package DX::Hypothesis;
use DX::ActionPolicy::LockScope;
-use Types::Standard qw(ArrayRef);
use DX::Utils qw(deparse);
use DX::Class;
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
);
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 $pseq = DX::PropositionSequence->new(
- members => \@recheck,
- external_names => {},
- internal_names => {},
+ my ($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, $pseq);
-
- 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
);
}