Remove zero from the Index trait

src/array.rs

@@ -15,14 +15,11 @@ pub unsafe trait Array {
 }
 
 pub trait Index : PartialEq + Copy {
-    fn zero() -> Self;
     fn to_usize(self) -> usize;
     fn from(usize) -> Self;
 }
 
 impl Index for u8 {
-    #[inline(always)]
-    fn zero() -> Self { 0 }
     #[inline(always)]
     fn to_usize(self) -> usize { self as usize }
     #[inline(always)]
@@ -30,8 +27,6 @@ impl Index for u8 {
 }
 
 impl Index for u16 {
-    #[inline(always)]
-    fn zero() -> Self { 0 }
     #[inline(always)]
     fn to_usize(self) -> usize { self as usize }
     #[inline(always)]

src/lib.rs

@@ -96,7 +96,7 @@ impl<A: Array> ArrayVec<A> {
     /// ```
     pub fn new() -> ArrayVec<A> {
         unsafe {
-            ArrayVec { xs: NoDrop::new(new_array()), len: Index::zero() }
+            ArrayVec { xs: NoDrop::new(new_array()), len: Index::from(0) }
         }
     }
 
@@ -440,7 +440,7 @@ impl<A: Array> IntoIterator for ArrayVec<A> {
     type Item = A::Item;
     type IntoIter = IntoIter<A>;
     fn into_iter(self) -> IntoIter<A> {
-        IntoIter { index: Index::zero(), v: self, }
+        IntoIter { index: Index::from(0), v: self, }
     }
 }