Regexp cannot be used to format data, but you could pair up regexps and format data:

%patterns = (
   t => [
      qr/^t\((\d+);(\d+)\)\(([p|q]\d+);([p|q]\d+)\)$/,
      't(%d;%d)(%s;%s)'
   ],
   inv => [
      qr/^inv\((\d+)\)\(([p|q]\d+)([p|q]\d+)\)$/,
      'inv(%d)(%s%s)'
   ],
   '+' => [
      qr/^\+(\d+)$/,
      '+%d'
   ]
);
   
my @parsed;

foreach (
   't(1;3)(q15;p13)',
   'inv(1)(p13p11)',
   '+3',
) {
   my $class;

   foreach my $class (keys(%patterns)) {
      my @fields;
      @fields = /$patterns{$class}[0]/
         and push(@parsed, [ $class, \@fields ]);
   }
}

foreach (@parsed) {
   my ($class, $fields) = @$_;
   printf($patterns{$class}[1], @$fields);
   print(" is of class $class.\n");
}


__END__
t(1;3)(q15;p13) is of class t.
inv(1)(p13p11) is of class inv.
+3 is of class +.

[download]

In reply to Re: Parsing/Deparsing a Formatted String by ikegami
in thread Parsing/Deparsing a Formatted String by AdriftOnMemoryBliss

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.