Import some core Items

Author: newpavlov

src/seq/index.rs

@@ -7,6 +7,7 @@
 // except according to those terms.
 
 //! Low-level API for sampling indices
+use core::{cmp::Ordering, hash::Hash, ops::AddAssign};
 
 #[cfg(feature = "alloc")]
 use core::slice;
@@ -337,23 +338,27 @@ where
         index: N,
         key: f64,
     }
+
     impl<N> PartialOrd for Element<N> {
-        fn partial_cmp(&self, other: &Self) -> Option<core::cmp::Ordering> {
+        fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
             Some(self.cmp(other))
         }
     }
+
     impl<N> Ord for Element<N> {
-        fn cmp(&self, other: &Self) -> core::cmp::Ordering {
+        fn cmp(&self, other: &Self) -> Ordering {
             // partial_cmp will always produce a value,
             // because we check that the weights are not nan
             self.key.partial_cmp(&other.key).unwrap()
         }
     }
+
     impl<N> PartialEq for Element<N> {
         fn eq(&self, other: &Self) -> bool {
             self.key == other.key
         }
     }
+
     impl<N> Eq for Element<N> {}
 
     let mut candidates = Vec::with_capacity(length.as_usize());
@@ -442,13 +447,12 @@ where
     IndexVec::from(indices)
 }
 
-trait UInt:
-    Copy + PartialOrd + Ord + PartialEq + Eq + SampleUniform + core::hash::Hash + core::ops::AddAssign
-{
+trait UInt: Copy + PartialOrd + Ord + PartialEq + Eq + SampleUniform + Hash + AddAssign {
     fn zero() -> Self;
     fn one() -> Self;
     fn as_usize(self) -> usize;
 }
+
 impl UInt for u32 {
     #[inline]
     fn zero() -> Self {
@@ -465,6 +469,7 @@ impl UInt for u32 {
         self as usize
     }
 }
+
 impl UInt for usize {
     #[inline]
     fn zero() -> Self {