protected Location getLocation(DynamicObject object, Object value) {
object.updateShape();
final Shape oldShape = object.getShape();
final Property property = oldShape.getProperty(name);
if (property != null && property.getLocation().canSet(object, value)) {
return property.getLocation();
} else {
return null;
}
}
protected static List<Property> getObjectProperties(Shape shape) {
final List<Property> objectProperties = new ArrayList<>();
// User properties only, ShareInternalFieldsNode do the rest
for (Property property : shape.getProperties()) {
if (property.getLocation().canStore(SOME_OBJECT)) {
objectProperties.add(property);
}
}
return objectProperties;
}
protected Shape transitionWithNewField(Shape oldShape, Object value) {
// This duplicates quite a bit of DynamicObject.define(), but should be fixed in Truffle soon.
final Property oldProperty = oldShape.getProperty(name);
if (oldProperty != null) {
if (oldProperty.getFlags() == 0 && oldProperty.getLocation().canSet(null, value)) {
return oldShape; // already the right shape
} else {
DynamicObject copy = oldShape.getLayout().newInstance(oldShape);
copy.define(name, value, 0);
return copy.getShape();
}
} else {
final Location location =
oldShape
.allocator()
.locationForValue(
value, EnumSet.of(LocationModifier.Final, LocationModifier.NonNull));
final Property newProperty = Property.create(name, location, 0);
return oldShape.addProperty(newProperty);
}
}