Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling
 
PerlMonks  

Re^3: Parse::RecDescent grammar definition

by jethro (Monsignor)
on Mar 21, 2011 at 17:22 UTC ( #894584=note: print w/ replies, xml ) Need Help??


in reply to Re^2: Parse::RecDescent grammar definition
in thread Parse::RecDescent grammar definition

You are right, %item has either the Pre or Post matching part. But only in one case does it print anything!

Entry : Pre | Post { use Data::Dumper; print Dumper \%item;} # is equivalent to Entry : Pre Entry : Post { use Data::Dumper; print Dumper \%item; } # is equivalent to Entry : Post { use Data::Dumper; print Dumper \%item; } Entry : Pre # is NOT equivalent to Entry : Pre { use Data::Dumper; print Dumper \%item; } Entry : Post { use Data::Dumper; print Dumper \%item; }

And the last example is what you want


Comment on Re^3: Parse::RecDescent grammar definition
Download Code

Log In?
Username:
Password:

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://894584]
help
Chatterbox?
and the web crawler heard nothing...

How do I use this? | Other CB clients
Other Users?
Others cooling their heels in the Monastery: (7)
As of 2015-04-19 13:45 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    Who makes your decisions?







    Results (359 votes), past polls