centos man page for perl::critic::policy::subroutines::prohibitreturnsort

Query: perl::critic::policy::subroutines::prohibitreturnsort

OS: centos

Section: 3

Format: Original Unix Latex Style Formatted with HTML and a Horizontal Scroll Bar

Perl::Critic::Policy::Subroutines::ProhibitReturnSort(3)User Contributed Perl DocumentatioPerl::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 2014-06-09 Perl::Critic::Policy::Subroutines::ProhibitReturnSort(3)
Related Man Pages
perl::critic::policy::builtinfunctions::requireblockmap(3) - centos
perl::critic::policy::controlstructures::prohibitunlessblocks(3) - centos
perl::critic::policy::builtinfunctions::prohibitvoidmap(3pm) - debian
perl::critic::policy::controlstructures::prohibitunlessblocks(3pm) - debian
perl::critic::policy::subroutines::prohibitreturnsort(3pm) - debian
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