Perl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames(3))
NAMEPerl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames
- Don't use labels that are the same as the special block names.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
When using one of the special Perl blocks "BEGIN", "END", "CHECK",
"INIT", and "UNITCHECK", it is easy to mistakenly add a colon to the
end of the block name. E.g.:
# a BEGIN block that gets executed at compile time.
BEGIN { <...code...> }
# an ordinary labeled block that gets executed at run time.
BEGIN: { <...code...> }
The labels "BEGIN:", "END:", etc. are probably errors. This policy
prohibits the special Perl block names from being used as labels.
CONFIGURATION
This Policy is not configurable except for the standard options.
SEE ALSO
The Perl Buzz article on this issue at
http://perlbuzz.com/2008/05/colons-invalidate-your-begin-and-end-blocks.html
<http://perlbuzz.com/2008/05/colons-invalidate-your-begin-and-end-
blocks.html>.
ACKNOWLEDGMENT
Randy Lauen for identifying the problem.
AUTHOR
Mike O'Regan
COPYRIGHT
Copyright (c) 2008-2011 Mike O'Regan. All rights reserved.
This program is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
Perl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames(3)
