$string !~ m{^/[*/]}; # ^-beginning of the line, /- a slash [*/]-character class containing * and /

See   perldoc perlre.

Update:   !~   negates the match.

Update2: Thanks to Corion who pointed out that my approach didn't catch multiple line comments.

# a loop could do it like this:

$block_comment = 0;
while ( <INPUT> ) {
    if    ( m{^//}  ) { next; }
    elsif ( m{^/\*} ) { $block_comment = 1; next; } # start block
    elsif ( m{^\*/} ) { $block_comment = 0; next; } # end block
    elsif ( $block_comment) { next; } # inside block
    else { ... do something with the line, that is no comment ... }
}

[download]

Cheers, Sören

In reply to Re: RegEx - comments should not matches by Happy-the-monk
in thread RegEx - comments should not matches by Chief of Chaos

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.