bring back manual Default for GeomCollection

thehappycheese · Feb 21, 2022 · 228e65a · 228e65a
1 parent 0ee2101
commit 228e65a
Showing 1 changed file with 9 additions and 1 deletion.
diff --git a/geo-types/src/geometry_collection.rs b/geo-types/src/geometry_collection.rs
@@ -69,12 +69,20 @@ use std::ops::{Index, IndexMut};
 /// println!("{:?}", gc[0]);
 /// ```
 ///
-#[derive(Eq, PartialEq, Clone, Debug, Hash, Default)]
+#[derive(Eq, PartialEq, Clone, Debug, Hash)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct GeometryCollection<T>(pub Vec<Geometry<T>>)
 where
     T: CoordNum;
 
+// Implementing Default by hand because T does not have Default restriction
+// todo: consider adding Default as a CoordNum requirement
+impl<T: CoordNum> Default for GeometryCollection<T> {
+    fn default() -> Self {
+        GeometryCollection(Vec::new())
+    }
+}
+
 impl<T: CoordNum> GeometryCollection<T> {
     /// Return an empty GeometryCollection
     pub fn new() -> GeometryCollection<T> {