Fix is_standard_layout for some cases

Author: jturner314

src/impl_methods.rs

@@ -1025,11 +1025,10 @@ impl<A, S, D> ArrayBase<S, D> where S: Data<Elem=A>, D: Dimension
     /// contiguous in memory, it has custom strides, etc.
     pub fn is_standard_layout(&self) -> bool {
         fn is_standard_layout<D: Dimension>(dim: &D, strides: &D) -> bool {
-            let defaults = dim.default_strides();
-            if strides.equal(&defaults) {
+            if dim.slice().iter().any(|&d| d == 0) {
                 return true;
             }
-            if dim.ndim() == 1 { return false; }
+            let defaults = dim.default_strides();
             // check all dimensions -- a dimension of length 1 can have unequal strides
             for (&dim, &s, &ds) in izip!(dim.slice(), strides.slice(), defaults.slice()) {
                 if dim != 1 && s != ds {

tests/array.rs

@@ -656,6 +656,10 @@ fn standard_layout()
     assert!(x1.is_standard_layout());
     let x2 = a.subview(Axis(1), 0);
     assert!(!x2.is_standard_layout());
+    let x3 = ArrayView1::from_shape(1.strides(2), &[1]).unwrap();
+    assert!(x3.is_standard_layout());
+    let x4 = ArrayView2::from_shape((0, 2).strides((0, 1)), &[1, 2]).unwrap();
+    assert!(x4.is_standard_layout());
 }
 
 #[test]