Use GlobalCurve identity for iter dedup

crates/fj-kernel/src/iter.rs

@@ -56,7 +56,7 @@ pub trait ObjectIters<'r> {
  let mut iter = Iter::empty();
 
  for object in self.referenced_objects() {
- iter = iter.with(object.global_curve_iter());
+ iter = iter.with_handles(object.global_curve_iter());
  }
 
  iter
@@ -337,6 +337,18 @@ impl<T> Iter<T> {
  }
 }
 
+impl<T> Iter<&'_ Handle<T>> {
+ fn with_handles(mut self, other: Self) -> Self {
+ for handle in other {
+ if !self.0.iter().any(|h| h.id() == handle.id()) {
+ self.0.push_back(handle);
+ }
+ }
+
+ self
+ }
+}
+
 impl<T> Iterator for Iter<T> {
  type Item = T;