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Perl::Critic::Policy::Variables::ProhibitUselessInitialization

NAME

Perl::Critic::Policy::Variables::ProhibitUselessInitialization − prohibit superfluous initializations

DESCRIPTION

Don’t clutter your code with unnecessary variable initialization:

    my $scalar = undef;     # don't do this
    my @array  = ();        # or this
    my %hash   = ();        # or this

Instead, do this:

    my $scalar;             # equivalent
    my @array;              # ditto
    my %hash;               # isn't that better?

AUTHOR

John Trammell <johntrammell −at− gmail −dot− com>

COPYRIGHT

Copyright (c) John Joseph Trammell. All rights reserved.

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.

desc()
Returns a string containing a sort description of this policy.

expl()
Returns a string containing an explanation of this policy.

supported_parameters
Define parameters supported by this policy. There are none.

default_severity
Returns a numeric constant defining the severity of violating this policy.

default_themes
Returns a list of strings defining the themes for this policy.

applies_to
Returns a string describing the elements to which this policy applies.

violates
Method to determine if the element currently under scrutiny violates this policy. If it does, return a properly constructed "Perl::Critic::Violation" object. Otherwise, return "undef".

violates_scalar($elem)
Returns true if $elem contains an assignment of the form

    my $foo = undef;

See <http://search.cpan.org/dist/PPI/lib/PPI/Statement/Variable.pm> for details on how this function works.

violates_list($elem)
Returns true if $elem contains an assignment of the forms:

    my @foo = ();   # useless array init
    my %bar = ();   # useless hash init
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