new Op::Predicate

[scpubgit/DKit.git] / lib / DX / RuleSet.pm

diff --git a/lib/DX/RuleSet.pm b/lib/DX/RuleSet.pm
index 09a2ff5..bc8167f 100644 (file)
--- a/lib/DX/RuleSet.pm
+++ b/lib/DX/RuleSet.pm
@@ -14,10 +14,19 @@ use DX::Op::ProposeAction;
 use DX::Op::Materialize;
 use DX::Op::Prop;
 use DX::Op::Exists;
+use DX::Op::Predicate;
 use List::Util qw(reduce);
 
 has rules => (is => 'ro', default => sub { {} });
 
+sub add_predicate {
+  my ($self, $name, $vars, @cases) = @_;
+  my $full_name = join('/', $name, scalar @$vars);
+  push @{$self->rules->{$full_name}}, DX::Op::Predicate->new(
+    arg_names => $vars, arg_cases => \@cases
+  );
+}
+
 sub add_rule {
   my ($self, $name, $vars, @body) = @_;
   my $full_name = join('/', $name, scalar @$vars);