Beefy Boxes and Bandwidth Generously Provided by pair Networks
The stupid question is the question not asked

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
It's been a few years since I used Parse::RecDescent, so it might be that my expectations are wrong, but I was under the impression that once some text had matched a rule, that same text would not be used to match a subsequent rule.

Excluding the actions that I take (printing the result) and the subrules (which are all regexes), the relationship between the rules is this:

start : (index pre risk) | (pre risk) risk : (risk1 | risk2) index : (pre1 | pre2 | pre3) pre : (pre1 | pre2 | pre3)
Most of my test cases match the 'index pre risk' pattern, often using the same pre# rule for both the index and pre matches. However, in 8 out of my 100 cases, the index and pre match are matching exactly the same line (as seen in both the output and $thisline).

Perhaps someone more familiar with P::RD could tell me if this is something they've seen before, and how I might prevent it.

Update: I do have a minimal test case, but because the sample data file is so large I don't want to attach it to this post.

In reply to Parse::RecDescent matching same line twice by kudra

Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post; it's "PerlMonks-approved HTML":

  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.
  • Log In?

    What's my password?
    Create A New User
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others chilling in the Monastery: (4)
    As of 2021-02-26 01:11 GMT
    Find Nodes?
      Voting Booth?

      No recent polls found