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Perl::Critic::Policy::Subroutines::ProhibitReturnSort.3pm
Langue: en
Version: 2010-09-08 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
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 <thaljef@cpan.org>COPYRIGHT
Copyright (c) 2005-2009 Jeffrey Ryan Thalhammer. 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.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre