Stabilize std::num

This commit stabilizes the `std::num` module:

* The `Int` and `Float` traits are deprecated in favor of (1) the
  newly-added inherent methods and (2) the generic traits available in
  rust-lang/num.

* The `Zero` and `One` traits are reintroduced in `std::num`, which
  together with various other traits allow you to recover the most
  common forms of generic programming.

* The `FromStrRadix` trait, and associated free function, is deprecated
  in favor of inherent implementations.

* A wide range of methods and constants for both integers and floating
  point numbers are now `#[stable]`, having been adjusted for integer
  guidelines.

* `is_positive` and `is_negative` are renamed to `is_sign_positive` and
  `is_sign_negative`, in order to address #22985

* The `Wrapping` type is moved to `std::num` and stabilized;
  `WrappingOps` is deprecated in favor of inherent methods on the
  integer types, and direct implementation of operations on
  `Wrapping<X>` for each concrete integer type `X`.

Closes #22985
Closes #21069

[breaking-change]

2 files changed, 2 insertions, 0 deletions

diff --git a/src/libstd/sys/common/mod.rs b/src/libstd/sys/common/mod.rs
index a8769ba99e8..d2e2f1044d6 100644
--- a/src/libstd/sys/common/mod.rs
+++ b/src/libstd/sys/common/mod.rs
@@ -14,6 +14,7 @@ use old_io::{self, IoError, IoResult};
 use prelude::v1::*;
 use sys::{last_error, retry};
 use ffi::CString;
+#[allow(deprecated)] // Int
 use num::Int;
 
 #[allow(deprecated)]
diff --git a/src/libstd/sys/common/wtf8.rs b/src/libstd/sys/common/wtf8.rs
index 315df411179..91aa0622e5a 100644
--- a/src/libstd/sys/common/wtf8.rs
+++ b/src/libstd/sys/common/wtf8.rs
@@ -37,6 +37,7 @@ use fmt;
 use hash::{Hash, Hasher};
 use iter::{FromIterator, IntoIterator};
 use mem;
+#[allow(deprecated)] // Int
 use num::Int;
 use ops;
 use slice;