package DX::Step::ResolveProposition;
+use DX::Step::EnterRecheck;
+use DX::Step::Backtrack;
+
use Types::Standard qw(ArrayRef);
-use DX::Utils qw(deparse);
+
use DX::Class;
with 'DX::Role::Step';
-has actions => (is => 'ro', isa => ArrayRef[Action], required => 1);
+has resolves => (is => 'lazy', init_arg => undef, builder => sub {
+ my ($self) = @_;
+ $self->resolution_space->proposition;
+});
-has depends_on => (is => 'ro', isa => DependencyGroupList, required => 1);
+has resolution_space => (is => 'ro', isa => ResolutionSpace);
-has resolves => (is => 'ro', isa => Proposition);
+has current_resolution => (is => 'lazy', init_arg => undef, builder => sub {
+ my ($self) = @_;
+ $self->resolution_space->next_resolution;
+});
-has alternative_step => (is => 'ro', isa => Step);
+has actions => (is => 'lazy', init_arg => undef, builder => sub {
+ my ($self) = @_;
+ $self->current_resolution->actions;
+});
+
+has depends_on => (is => 'lazy', init_arg => undef, builder => sub {
+ my ($self) = @_;
+ my $_expand_dep = sub {
+ my ($type, @path) = @{$_[0]};
+ my @expanded = map {
+ ref() ? @{$_->value_path or return ()} : $_
+ } @path;
+ return [ $type, @expanded ];
+ };
+ [ map $_expand_dep->($_),
+ @{$self->current_resolution->veracity_depends_on} ];
+});
+
+has alternative_step => (is => 'lazy', init_arg => undef, builder => sub {
+ my ($self) = @_;
+ my $rspace = $self->resolution_space->remaining_resolution_space;
+ return undef unless @{$rspace->members};
+ return $rspace->next_step;
+});
sub but_first {
my ($self, @actions) = @_;
}
sub apply_to {
- my ($self, $ss) = @_;
- my $old_hyp = $ss->current_hypothesis;
- trace 'step.apply.old_hyp '.$self => $old_hyp;
- trace 'step.apply.actions '.$self => $self->actions;
- my $new_hyp = $self->_apply_to_hyp($old_hyp);
- return $ss->but(next_step => DX::Step::Backtrack->new) unless $new_hyp;
- trace 'step.apply.new_hyp '.$self => $new_hyp;
+ my ($self, $old_ss) = @_;
+ trace resolve => [ statement => [
+ [ symbol => 'resolve' ],
+ [ block => [
+ [ statement => [
+ [ symbol => 'proposition' ],
+ @{$self->resolves->for_deparse->[1]},
+ ] ],
+ (@{$self->actions}
+ ? [ statement => [
+ [ symbol => 'actions' ],
+ [ block => [ @{$self->actions} ] ],
+ ] ]
+ : ()),
+ [ statement => [
+ [ symbol => 'depends_on' ],
+ [ pairs => [
+ map [
+ (split '::', ${$_->[0]})[-1],
+ [ value_path => [ @{$_}[1..$#$_] ] ]
+ ], @{$self->depends_on}
+ ] ],
+ ] ],
+ ] ]
+ ] ];
my $ns = do {
- if (my $prop = $ss->next_proposition($new_hyp)) {
+ if (my $prop = $old_ss->next_proposition) {
DX::Step::ConsiderProposition->new(
proposition => $prop
)
} else {
- $ss->on_solution_step
+ $old_ss->on_solution_step
}
};
- my $alt_step = $self->alternative_step;
- return (
- $ss->but(
- current_hypothesis => $new_hyp,
- next_step => $ns,
- ($alt_step
- ? (alternatives => [ [ $old_hyp, $alt_step ], @{$ss->alternatives} ])
- : ()
- ),
+ my $ss = $old_ss->but(
+ next_step => $ns,
+ (@{$self->actions}
+ ? (adjustments_made => [
+ [ $self, $old_ss ],
+ @{$old_ss->adjustments_made}
+ ])
+ : ()
),
);
+ my $new_ss = $self->_apply_to_ss($ss);
+ return $ss->but(next_step => DX::Step::Backtrack->new) unless $new_ss;
+ return $new_ss;
}
-sub _apply_to_hyp {
- my ($self, $old_hyp) = @_;
- return $old_hyp->with_resolution(
+sub _apply_to_ss {
+ my ($self, $old_ss) = @_;
+ my $old_hyp = $old_ss->current_hypothesis;
+ (my $hyp, my @recheck) = $old_hyp->with_resolution(
$self->resolves, $self->depends_on, $self->actions
);
+ return undef unless $hyp;
+ return $self->_recheck_for(
+ $old_ss->but(current_hypothesis => $hyp),
+ @recheck
+ );
+}
+
+sub _recheck_for {
+ my ($self, $old_ss, @recheck) = @_;
+
+ return $old_ss unless @recheck;
+
+ my $ss = $old_ss->but(
+ next_step => DX::Step::EnterRecheck->new(
+ proposition_list => \@recheck,
+ on_completion_step => $old_ss->next_step,
+ on_failure_step => DX::Step::Backtrack->new,
+ ),
+ );
+
+ return $ss;
}
1;