with 'Visitor::NameTracking';
+# dump the lazy when we get a sensible version of D::V on the dev system
+
has '_traced_refs' => (is => 'ro', lazy => 1, default => sub { {} });
has '_traced_names' => (is => 'ro', lazy => 1, default => sub { {} });
# actually be faster for reconstructing structures but it's fairly academic
# as yet
-#use Moose;
-#use Variable::Magic qw(getdata);
+use Moose;
+# ensure we have next::method available - just because Moose loads it
+# as a side effect doesn't mean it's clever to rely on that
+use MRO::Compat ();
+use Scalar::Util qw(refaddr isweak);
+use namespace::clean -except => 'meta';
+
+extends 'Data::Visitor';
+
+with 'Visitor::NameTracking';
+
+has 'external_mappings' => (is => 'ro', lazy => 1, default => sub { {} });
+has 'weaken_these' => (is => 'ro', lazy => 1, default => sub { {} });
+has 'map_these' => (is => 'ro', lazy => 1, default => sub { {} });
+
+# fairly sure an around modifier will get severely fucked up here
+# in that the copying of @_ will lose the weakness we need to check
+
+sub visit_ref {
+ my $self = shift;
+
+ # have to test $_[0] directly since copying a weak ref gives a strong ref
+
+ if (isweak $_[0]) {
+ $self->weaken_these->{$self->_current_trace_name} = 1;
+ }
+
+ # if we've got a mapping for a reference (i.e. it's supplied from
+ # somewhere else) then we need to record where we are and then
+ # return undef for the fmap process so we serialize an undefined
+ # value and the fixup puts the external reference back in later
+
+ if (my $m = $self->external_mappings->{refaddr $_[0]}) {
+ $self->map_these->{$self->_current_trace_name} = $m;
+ return undef;
+ }
+
+ return $self->next::method(@_);
+}
+
+# force recursion into objects (Data::Visitor doesn't by default)
+
+sub visit_object { shift->visit_ref(@_) }
}
is($map{$e},refaddr($value), "Result for ${e} ok");
}
-=pod
-
-use Data::Dumper; $Data::Dumper::Indent = 1;
-
-warn Dumper($tracer->_traced_refs);
-warn Dumper($tracer->_traced_names);
-
-=pod
-
-cmp_ok(
- scalar(@expect), '==', scalar(@{$tracer->_traced_refs}),
- 'Right number of traced refs',
-);
-
-my $reflist = $tracer->_traced_refs;
-
-foreach my $i (0 .. $#expect) {
- my $tail = "at list pos $i";
- is($e[$i], $reflist[$i], "Correct ref $e[$i] at $tail");
- my $data = getdata $reflist[$i], Trace::Constants::TRACE_WIZ;
- is($data->[0], 'Blue', "tag ok at $tail");
- cmp_ok($data->[1], '==', $i, "Index ok at $i");