perl::critic::policy::subroutines::prohibitreturnsort(3pm) [debian man page]

Perl::Critic::Policy::Subroutines::ProhibitReturnSort(3pUser Contributed Perl DocumentatPerl::Critic::Policy::Subroutines::ProhibitReturnSort(3pm)

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 v5.14.2							    2012-06-07		Perl::Critic::Policy::Subroutines::ProhibitReturnSort(3pm)