Written earlier, emphasis added ...

... Error::Simple subclasses (Error objects henceforth) ...

... as in ...

#  In ModErr.pm ...

package ModErr;

use base 'Error::Simple';

1;


# Elsewhere ...

use ModErr qw[ :try ];

try
{
  1 == int( rand(2) )
  ? call_me()
  : wont_you_call()
  ;
}
catch ModErr with
{
  my ( $err ) = @_;

  my $text = $err->text;
  throw ModErr "No call back."
    unless $text =~ /your call/i;
};

print "Everything is ok after all!\n";

sub call_me
{
  throw ModErr "Here is your call!";
}

sub wont_you_call
{
  throw ModErr 'please?';
}
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