Merge #616

616: Implement Default for Coordinate and Point r=frewsxcv a=sbland

- [/ ] I agree to follow the project's [code of conduct](https://github.com/georust/geo/blob/master/CODE_OF_CONDUCT.md).
- [/ ] I added an entry to `CHANGES.md` if knowledge of this change could be valuable to users.
---

PR for issue #612

Co-authored-by: Sam Bland <sbland.co.uk@gmail.com>
Co-authored-by: Corey Farwell <coreyf@rwell.org>

geo-types/CHANGES.md

@@ -2,7 +2,8 @@
 
 ## Unreleased
 
-* Add Changes Here
+* Implement `Default` on `Coordinate` and `Point` structs (defaults to `(x: 0, y: 0)`)
+  * <https://github.com/georust/geo/pull/616>
 
 ## 0.7.0
 

geo-types/src/coordinate.rs

@@ -33,6 +33,15 @@ where
     pub y: T,
 }
 
+impl<T: Default + CoordNum> Default for Coordinate<T> {
+    fn default() -> Coordinate<T> {
+        Coordinate {
+            x: T::default(),
+            y: T::default(),
+        }
+    }
+}
+
 impl<T: CoordNum> From<(T, T)> for Coordinate<T> {
     fn from(coords: (T, T)) -> Self {
         Coordinate {

geo-types/src/point.rs

@@ -26,7 +26,7 @@ use std::ops::{Add, Div, Mul, Neg, Sub};
 /// let c = Coordinate { x: 10., y: 20. };
 /// let p2: Point<f64> = c.into();
 /// ```
-#[derive(Eq, PartialEq, Clone, Copy, Debug, Hash)]
+#[derive(Eq, PartialEq, Clone, Copy, Debug, Hash, Default)]
 #[cfg_attr(feature = "serde", derive(Serialize, Deserialize))]
 pub struct Point<T>(pub Coordinate<T>)
 where