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Elliot Shank
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NAME

Perl::Critic::Policy::ControlStructures::ProhibitCascadingIfElse - Don't write long "if-elsif-elsif-elsif-elsif...else" chains.

AFFILIATION

This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

Long if-elsif chains are hard to digest, especially if they are longer than a single page or screen. If testing for equality, use a hash lookup instead. See Switch for another approach.

  if ($condition1) {         #ok
      $foo = 1;
  }
  elsif ($condition2) {      #ok
      $foo = 2;
  }
  elsif ($condition3) {      #ok
      $foo = 3;
  }
  elsif ($condition4) {      #too many!
      $foo = 4;
  }
  else {                     #ok
      $foo = $default;
  }

CONFIGURATION

This policy can be configured with a maximum number of elsif alternatives to allow. The default is 2. This can be specified via a max_elsif item in the .perlcriticrc file:

 [ControlStructures::ProhibitCascadingIfElse]
 max_elsif = 3

AUTHOR

Jeffrey Ryan Thalhammer <thaljef@cpan.org>

COPYRIGHT

Copyright (c) 2005-2008 Jeffrey Ryan Thalhammer. All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. The full text of this license can be found in the LICENSE file included with this module.