Jeffrey Ryan Thalhammer > Perl-Critic-1.118 > Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr

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Module Version: 1.118   Source   Latest Release: Perl-Critic-1.121_01

NAME ^

Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr - Use 4-argument substr instead of writing substr($foo, 2, 6) = $bar.

AFFILIATION ^

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

DESCRIPTION ^

Conway discourages the use of substr() as an lvalue, instead recommending that the 4-argument version of substr() be used instead.

    substr($something, 1, 2) = $newvalue;     # not ok
    substr($something, 1, 2, $newvalue);      # ok

The four-argument form of substr() was introduced in Perl 5.005. This policy does not report violations on code which explicitly specifies an earlier version of Perl (e.g. use 5.004;).

CONFIGURATION ^

This Policy is not configurable except for the standard options.

SEE ALSO ^

"substr" in perlfunc (or perldoc -f substr).

"4th argument to substr" in perl5005delta

AUTHOR ^

Graham TerMarsch <graham@howlingfrog.com>

COPYRIGHT ^

Copyright (c) 2005-2011 Graham TerMarsch. All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

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