Remove lots of numeric traits from the preludes

Num, NumCast, Unsigned, Float, Primitive and Int have been removed.

Author: brendanzab

src/doc/guide-lifetimes.md

@@ -51,6 +51,7 @@ expensive. So we'd like to define a function that takes the points just as
 a reference.
 
 ~~~
+# use std::num::Float;
 # struct Point {x: f64, y: f64}
 # fn sqrt(f: f64) -> f64 { 0.0 }
 fn compute_distance(p1: &Point, p2: &Point) -> f64 {

src/doc/guide-tasks.md

@@ -225,6 +225,7 @@ Here is another example showing how futures allow you to background
 computations. The workload will be distributed on the available cores.
 
 ```{rust}
+# use std::num::Float;
 # use std::sync::Future;
 fn partial_sum(start: uint) -> f64 {
     let mut local_sum = 0f64;
@@ -262,6 +263,7 @@ several computations on a single large vector of floats. Each task needs the
 full vector to perform its duty.
 
 ```{rust}
+use std::num::Float;
 use std::rand;
 use std::sync::Arc;
 

src/libarena/lib.rs

@@ -38,7 +38,7 @@ use std::cmp;
 use std::intrinsics::{TyDesc, get_tydesc};
 use std::intrinsics;
 use std::mem;
-use std::num::UnsignedInt;
+use std::num::{Int, UnsignedInt};
 use std::ptr;
 use std::rc::Rc;
 use std::rt::heap::{allocate, deallocate};

src/libcollections/bit.rs

@@ -22,6 +22,7 @@
 //!
 //! ```
 //! use std::collections::{BitvSet, Bitv};
+//! use std::num::Float;
 //! use std::iter;
 //!
 //! let max_prime = 10000;
@@ -69,6 +70,7 @@ use core::default::Default;
 use core::fmt;
 use core::iter::{Chain, Enumerate, Repeat, Skip, Take};
 use core::iter;
+use core::num::Int;
 use core::slice;
 use core::u32;
 use std::hash;

src/libcollections/enum_set.rs

@@ -15,6 +15,7 @@
 
 use core::prelude::*;
 use core::fmt;
+use core::num::Int;
 
 // FIXME(contentions): implement union family of methods? (general design may be wrong here)
 

src/libcollections/hash/mod.rs

@@ -69,6 +69,7 @@ use alloc::boxed::Box;
 use alloc::rc::Rc;
 use core::intrinsics::TypeId;
 use core::mem;
+use core::num::Int;
 
 use vec::Vec;
 

src/libcollections/vec.rs

@@ -21,7 +21,7 @@ use core::default::Default;
 use core::fmt;
 use core::kinds::marker::{ContravariantLifetime, InvariantType};
 use core::mem;
-use core::num::UnsignedInt;
+use core::num::{Int, UnsignedInt};
 use core::ops;
 use core::ptr;
 use core::raw::Slice as RawSlice;

src/libcore/num/f32.rs

@@ -234,6 +234,8 @@ impl Float for f32 {
     /// The fractional part of the number, satisfying:
     ///
     /// ```rust
+    /// use core::num::Float;
+    ///
     /// let x = 1.65f32;
     /// assert!(x == x.trunc() + x.fract())
     /// ```

src/libcore/num/f64.rs

@@ -240,6 +240,8 @@ impl Float for f64 {
     /// The fractional part of the number, satisfying:
     ///
     /// ```rust
+    /// use core::num::Float;
+    ///
     /// let x = 1.65f64;
     /// assert!(x == x.trunc() + x.fract())
     /// ```

src/libcore/num/mod.rs

@@ -204,6 +204,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0b01001100u8;
     ///
     /// assert_eq!(n.count_ones(), 3);
@@ -215,6 +217,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0b01001100u8;
     ///
     /// assert_eq!(n.count_zeros(), 5);
@@ -230,6 +234,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0b0101000u16;
     ///
     /// assert_eq!(n.leading_zeros(), 10);
@@ -242,6 +248,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0b0101000u16;
     ///
     /// assert_eq!(n.trailing_zeros(), 3);
@@ -254,6 +262,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0x0123456789ABCDEFu64;
     /// let m = 0x3456789ABCDEF012u64;
     ///
@@ -267,6 +277,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0x0123456789ABCDEFu64;
     /// let m = 0xDEF0123456789ABCu64;
     ///
@@ -279,6 +291,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0x0123456789ABCDEFu64;
     /// let m = 0xEFCDAB8967452301u64;
     ///
@@ -293,6 +307,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0x0123456789ABCDEFu64;
     ///
     /// if cfg!(target_endian = "big") {
@@ -313,6 +329,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0x0123456789ABCDEFu64;
     ///
     /// if cfg!(target_endian = "little") {
@@ -333,6 +351,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0x0123456789ABCDEFu64;
     ///
     /// if cfg!(target_endian = "big") {
@@ -353,6 +373,8 @@ pub trait Int
     /// # Example
     ///
     /// ```rust
+    /// use std::num::Int;
+    ///
     /// let n = 0x0123456789ABCDEFu64;
     ///
     /// if cfg!(target_endian = "little") {