Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr - Use 4-argument
substr instead of writing
substr($foo, 2, 6) = $bar.
This Policy is part of the core Perl::Critic distribution.
Conway discourages the use of
substr() as an lvalue, instead recommending that the 4-argument version of
substr() be used instead.
substr($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.
This Policy is not configurable except for the standard options.
"substr" in perlfunc (or
perldoc -f substr).
Graham TerMarsch <email@example.com>
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.