Remove core::num::One from Float trait

Author: mattico

src/float/mod.rs

@@ -1,5 +1,4 @@
 use core::mem::transmute;
-use core::num::One;
 use core::ops::*;
 
 pub mod add;
@@ -8,7 +7,7 @@ pub mod add;
 pub trait Float: Sized {
     /// A uint of the same with as the float
     type Int: Sized + Copy + Clone + Sub<Output=Self::Int> + 
-        ShlAssign<Self::Int> + Shl<Self::Int, Output=Self::Int> + One;
+        ShlAssign<Self::Int> + Shl<Self::Int, Output=Self::Int>;
 
     /// Returns the bitwidth of the float type
     fn bits() -> u32;
@@ -42,8 +41,8 @@ impl Float for f32 {
     }
     fn normalize(significand: Self::Int) -> (Self::Int, Self::Int) {
         let shift = Self::Int::leading_zeros(significand) 
-            - Self::Int::leading_zeros(Self::Int::one() << Self::significand_bits());
-        (Self::Int::one() - shift as Self::Int, significand << shift as Self::Int)
+            - Self::Int::leading_zeros(1 << Self::significand_bits());
+        (1 - shift as Self::Int, significand << shift as Self::Int)
     }
 }
 impl Float for f64 {
@@ -62,7 +61,7 @@ impl Float for f64 {
     }
     fn normalize(significand: Self::Int) -> (Self::Int, Self::Int) {
         let shift = Self::Int::leading_zeros(significand) 
-            - Self::Int::leading_zeros(Self::Int::one() << Self::significand_bits());
-        (Self::Int::one() - shift as Self::Int, significand << shift as Self::Int)
+            - Self::Int::leading_zeros(1 << Self::significand_bits());
+        (1 - shift as Self::Int, significand << shift as Self::Int)
     }
 }

src/lib.rs

@@ -2,7 +2,6 @@
 #![feature(core_intrinsics)]
 #![feature(linkage)]
 #![feature(naked_functions)]
-#![feature(zero_one)]
 #![cfg_attr(not(test), no_std)]
 #![no_builtins]
 // TODO(rust-lang/rust#35021) uncomment when that PR lands