6 use List::Util qw(reduce);
11 handles => [ qw(add_predicate add_rule) ],
17 has facts => (is => 'ro', default => sub { {} });
19 has observation_policy => (is => 'ro');
22 my ($self, @terms) = @_;
23 $self->_solve({ allow_actions => 0 }, @terms);
27 my ($self, @terms) = @_;
28 $self->_solve({ allow_actions => 1 }, @terms);
32 my ($self, @terms) = @_;
33 my $rs = $self->_solve({ allow_actions => 1 }, @terms);
35 while ($r and $r->actions and my @ind = $r->independent_actions) {
36 $self->run_action($_) for @ind;
37 $rs = $self->_solve({ allow_actions => 1 }, @terms);
44 my ($self, $attrs, @terms) = @_;
45 my $rule_set = $self->rule_set;
46 my $head = $rule_set->expand_and_link(undef, @terms, [ 'materialize' ]);
47 my $state = DX::State->new(
53 facts => $self->facts,
54 rule_set => $rule_set,
57 return DX::ResultStream->new(
59 ($self->observation_policy
60 ? (observation_policy => $self->observation_policy)
66 my ($self, $action) = @_;
67 warn +(split('::', ref($action)))[-1]."\n";
68 my @invalidate = $action->run;
69 while (my ($type, $value) = splice @invalidate, 0, 2) {
70 $self->facts->{$type}->remove_value($value);