use 5.010;
use warnings;
use Test::More 'no_plan';
use Regexp::Grammars;
my $list_nonempty = qr{
<List>
<rule: List>
\( <[Value]>? % <sep=(,)> \)
<token: Value>
\d+
}xms;
no Regexp::Grammars;
while (my $input = <DATA>) {
chomp $input;
my $input_copy = $input;
my ($list, $data_structure) = split /\s*:\s*/, $input;
if ($list !~ m{ \( \s* \) }xms) {
ok +($input =~ $list_nonempty xor $data_structure =~ /FAIL/) => 'Correct for:' . $list;
if ($data_structure !~ /FAIL/) {
is_deeply $/{List}{Value}, eval($data_structure)
=> 'Build correct structure';
}
}
}
__DATA__
() : undef
(1) : [1]
(1,2) : FAIL
(1,2,3) : FAIL
(1,2,3,4) : FAIL
(1,2,3,4,5) : FAIL
( ) : undef
( 1 ) : [1]
(1, 2 ) : FAIL
(1, 2,3 ) : FAIL
(1, 2, 3, 4) : FAIL
(1, 2, 3, 4,5) : FAIL