Auto merge of #23549 - aturon:stab-num, r=alexcrichton

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]

r? @alexcrichton 

1 files changed, 2 insertions, 0 deletions

diff --git a/src/libstd/sys/unix/mod.rs b/src/libstd/sys/unix/mod.rs
index 5555eec4f39..e8409bb4fd4 100644
--- a/src/libstd/sys/unix/mod.rs
+++ b/src/libstd/sys/unix/mod.rs
@@ -171,6 +171,7 @@ pub fn retry<T, F> (mut f: F) -> T where
     }
 }
 
+#[allow(deprecated)]
 pub fn cvt<T: SignedInt>(t: T) -> io::Result<T> {
     let one: T = Int::one();
     if t == -one {
@@ -180,6 +181,7 @@ pub fn cvt<T: SignedInt>(t: T) -> io::Result<T> {
     }
 }
 
+#[allow(deprecated)]
 pub fn cvt_r<T, F>(mut f: F) -> io::Result<T>
     where T: SignedInt, F: FnMut() -> T
 {