switch over to storing rspace+ss as decision list

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

diff --git a/lib/DX/SearchState.pm b/lib/DX/SearchState.pm
index 4715606..8b08596 100644 (file)
--- a/lib/DX/SearchState.pm
+++ b/lib/DX/SearchState.pm
@@ -1,6 +1,6 @@
 package DX::SearchState;
 
-use Types::Standard qw(Maybe);
+use Types::Standard qw(Maybe Bool);
 use DX::Step::Backtrack;
 use DX::Step::ConsiderProposition;
 use DX::Step::MarkAsSolution;
@@ -12,9 +12,9 @@ has next_step => (is => 'ro', isa => Maybe[Step], required => 1);
 
 has propositions => (is => 'ro', isa => PropositionSequence, required => 1);
 
-has alternatives => (is => 'ro', isa => AlternativeList, required => 1);
+has decisions_taken => (is => 'ro', isa => DecisionList, required => 1);
 
-has is_solution_state => (is => 'ro', required => 1);
+has is_solution_state => (is => 'ro', isa => Bool, required => 1);
 
 has on_exhaustion_step => (is => 'ro', isa => Maybe[Step], required => 1);
 
@@ -32,7 +32,7 @@ sub new_for {
   my ($class, $hyp, $props) = @_;
   $class->new(
     current_hypothesis => $hyp,
-    alternatives => [],
+    decisions_taken => [],
     propositions => $props,
     (@{$props->members}
       ? (
@@ -51,14 +51,12 @@ sub new_for {
 sub with_one_step {
   my ($self) = @_;
   return undef unless my $step = $self->next_step;
+  #trace step => $step;
   return $step->apply_to($self);
 }
 
 sub force_backtrack {
   my ($self) = @_;
-  my ($first_alt, @rest_alt) = @{$self->alternatives};
-  return undef unless $first_alt;
-  trace 'search.backtrack.forced' => $first_alt->[0];
   return $self->but(
     next_step => DX::Step::Backtrack->new,
   )->with_one_step;