Perl::Critic::Policy::ValuesAndExpressions::RequireInterpolationOfMetachars(3)NAMEPerl::Critic::Policy::ValuesAndExpressions::RequireInterpolationOfMetachars
- Warns that you might have used single quotes when you really wanted
double-quotes.
AFFILIATION
This Policy is part of the core Perl::Critic distribution.
DESCRIPTION
This policy warns you if you use single-quotes or "q//" with a string
that has unescaped metacharacters that may need interpolation. Its hard
to know for sure if a string really should be interpolated without
looking into the symbol table. This policy just makes an educated
guess by looking for metacharacters and sigils which usually indicate
that the string should be interpolated.
Exceptions
· Variable names to "use vars":
use vars '$x'; # ok
use vars ('$y', '$z'); # ok
use vars qw< $a $b >; # ok
· Things that look like e-mail addresses:
print 'john@foo.com'; # ok
$address = 'suzy.bar@baz.net'; # ok
CONFIGURATION
The "rcs_keywords" option allows you to stop this policy from
complaining about things that look like RCS variables, for example, in
deriving values for $VERSION variables.
For example, if you've got code like
our ($VERSION) = (q<$Revision: 4078 $> =~ m/(\d+)/mx);
You can specify
[ValuesAndExpressions::RequireInterpolationOfMetachars]
rcs_keywords = Revision
in your .perlcriticrc to provide an exemption.
NOTES
Perl's own "warnings" pragma also warns you about this.
SEE ALSO
Perl::Critic::Policy::ValuesAndExpressions::ProhibitInterpolationOfLiterals
AUTHOR
Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>
COPYRIGHT
Copyright (c) 2005-2011 Imaginative Software Systems. 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.
Perl::Critic::Policy::ValuesAndExpressions::RequireInterpolationOfMetachars(3)
