Perl::Critic::Policy::ControlStructures::ProhibitUnlessBlocks(3pm)
                                           User Contributed Perl Documentation


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 v5.38.0                      2023-07-26
            Perl::Critic::Policy::ControlStructures::ProhibitUnlessBlocks(3pm)