1 files changed, 21 insertions, 5 deletions
diff --git a/src/tensor.rs b/src/tensor.rs
index 816308e0..b8fa738a 100644
--- a/src/tensor.rs
+++ b/src/tensor.rs
@@ -445,7 +445,7 @@ impl Tensor {
 }
 
 macro_rules! bin_trait {
-    ($trait:ident, $fn1:ident) => {
+    ($trait:ident, $fn1:ident, $mul:expr, $add:expr) => {
         impl<B: std::borrow::Borrow<Tensor>> std::ops::$trait<B> for Tensor {
             type Output = Result<Tensor>;
 
@@ -477,10 +477,26 @@ macro_rules! bin_trait {
                 Tensor::$fn1(&self, rhs?.borrow())
             }
         }
+
+        impl std::ops::$trait<f64> for Tensor {
+            type Output = Result<Tensor>;
+
+            fn $fn1(self, rhs: f64) -> Self::Output {
+                self.affine($mul(rhs), $add(rhs))
+            }
+        }
+
+        impl std::ops::$trait<f64> for &Tensor {
+            type Output = Result<Tensor>;
+
+            fn $fn1(self, rhs: f64) -> Self::Output {
+                self.affine($mul(rhs), $add(rhs))
+            }
+        }
     };
 }
 
-bin_trait!(Add, add);
-bin_trait!(Sub, sub);
-bin_trait!(Mul, mul);
-bin_trait!(Div, div);
+bin_trait!(Add, add, |_| 1., |v| v);
+bin_trait!(Sub, sub, |_| 1., |v: f64| -v);
+bin_trait!(Mul, mul, |v| v, |_| 0.);
+bin_trait!(Div, div, |v| 1. / v, |_| 0.);