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use 5.010;
use warnings;
use Test::More 'no_plan';
use Regexp::Grammars;
my $list_nonempty = qr{
<List>
<rule: List>
\( <[Value]> ** [,] \)
<token: Value>
\d+
}xms;
my $list_empty = qr{
<List>
<rule: List>
\( (?: <[Value]> ** , x? )? \)
(?{ $MATCH{Value} //= [] })
<token: Value>
\d+
}xms;
my $list_nonbracketed = qr{
<List>
<rule: List>
\( <[Value]> ** (?: , | ; ) \)
<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) => 'Matched non-empty list:' . $list;
is_deeply $/{List}{Value}, eval($data_structure)
=> 'Build correct structure';
}
ok +($input_copy =~ $list_empty) => 'Matched possibly-empty list:' . $list;
is_deeply $/{List}{Value}, eval($data_structure)
=> 'Build correct structure';
if ($list !~ m{ \( \s* \) }xms) {
ok +($input_copy =~ $list_nonbracketed) => 'Matched nonbracketed list:' . $list;
is_deeply $/{List}{Value}, eval($data_structure)
=> 'Build correct structure';
}
}
__DATA__
() : []
(1) : [1]
(1,2) : [1,2]
(1,2,3) : [1,2,3]
( ) : []
( 1 ) : [1]
(1, 2 ) : [1,2]
(1, 2,3 ) : [1,2,3]
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