NAME

Perl::Critic::Policy::ValuesAndExpressions::ProhibitSingleArgArraySlice - Prohibit using an array slice with only one index

VERSION

version 0.004

DESCRIPTION

When using an array slice @foo[], you can retrieve multiple values by giving more than one index. Sometimes, however, either due to typo or inexperience, we might only provide a single index.

Perl warns you about this, but it will only do this during runtime. This policy allows you to detect it statically.

  # scalar context, single value retrieved
  my $one_value = $array[$index];            # ok

  # List context, multiple values retrieved
  my @values    = @array[ $index1, $index2 ] # ok

  # Scalar context, single value retrived (the last item in the array)
  # Perl will warn you, but only in runtime
  my $value     = @array[$index];            # not ok

CONFIGURATION

This policy is not configurable except for the standard options.

SEE ALSO

Perl::Critic

AUTHOR

Sawyer X <xsawyerx@cpan.org>

COPYRIGHT AND LICENSE

This software is Copyright (c) 2016 by Sawyer X.

This is free software, licensed under:

  The MIT (X11) License