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package Perl::Critic::Policy::TooMuchCode::ProhibitLargeBlock;
use strict;
use warnings;
use List::Util qw(first);
use Perl::Critic::Utils;
use parent 'Perl::Critic::Policy';
sub default_themes       { return qw(maintenance)     }
sub applies_to           { return 'PPI::Structure::Block' }
sub violates {
    my ( $self, $elem, $doc ) = @_;
    my $limit = $self->{_config}->{block_statement_count_limit} ||
        $self->{block_statement_count_limit} ||
        10;
    my $word_before = $elem->sprevious_sibling;
    return unless $word_before && $word_before->isa('PPI::Token::Word');
    my ($block_keyword) = first { $_ eq $word_before->content } qw(map grep do);
    return unless $block_keyword;
    my $s = $elem->find('PPI::Statement') or return;
    my $statement_count = @$s;
    return unless $statement_count > $limit;
    return $self->violation('Oversize block', "The statement count in this ${block_keyword} block is ${statement_count}, larger than the limit of ${limit}", $elem);
}
1;
HideShow 25 lines of Pod
=encoding utf-8
=head1 NAME
TooMuchCode::ProhibitLargeBlock -- Find oversized blocks
=head1 DESCRIPTION
This policy scan for large code blocks of the following type.
    map { ... };
    grep { ... };
    do { ... };
By default a large block is one with more than 10 statements. If
you need another limit, you can set the parameter
C<block_statement_count_limit>.
For example in the I<.perlcriticrc> file
  [TooMuchCode::ProhibitLargeBlock]
  block_statement_count_limit = 20
=cut