From a2210055dbf4b9d24be8651525afbda76569e42b Mon Sep 17 00:00:00 2001
From: Anders Olsson <anders.e.olsson@gmail.com>
Date: Wed, 2 Jan 2019 19:41:12 +0100
Subject: [PATCH] Added Ratable implementation for &'a T and &'a mut T.

---
 src/gaussian.rs |  2 +-
 src/lib.rs      | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/src/gaussian.rs b/src/gaussian.rs
index 0308933..762c101 100644
--- a/src/gaussian.rs
+++ b/src/gaussian.rs
@@ -41,7 +41,7 @@ impl Gaussian {
 
     pub fn mu(&self) -> f64 {
         if self.pi == 0.0 {
-            return 0.0;
+            0.0
         } else {
             self.tau / self.pi
         }
diff --git a/src/lib.rs b/src/lib.rs
index da8fda0..d24365a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -45,6 +45,36 @@ pub trait Rateable {
     }
 }
 
+impl<'a, T> Rateable for &'a T
+where
+    T: Rateable,
+{
+    #[inline]
+    fn mu(&self) -> f64 {
+        T::mu(self)
+    }
+
+    #[inline]
+    fn sigma(&self) -> f64 {
+        T::sigma(self)
+    }
+}
+
+impl<'a, T> Rateable for &'a mut T
+where
+    T: Rateable,
+{
+    #[inline]
+    fn mu(&self) -> f64 {
+        T::mu(self)
+    }
+
+    #[inline]
+    fn sigma(&self) -> f64 {
+        T::sigma(self)
+    }
+}
+
 pub trait RateableMut {
     fn mu_mut(&mut self) -> &mut f64;
     fn sigma_mut(&mut self) -> &mut f64;