Merge pull request #83 from aepsil0n/asserteq-refs

Implement AssertEq for reference types

src/traits/operations.rs

@@ -231,6 +231,42 @@ impl ApproxEq<f64> for f64 {
     }
 }
 
+impl<'a, N, T: ApproxEq<N>> ApproxEq<N> for &'a T {
+    fn approx_epsilon(_: Option<&'a T>) -> N {
+        ApproxEq::approx_epsilon(None::<T>)
+    }
+
+    fn approx_eq_eps(&self, other: &&'a T, approx_epsilon: &N) -> bool {
+        ApproxEq::approx_eq_eps(*self, *other, approx_epsilon)
+    }
+
+    fn approx_ulps(_: Option<&'a T>) -> u32 {
+        ApproxEq::approx_ulps(None::<T>)
+    }
+
+    fn approx_eq_ulps(&self, other: &&'a T, ulps: u32) -> bool {
+        ApproxEq::approx_eq_ulps(*self, *other, ulps)
+    }
+}
+
+impl<'a, N, T: ApproxEq<N>> ApproxEq<N> for &'a mut T {
+    fn approx_epsilon(_: Option<&'a mut T>) -> N {
+        ApproxEq::approx_epsilon(None::<T>)
+    }
+
+    fn approx_eq_eps(&self, other: &&'a mut T, approx_epsilon: &N) -> bool {
+        ApproxEq::approx_eq_eps(*self, *other, approx_epsilon)
+    }
+
+    fn approx_ulps(_: Option<&'a mut T>) -> u32 {
+        ApproxEq::approx_ulps(None::<T>)
+    }
+
+    fn approx_eq_ulps(&self, other: &&'a mut T, ulps: u32) -> bool {
+        ApproxEq::approx_eq_ulps(*self, *other, ulps)
+    }
+}
+
 /// Trait of objects having an absolute value.
 /// This is useful if the object does not have the same type as its absolute value.
 pub trait Absolute<A> {

tests/assert.rs

@@ -13,6 +13,7 @@ fn assert_approx_eq_f64() {
     let a = 1.0f64;
     let b = 1.0f64 + 1.0e-12f64;
     assert_approx_eq!(a, b);
+    assert_approx_eq!(&a, &b);
 }
 
 #[test]
@@ -26,6 +27,7 @@ fn assert_approx_eq_vec2_f32_fail() {
 #[test]
 fn assert_approx_eq_eps_f32() {
     assert_approx_eq_eps!(1.0f32, 1.1, 0.2);
+    assert_approx_eq_eps!(&mut 1.0f32, &mut 1.1, 0.2);
 }
 
 #[test]
@@ -40,6 +42,7 @@ fn assert_approx_eq_ulps_f32() {
     let y = 1000000.1_f32;
     assert!(x != y);
     assert_approx_eq_ulps!(x, y, 3);
+    assert_approx_eq_ulps!(&x, &y, 3);
 }
 
 #[test]