Example 1:  A(B(2))
Example 2:  A(B(2)+C(D()))

##</code><code>##

#!/usr/bin/perl -wT

# example 1
my $text = "A(B(2))";
$text = doFunc( "MAIN", $text );
print "Example 1: $text\n";

# example 2
$text = "A(B(2)+C(D()))";
$text = doFunc( "MAIN", $text );  # this fails!
print "Example 2: $text\n";

sub doFunc
{
  my( $theFunc, $theParam ) = @_;

  # FIXME: greedy match fails with: 'TT(TT()+TT(TT()))'
  $theParam =~ s/([A-Z]+)\((.*)\)/&doFunc($1,$2)/geo;

  my $result = "";

  if( $theFunc eq "MAIN" ) {
    $result = $theParam;

  } else {
    # dummy switch here for demonstration
    # this would be an elsif for each function
    $result = "func $theFunc returns <$theParam>";

  }

  return $result;
}