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Perl::Critic::Policy::InputOutput::ProhibitJoinedReadline.3pm
Langue: en
Version: 2010-09-08 (fedora - 01/12/10)
Section: 3 (Bibliothèques de fonctions)
NAME
Perl::Critic::Policy::InputOutput::ProhibitJoinedReadline - Use "local $/ = undef" or File::Slurp instead of joined readline.AFFILIATION
This Policy is part of the core Perl::Critic distribution.DESCRIPTION
It's really easy to slurp a whole filehandle in at once with "join q{}, <$fh">, but that's inefficient --- Perl goes to the trouble of splitting the file into lines only to have that work thrown away.To save performance, either slurp the filehandle without splitting like so:
do { local $/ = undef; <$fh> }
or use File::Slurp, which is even faster.
Note that if the "ProhibitPunctuationVars" policy is also in effect, it will complain about the use of $/ in the line above. In that case, write this instead:
use English '-no_match_vars'; do { local $INPUT_RECORD_SEPARATOR = undef; <$fh> };
CONFIGURATION
This Policy is not configurable except for the standard options.CAVEATS
Due to a bug in the current version of PPI (v1.119_03) and earlier, the readline operator is often misinterpreted as less-than and greater-than operators after a comma. Therefore, this policy only works well on the empty filehandle, "<>". When PPI is fixed, this should just start working.CREDITS
Initial development of this policy was supported by a grant from the Perl Foundation.AUTHOR
Chris Dolan <cdolan@cpan.org>COPYRIGHT
Copyright (c) 2007-2009 Chris Dolan. Many 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