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Manual Reference Pages  -  PERL::CRITIC::POLICY::VALUESANDEXPRESSIONS::PROHIBITQUOTESASQUOTELIKEOPERATORDELIMITERS (3)

.ds Aq ’

NAME

Perl::Critic::Policy::ValuesAndExpressions::ProhibitQuotesAsQuotelikeOperatorDelimiters - Don’t use quotes ("", """, "`") as delimiters for the quote-like operators.

CONTENTS

AFFILIATION

This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

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 = qq;                #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
    $x =~ s$xy;            #ok
    $x = qr$xm;             #ok
    $x = qxfinger foo@bar;  #ok



CONFIGURATION

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 =



SUGGESTED BY

Michael Schwern

AUTHOR

Elliot Shank <perl@galumph.com>

COPYRIGHT

Copyright (c) 2007-2011 Elliot Shank.

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.

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perl v5.20.3 PERL::CRITIC::POLICY::VALUESANDEXPRESSIONS::PROHIBITQUOTESASQUOTELIKEOPERATORDELIMITERS (3) 2016-04-03

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