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Perl::Critic::Policy::BuiltinFunctions::ProhibitComplexMappings.3pm
Langue: en
Version: 2009-03-07 (debian - 07/07/09)
Section: 3 (Bibliothèques de fonctions)
NAME
Perl::Critic::Policy::BuiltinFunctions::ProhibitComplexMappings - Map blocks should have a single statement.AFFILIATION
This Policy is part of the core Perl::Critic distribution.DESCRIPTION
The map function can be confusing to novices in the best of circumstances. Mappings with multiple statements are even worse. They're also a maintainer's nightmare because any added complexity decreases readability precipitously. Why? Because map is traditionally a one-liner converting one array to another. Trying to cram lots of functionality into a one-liner is a bad idea in general.The best solutions to a complex mapping are: 1) write a subroutine that performs the manipulation and call that from map; 2) rewrite the map as a for loop.
CAVEATS
This policy currently misses some compound statements inside of the map. For example, the following code incorrectly does not trigger a violation:map { do { foo(); bar() } } @list
CONFIGURATION
By default this policy flags any mappings with more than one statement. While we do not recommend it, you can increase this limit as follows in a .perlcriticrc file:[BuiltinFunctions::ProhibitComplexMappings] max_statements = 2
AUTHOR
Chris Dolan <cdolan@cpan.org>CREDITS
Initial development of this policy was supported by a grant from the Perl Foundation.COPYRIGHT
Copyright (c) 2007-2009 Chris Dolan.This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.
Contenus ©2006-2024 Benjamin Poulain
Design ©2006-2024 Maxime Vantorre