Require std feature

Author: multimeric

src/numeric/impl_numeric.rs

@@ -426,26 +426,27 @@ where
     /// use ndarray::{array};
     ///
     /// let a = array![
-    ///   [1., 2.],
-    ///   [3., 4.],
+    ///   [1, 2],
+    ///   [3, 4],
     /// ];
-    /// assert_eq!(a.pow(2.), array![
-    ///   [1., 4.],
-    ///   [9., 16.],
+    /// assert_eq!(a.pow(2), array![
+    ///   [1, 4],
+    ///   [9, 16],
     /// ]);
     /// ```
     /// ```
     /// use ndarray::{array};
     ///
     /// let a = array![
-    ///   [1., 4.],
-    ///   [9., 16.],
+    ///   [1, 4],
+    ///   [9, 16],
     /// ];
     /// assert_eq!(a.pow(0.5), array![
-    ///   [1., 2.],
-    ///   [3., 4.],
+    ///   [1, 2],
+    ///   [3, 4],
     /// ]);
     /// ```
+    #[cfg(feature = "std")]
     pub fn pow<B>(&self, pow: B) -> Array<<A as Pow<B>>::Output, D>
     where
         A: Pow<B> + Clone,