Beefy Boxes and Bandwidth Generously Provided by pair Networks
Just another Perl shrine
 
PerlMonks  

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Regarding object query langugages, you might look at the CORBA system. As an object request broker, it needs to be fast, so the syntax is pretty simple. Of course, it may be too low level, but will give you ideas.

With regard to parsing, I would first create a grammar. I find Parse::RecDescent too slow when speed is of the essence. Writing your own top-down parser should speed things up and for a small grammar, it should be be easy to maintain as well.

Top-down parsers are constructed from a grammar as follows:

  • Each nonterminal in your grammar becomes a subroutine that you call
  • Alternation '|' is handled with if-then statments
  • Qunatifiers like '*' and '+' are handled with loops
  • Nonterminal strings are matched using regexes.
For learning about parsing and translation, I recommend the dragon book: Compilers, by Aho, Sethi, and Ullman.

-Mark


In reply to Re: Object Query Languages and Parsers by kvale
in thread Object Query Languages and Parsers by TedYoung

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, 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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others studying the Monastery: (8)
    As of 2018-01-19 18:37 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?
      How did you see in the new year?










      Results (222 votes). Check out past polls.

      Notices?