File Coverage

blib/lib/Perl/ToPerl6/Transformer/PostfixExpressions/AddWhitespace.pm

Criterion	Covered	Total	%
statement	22	28	78.5
branch	0	2	0.0
condition			n/a
subroutine	9	13	69.2
pod	3	5	60.0
total	34	48	70.8

package Perl::ToPerl6::Transformer::PostfixExpressions::AddWhitespace;

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

use Perl::ToPerl6::Utils qw{ :severities };
use Perl::ToPerl6::Utils::PPI qw{
    is_ppi_token_word
    insert_trailing_whitespace
};

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

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

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      => 1,
    elsif   => 1,
    unless  => 1,
    while   => 1,
    until   => 1,
    for     => 1,
    foreach => 1,
);

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

sub supported_parameters { return ()                 }
sub default_necessity    { return $NECESSITY_HIGHEST }
sub default_themes       { return qw( core )         }
sub applies_to           {
    return sub {
        is_ppi_token_word($_[1],%map) and
        $_[1]->next_sibling->isa('PPI::Structure::Condition')
    }
}

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

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

    insert_trailing_whitespace($elem);

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

1;

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

__END__

=pod

=head1 NAME

Perl::ToPerl6::Transformer::CompoundStatements::AddWhitespace - Add whitespace between conditionals 'if', 'unless' &c and ()


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

=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

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