Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things

comment on

( #3333=superdoc: print w/replies, xml ) Need Help??

Interesting this ideone if it really lets you run actual perl code, anyway, its best in the future if you also post the code here in code tags, here is the output on my machine

#!/usr/bin/perl use strict; use warnings; use Data::Dumper; my $input = $ARGV[0] // "2 * 3 + 4 # and a comment\n"; my @tokens; $^R and push @tokens, [$^R, $1] while $^R = undef, $input =~ /( \#.*$ | \s+ | [+-] (?{'AddOp'}) | [*\/] (?{'MulOp'}) | \d+ (?{'Number'}) | \( (?{'OpenParen'}) | \) (?{'CloseParen'}) | . (?{ die "Syntax error at position $-[0]\n" }) )/gmx; print Dumper \@tokens; $ perl sUnahm $VAR1 = [ [ 'Number', '2' ], [ 'MulOp', '*' ], [ 'Number', '3' ], [ 'AddOp', '+' ], [ 'Number', '4' ] ];

In reply to Re^2: RFC: Parsing with perl - Regexes and beyond by beech
in thread RFC: Parsing with perl - Regexes and beyond by moritz

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 drinking their drinks and smoking their pipes about the Monastery: (4)
    As of 2020-10-31 21:31 GMT
    Find Nodes?
      Voting Booth?
      My favourite web site is:

      Results (291 votes). Check out past polls.