NAME

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

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 = 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

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.

perl Perl::Critic::Policy::ValuesAndExpressions::ProhibitQuotesAsQuotelikeOperatorDelimiters(3pm)