Your grammar can look something more like this: 
file: line(s) /\z/
line: "G017RATEBRKRL" comma rate comma start_date comma end_date comma
+ time newline { ... }
line: "G017CP111 D" comma start_rate comma end_rate comma change comma
+ date comma time newline { ... }
line: "G017RPAGO/N" comma rate comma whitespace  comma whitespace  com
+ma date comma time newline { ... }

[download]
and define your subcomponents as you have. That should work nicer. The different alternatives will be tried one after the other, failing after matching the first word. To speed it up a bit, put a <commit> right after that first word.

-- Randal L. Schwartz, Perl hacker

In reply to Re: A Slough of ParseRecDescent Woes by merlyn
in thread A Slough of ParseRecDescent Woes by Ovid

Title:
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, details, 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, summary, 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.