Avoid legacy numeric constants.

src/arrayformat.rs

@@ -51,9 +51,9 @@ impl FormatOptions
     fn set_no_limit(mut self, no_limit: bool) -> Self
     {
         if no_limit {
-            self.axis_collapse_limit = std::usize::MAX;
-            self.axis_collapse_limit_next_last = std::usize::MAX;
-            self.axis_collapse_limit_last = std::usize::MAX;
+            self.axis_collapse_limit = usize::MAX;
+            self.axis_collapse_limit_next_last = usize::MAX;
+            self.axis_collapse_limit_last = usize::MAX;
         }
         self
     }

src/arraytraits.rs

@@ -386,7 +386,7 @@ where Slice: AsMut<[A]>
         let xs = slice.as_mut();
         if mem::size_of::<A>() == 0 {
             assert!(
-                xs.len() <= ::std::isize::MAX as usize,
+                xs.len() <= isize::MAX as usize,
                 "Slice length must fit in `isize`.",
             );
         }

src/dimension/mod.rs

@@ -26,7 +26,6 @@ pub use self::remove_axis::RemoveAxis;
 pub(crate) use self::axes::axes_of;
 pub(crate) use self::reshape::reshape_dim;
 
-use std::isize;
 use std::mem;
 
 #[macro_use]
@@ -94,7 +93,7 @@ pub fn size_of_shape_checked<D: Dimension>(dim: &D) -> Result<usize, ShapeError>
         .filter(|&&d| d != 0)
         .try_fold(1usize, |acc, &d| acc.checked_mul(d))
         .ok_or_else(|| from_kind(ErrorKind::Overflow))?;
-    if size_nonzero > ::std::isize::MAX as usize {
+    if size_nonzero > isize::MAX as usize {
         Err(from_kind(ErrorKind::Overflow))
     } else {
         Ok(dim.size())

src/linalg/impl_linalg.rs

@@ -296,7 +296,7 @@ where
 fn dot_shape_error(m: usize, k: usize, k2: usize, n: usize) -> !
 {
     match m.checked_mul(n) {
-        Some(len) if len <= ::std::isize::MAX as usize => {}
+        Some(len) if len <= isize::MAX as usize => {}
         _ => panic!("ndarray: shape {} × {} overflows isize", m, n),
     }
     panic!(