Regexp::Grammars parser from scalar

nyaapa has asked for the wisdom of the Perl Monks concerning the following question:

Hi, monks

How can i generate a Regexp::Grammars parser from file/scalar?

I use

            my $str = "

                    ^ <$start_rule> \$

                    $rules
            ";
            my $link = bless(\$str, 'Regexp::Grammars::Precursor');
            $parser = qr{$link}ixs;
[download]

but i dont like this "hack"..

Update

It's ok to use

            my $str = "

                    ^ <$start_rule> \$

                    $rules
            ";
            $parser = qr{$link }ixs;
[download]

Comment on Regexp::Grammars parser from scalar Select or Download Code

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Re: Regexp::Grammars parser from scalar by jakeease (Friar) on May 10, 2013 at 04:01 UTC
There's lots of example code and explanation on CPAN: Regexp::Grammars Perhaps a little more about what you want to do?	[reply]
Re^2: Regexp::Grammars parser from scalar by nyaapa (Novice) on May 11, 2013 at 14:33 UTC
yep, it's true, but i cant use `my $regexp = qr{$pattern}ixs`, i need to write `my $regexp = qr{$pattern }ixs` because of caching there was a bug before version 1.028 with caching of post-translated regexes and because of it i thought that i cant use form like `$regexp = qr{ ^ <$rule> $ $rules }ixs;` [download] thanks however )	[reply] [d/l] [select]
Re: Regexp::Grammars parser from scalar by Anonymous Monk on May 11, 2013 at 08:44 UTC
basically what jakeease said, esp http://search.cpan.org/perldoc/Regexp::Grammars#Named_grammars For an example see inside Regexp::Grammars::Common::String - Some basic String parsing Rules for Regexp::Grammars See also RFC: A walkthrough from JSON ABNF to Regexp::Grammars	[reply]
Re^2: Regexp::Grammars parser from scalar by nyaapa (Novice) on May 11, 2013 at 14:37 UTC
thanks, i found that i couldn't use form like `my $str = " ^ <$start_rule> \$ $rules "; $parser = qr{$link }ixs;` [download] because of a bug :)	[reply] [d/l]