File Coverage

blib/lib/Perl/ToPerl6/Transformer/CompoundStatements/FormatConditionals.pm

Criterion	Covered	Total	%
statement	22	31	70.9
branch	1	4	25.0
condition	1	3	33.3
subroutine	11	12	91.6
pod	3	5	60.0
total	38	55	69.0

package Perl::ToPerl6::Transformer::CompoundStatements::FormatConditionals;

use 5.006001;
use strict;
use warnings;
use Readonly;

use Perl::ToPerl6::Utils qw{ :characters :severities };

use base 'Perl::ToPerl6::Transformer';

our $VERSION = '0.03';

#-----------------------------------------------------------------------------

Readonly::Scalar my $DESC => q{Transform 'if()' to 'if ()'};
Readonly::Scalar my $EXPL =>
    q{if(), elsif() and unless() need whitespace in order to not be interpreted as function calls};

#-----------------------------------------------------------------------------

my %map = (
    if      => 'if',
    elsif   => 'elsif',
    unless  => 'unless',
    while   => 'while',
    until   => 'until',
    for     => 'for',
    foreach => 'for',
);

#-----------------------------------------------------------------------------

sub supported_parameters { return () }
sub default_severity     { return $SEVERITY_HIGHEST }
sub default_themes       { return qw(core bugs)     }
sub applies_to           {
    return sub {
        $_[1]->isa('PPI::Statement::Compound') and
        exists $map{$_[1]->first_element->content} and
        $_[1]->first_element->snext_sibling
    }
}

#-----------------------------------------------------------------------------

sub transform {
    my ($self, $elem, $doc) = @_;

    my $token = $elem->first_element;

    my $old_content = $token->content;

    $token->set_content($map{$old_content});

    return if $token->next_sibling->isa('PPI::Token::Whitespace');

    my $space = PPI::Token::Whitespace->new();
    $space->set_content(' ');
    $token->insert_after( $space );

    return $self->transformation( $DESC, $EXPL, $elem );
}

1;

#-----------------------------------------------------------------------------

__END__

=pod

=head1 NAME

Perl::ToPerl6::Transformer::CompoundStatements::FormatConditionals - Format if(), elsif(), unless()


=head1 AFFILIATION

This Transformer is part of the core L<Perl::ToPerl6|Perl::ToPerl6>
distribution.


=head1 DESCRIPTION

While Perl6 conditionals allow parentheses, they need whitespace between the bareword C<if> and the opening parenthesis to avoid being interpreted as a function call:

  if(1) { } --> if (1) { }
  if (1) { } --> if (1) { }

=head1 CONFIGURATION

This Transformer is not configurable except for the standard options.

=head1 AUTHOR

Jeffrey Goff <[e-mail]>

=head1 COPYRIGHT

Copyright (c) 2015 Jeffrey Goff

This program is free software; you can redistribute it and/or modify
it under the same terms as Perl itself.

=cut

##############################################################################
# Local Variables:
#   mode: cperl
#   cperl-indent-level: 4
#   fill-column: 78
#   indent-tabs-mode: nil
#   c-indentation-style: bsd
# End:
# ex: set ts=8 sts=4 sw=4 tw=78 ft=perl expandtab shiftround :