Perl::Critic::Policy::ControlStructures::ProhibitCascadingIfElse.3pm

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Version: 2010-05-11 (ubuntu - 24/10/10)

Section: 3 (Bibliothèques de fonctions)

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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. If you're using perl 5.10 or later, use "given"/"when". 
     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 (c) 2005-2009 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.