Notice that your code has a subtle bug.
Even if he is running the code through CPP first (to strip out comments, expand macros, rejoin lines), he still has plenty of corner cases to worry about (strings, fucntion pointers, etc)... 
#define p printf

int mai\
n/*this is a comment: main()*/(int argc, char **argv)
{
    int (*f)(int, char **) = &main;

    p("hello world: main()\n");

    if(argc>0)
        f((argc-1),argv);
}

[download]

In reply to Re^2: Slow Regex - How to Optimize by Anonymous Monk
in thread Slow Regex - How to Optimize by noslenj123

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.