: Jeff Flinn (TriumphSprint2000_at_[hidden])
Date: 2004-07-19 15:22:38

"Nico Massi" <desertswat_at_[hidden]> wrote in message
news:opsbebwvw8yic797_at_swat...
> Hi,
>
> I have a problem with a spirit parser.
> My grammar/skipgrammer and its definition are working,
> but only on the first spirit::parse() call.
>
> My function around parse() looks like this.
>
> void function()
> {
> string str;
> file.open();
> file >> str;
> file.close();
> vector<string> library;
> vector<Group> groups;
>
> MyGrammar g( library, groups );
> MySkipGrammar s();
> boost::spirit::parse( str, g, s );
>
> // library and groups are now filled properly
> setLibrary( library );
> setGroups( groups );
> }
>
>
> This works fine, as long as i call function() only one time.
> The second time i call the function ( even if the parse data(str) is the
> same ),
> the parse() function failes with a memory error ( access to 0xcccccccc
> ( MSVCs default debug value ) )
>
> I have tried to debug it and found the following.
> It seems that in the second call, the inner class(definition) of MyGrammer
> is still referencing the old data.
> And the first access in one rule actor to library or groups failes with
> memory access to 0xcccccccc.

Without seeing MyGrammar and MySkipGrammar your not likely to get much help.
Post a stripped down to the minimally complete/compilable code sample. Also
you might want to post on the spirit mailing lists.

Jeff F