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Perl::Critic::Policy::SubroutinUserPContrPerl::Critic::Policy::Subroutines::ProhibitReturnSort(3)

NAME
       Perl::Critic::Policy::Subroutines::ProhibitReturnSort - Behavior of "sort" is not defined
       if called in scalar context.

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

DESCRIPTION
       The behavior of the builtin "sort" function is not defined if called in scalar context.
       So if you write a subroutine that directly "return"s the result of a "sort" operation,
       then you code will behave unpredictably if someone calls your subroutine in a scalar
       context.  This Policy emits a violation if the "return" keyword is directly followed by
       the "sort" function.  To safely return a sorted list of values from a subroutine, you
       should assign the sorted values to a temporary variable first.  For example:

	  sub frobulate {

	      return sort @list;  # not ok!

	      @sorted_list = sort @list;
	      return @sort	  # ok
	  }

KNOWN BUGS
       This Policy is not sensitive to the "wantarray" function.  So the following code would
       generate a false violation:

	  sub frobulate {

	      if (wantarray) {
		  return sort @list;
	      }
	      else{
		  return join @list;
	      }
	  }

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

CREDITS
       This Policy was suggested by Ulrich Wisser and the <http://iis.se> team.

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::Subroutines::ProhibitReturnSort(3)
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