| Perl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames(3pm) | User Contributed Perl Documentation | Perl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames(3pm) |
Perl::Critic::Policy::ControlStructures::ProhibitLabelsWithSpecialBlockNames - Don't use labels that are the same as the special block names.
This Policy is part of the core Perl::Critic distribution.
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.
This Policy is not configurable except for the standard options.
The Perl Buzz article on this issue at <http://perlbuzz.com/2008/05/colons-invalidate-your-begin-and-end-blocks.html>.
Randy Lauen for identifying the problem.
Mike O'Regan
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.
| 2023-01-15 | perl v5.36.0 |