rollup merge of #23549: aturon/stab-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]

r? @alexcrichton

1 files changed, 3 insertions, 0 deletions

diff --git a/src/libserialize/json.rs b/src/libserialize/json.rs
index f6f059f7210..2d5d8cd501a 100644
--- a/src/libserialize/json.rs
+++ b/src/libserialize/json.rs
@@ -204,6 +204,8 @@ use std::io::prelude::*;
 use std::io;
 use std::mem::swap;
 use std::num::FpCategory as Fp;
+#[allow(deprecated)]
+use std::num::wrapping::WrappingOps;
 use std::ops::Index;
 use std::str::FromStr;
 use std::string;
@@ -1552,6 +1554,7 @@ impl<T: Iterator<Item=char>> Parser<T> {
         }
     }
 
+    #[allow(deprecated)] // possible resolve bug is mapping these to traits
     fn parse_u64(&mut self) -> Result<u64, ParserError> {
         let mut accum = 0;
         let last_accum = 0; // necessary to detect overflow.