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Perl::Critic::Policy::ControlStUsPerl::Critic::Policy::ControlStructures::ProhibitUnlessBlocks(3)

NAME
       Perl::Critic::Policy::ControlStructures::ProhibitUnlessBlocks - Write "if(! $condition)"
       instead of "unless($condition)".

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

DESCRIPTION
       Conway discourages using "unless" because it leads to double-negatives that are hard to
       understand.  Instead, reverse the logic and use "if".

	   unless($condition) { do_something() } #not ok
	   unless(! $no_flag) { do_something() } #really bad
	   if( ! $condition)  { do_something() } #ok

       This Policy only covers the block-form of "unless".  For the postfix variety, see
       "ProhibitPostfixControls".

CONFIGURATION
       This Policy is not configurable except for the standard options.

SEE ALSO
       Perl::Critic::Policy::ControlStructures::ProhibitPostfixControls

AUTHOR
       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT
       Copyright (c) 2005-2011 Imaginative Software Systems.  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.

perl v5.16.3			 Perl::Critic::Policy::ControlStructures::ProhibitUnlessBlocks(3)
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