Did stuff, stuff that doens't work.

src/block.rs

@@ -1,21 +1,40 @@
 use std::mem;
+use std::ops::*;
+use std::hash::Hash;
+use std::convert::From;
 
-pub trait BitBlock {
-    const ONE: Self;
+pub trait BitBlock
+    : Copy
+    + Add<Self, Output = Self>
+    + Div<Self, Output = Self>
+    + From<u8>
+    + Sub<Self, Output = Self>
+    + Shl<usize, Output = Self>
+    + Shr<usize, Output = Self>
+    + Not<Output = Self>
+    + BitAnd<Self, Output = Self>
+    + BitOr<Self, Output = Self>
+    + BitXor<Self, Output = Self>
+    + Rem<Self, Output = Self>
+    + Eq
+    + Ord
+    + Hash {
     const ZERO: Self;
+    const ONE: Self;
 
-    fn bits() -> usize;
+    fn bits() -> u8;
     fn count_ones(self) -> usize;
 }
 
 macro_rules! bit_block_impl {
     ($(($t: ty, $size: expr)),*) => ($(
         impl BitBlock for $t {
+            const ZERO: Self = 0;
             const ONE: Self = 1;
-            const ZERO: Self = 1;
 
             #[inline]
-            fn bits() -> usize { $size }
+            fn bits() -> u8 { $size }
+
             #[inline]
             fn count_ones(self) -> usize { self.count_ones() as usize }
         }
@@ -27,5 +46,5 @@ bit_block_impl!{
     (u16, 16),
     (u32, 32),
     (u64, 64),
-    (usize, mem::size_of::<usize>() * 8)
+    (usize, (mem::size_of::<usize>() * 8) as u8)
 }