6 use DX::Op::ApplyConstraint;
8 use List::Util qw(reduce);
10 has rules => (is => 'ro', default => sub { {} });
13 my ($self, $name, $vars, @body) = @_;
14 my $full_name = join('/', $name, scalar @$vars);
15 push @{$self->rules->{$full_name}}, $self->_make_rule($vars, @body);
20 my ($self, $vars, @body) = @_;
21 my $head = reduce { $b->but(next => $a) }
23 reverse map $self->expand(@$_), @body;
28 my ($self, $type, @rest) = @_;
29 if ($self->can(my $expand_meth = "_expand_${type}")) {
30 return $self->$expand_meth(@rest);
32 return $self->_expand_call($type, @rest);
36 my ($self, $name, @args) = @_;
37 DX::Op::CallRule->new(rule_name => $name, rule_args => \@args);
40 sub _expand_member_of {
41 my ($self, $member_var, $coll_var) = @_;
42 DX::Op::MemberOf->new(
43 member_var => $member_var,
44 coll_var => $coll_var,
48 sub _expand_constrain {
49 my ($self, $vars, $constraint) = @_;
50 DX::Op::ApplyConstraint->new(
52 constraint => $constraint