Perl::Critic::Policy::BuiltinFunctions::ProhibitLvalueSubstr3pm
Use 4-argument "substr" instead of writing "substr($foo, 2, 6) = $bar".
Affiliation
This Policy is part of the core Perl::Critic distribution.
Overview
Conway discourages the use of substr() as an lvalue, instead recommending that the 4-argument version of substr() be used instead.
substr($something, 1, 2) = $newvalue; # not oksubstr($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.
Releases
10 releases since Debian 5.0 (Lenny); the text changed 9 times.