Add optional serde support

Cargo.toml

@@ -11,7 +11,20 @@ readme = "Readme.md"
 license = "MIT"
 
 [dependencies]
-rand = "0.3"
-ordered-float = "0.5.0"
-log = "0.3"
+log = "0.4"
 fnv = "1.0"
+serde = { version = "1.0", optional = true }
+serde_derive = { version = "1.0", optional = true }
+
+[target.'cfg(not(features="serde_derive"))'.dependencies.ordered-float]
+version = "1.0"
+
+[target.'cfg(features="serde_derive")'.dependencies.ordered-float]
+version = "1.0"
+features = ["serde"]
+
+[dev-dependencies]
+serde_test = "1.0"
+
+[features]
+serde_support = ["serde", "serde_derive"]

src/lib.rs

@@ -9,10 +9,16 @@
 
 #[macro_use]
 extern crate log;
-extern crate rand;
 extern crate ordered_float;
 extern crate fnv;
 
+#[cfg(feature = "serde_support")]
+extern crate serde;
+
+#[cfg(feature = "serde_support")]
+#[macro_use]
+extern crate serde_derive;
+
 mod geometry;
 mod point;
 mod dcel;

src/point.rs

@@ -1,11 +1,11 @@
-use rand::{Rand, Rng, random};
 use std::ops::{Sub, Mul, Add};
 use std::fmt;
 use ordered_float::OrderedFloat;
 use std::cmp::Ordering;
 
 /// A point in two dimensions
 #[derive(Clone, Copy, PartialEq, Eq)]
+#[cfg_attr(feature = "serde_support", derive(Serialize, Deserialize))]
 pub struct Point {
     /// x coordinate
     pub x: OrderedFloat<f64>,
@@ -36,13 +36,6 @@ impl fmt::Debug for Point {
     }
 }
 
-#[allow(unused_variables)]
-impl Rand for Point {
-    fn rand<R: Rng>(rng: &mut R) -> Point {
-        Point::new(random::<f64>(), random::<f64>())
-    }
-}
-
 impl Mul<f64> for Point {
     type Output = Point;