6 use DX::Op::ApplyConstraint;
10 use List::Util qw(reduce);
12 has rules => (is => 'ro', default => sub { {} });
15 my ($self, $name, $vars, @body) = @_;
16 my $full_name = join('/', $name, scalar @$vars);
17 push @{$self->rules->{$full_name}}, $self->_make_rule($vars, @body);
22 my ($self, $vars, @body) = @_;
23 my $head = reduce { $b->but(next => $a) }
25 reverse map $self->expand(@$_), @body;
30 my ($self, $type, @rest) = @_;
31 if ($self->can(my $expand_meth = "_expand_${type}")) {
32 return $self->$expand_meth(@rest);
34 return $self->_expand_call($type, @rest);
38 my ($self, $name, @args) = @_;
39 DX::Op::CallRule->new(rule_name => $name, rule_args => \@args);
42 sub _expand_cut { return DX::Op::Cut->new }
44 sub _expand_member_of {
45 my ($self, $member_var, $coll_var) = @_;
46 DX::Op::MemberOf->new(
47 member_var => $member_var,
48 coll_var => $coll_var,
52 sub _expand_constrain {
53 my ($self, $vars, $constraint) = @_;
54 DX::Op::ApplyConstraint->new(
56 constraint => $constraint
61 my ($self, $vars, $builder) = @_;