format aperture in backtrack trace

[scpubgit/DX.git] / lib / DX / Hypothesis.pm

diff --git a/lib/DX/Hypothesis.pm b/lib/DX/Hypothesis.pm
index 59e0480..c3a8fe4 100644 (file)
--- a/lib/DX/Hypothesis.pm
+++ b/lib/DX/Hypothesis.pm
@@ -1,7 +1,6 @@
 package DX::Hypothesis;
 
 use DX::ActionPolicy::LockScope;
-use Types::Standard qw(ArrayRef);
 use DX::Utils qw(deparse);
 use DX::Class;
 
@@ -11,10 +10,6 @@ has resolved_propositions => (
   is => 'ro', isa => ResolvedPropositionSet, required => 1
 );
 
-has outstanding_propositions => (
-  is => 'ro', isa => ArrayRef[Proposition], required => 1
-);
-
 has actions => (
   is => 'ro', isa => ArrayRef[Action], required => 1
 );
@@ -25,78 +20,37 @@ has action_applications => (
 
 has action_policy => (is => 'ro', isa => ActionPolicy, required => 1);
 
-sub head_proposition { shift->outstanding_propositions->[0] }
-
 sub with_actions {
   my ($self, @actions) = @_;
   my $hyp = $self;
+  my @events;
   foreach my $act (@actions) {
     return undef unless $self->action_policy->allows($act);
-    ($hyp, my @events) = $act->dry_run($hyp);
-    return undef unless $hyp;
-    $hyp = $hyp->but_recheck_for(@events);
+    ($hyp, my @these_events) = $act->dry_run($hyp);
     return undef unless $hyp;
+    push @events, @these_events;
   }
-  return $hyp;
-}
-
-sub but_recheck_for {
-  my ($self, @events) = @_;
-  my ($still_resolved, @recheck) = $self->resolved_propositions
-                                        ->but_expire_for(@events);
-  return $self unless @recheck;
-
-  my $ap = DX::ActionPolicy::LockScope->new(
-    lock_to_depth => $self->scope->depth,
-    next_policy => $self->action_policy,
-  );
-
-  # we should probably be doing something about pruning the scope
-  # but that's completely pointless until we have rules
-
-  my $hyp = ref($self)->new(
-    scope => $self->scope,
-    resolved_propositions => DX::ResolvedPropositionSet->new_empty,
-    outstanding_propositions => \@recheck,
-    actions => [],
-    action_applications => [],
-    action_policy => $ap,
+  my ($still_resolved, @recheck) = $hyp->resolved_propositions
+                                       ->but_expire_for(@events);
+  return (
+    $hyp->but(resolved_propositions => $still_resolved),
+    @recheck
   );
-
-  trace 'step.recheck.hyp' => $hyp;
-
-  my $ss = DX::SearchState->new_for($hyp);
-
-  my $sol_ss = $ss->find_solution;
-
-  unless ($sol_ss) {
-    trace 'step.recheck.fail' => 'argh';
-    return undef;
-  }
-
-  my $sol_rps = $sol_ss->current_hypothesis->resolved_propositions;
-
-  my $rps = $still_resolved;
-
-  $rps = $rps->with_updated_dependencies_for(
-    $_, $sol_rps->dependencies_for($_)
-  ) for @recheck;
-
-  trace 'step.recheck.done' => 'yay';
-
-  return $self->but(resolved_propositions => $rps);
 }
 
-sub resolve_head_dependent_on {
-  my ($self, $depends) = @_;
-  my ($first, @rest) = @{$self->outstanding_propositions};
-  $self->but(
-    resolved_propositions => $self->resolved_propositions
-                                  ->with_resolution_for(
-                                      $first,
-                                      $depends,
-                                    ),
-    outstanding_propositions => \@rest,
+sub with_resolution {
+  my ($self, $prop, $depends, $actions) = @_;
+  (my $hyp, my @recheck) = $self->with_actions(@$actions);
+  return undef unless $hyp;
+  return (
+    $hyp->but(
+      resolved_propositions => $self->resolved_propositions
+                                    ->with_resolution_for(
+                                        $prop,
+                                        $depends,
+                                      ),
+    ),
+    @recheck
   );
 }