Perl::Critic::Policy::ValuesAndExpressions::ProhibitQuotesAsQuotelikeOperatorDelimiters - Don't use quotes (', ", `) as delimiters for the quote-like operators.
This Policy is part of the core Perl::Critic distribution.
With the obvious exception of using single-quotes to prevent interpolation, using quotes with the quote-like operators kind of defeats the purpose of them and produces obfuscated code, causing problems for future maintainers and their editors/IDEs.
$x = q"q"; #not ok $x = q'q'; #not ok $x = q`q`; #not ok $x = qq"q"; #not ok $x = qr"r"; #not ok $x = qw"w"; #not ok $x = qx`date`; #not ok $x =~ m"m"; #not ok $x =~ s"s"x"; #not ok $x =~ tr"t"r"; #not ok $x =~ y"x"y"; #not ok $x =~ m'$x'; #ok $x =~ s'$x'y'; #ok $x = qr'$x'm; #ok $x = qx'finger foo@bar'; #ok
This policy has three options: single_quote_allowed_operators,
double_quote_allowed_operators, and
back_quote_allowed_operators, which control which operators are
allowed to use each of ', ", ` as delimiters, respectively.
The values allowed for these options are a whitespace delimited
selection of the m, q, qq, qr, qw, qx, s, tr,
and y operators.
By default, double quotes and back quotes (backticks) are not allowed
as delimiters for any operators and single quotes are allowed as
delimiters for the m, qr, qx, and s operators. These
defaults are equivalent to having the following in your
.perlcriticrc:
[ValuesAndExpressions::ProhibitQuotesAsQuotelikeOperatorDelimiters] single_quote_allowed_operators = m s qr qx double_quote_allowed_operators = back_quote_allowed_operators =
MSCHWERN
Elliot Shank <perl@galumph.com>
Copyright (c) 2007-2008 Elliot Shank. 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.