From a381e291174676fba8d85c9354b4da723111ff11 Mon Sep 17 00:00:00 2001
From: Trevor Spiteri <tspiteri@ieee.org>
Date: Tue, 11 May 2021 13:36:43 +0200
Subject: [PATCH] add BITS associated constant to core::num::Wrapping

This keeps `Wrapping` synchronized with the primitives it wraps as for
the #32463 `wrapping_int_impl` feature.
---
 library/core/src/num/wrapping.rs | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/library/core/src/num/wrapping.rs b/library/core/src/num/wrapping.rs
index f1b9dabe7d6b7..be6d70320d407 100644
--- a/library/core/src/num/wrapping.rs
+++ b/library/core/src/num/wrapping.rs
@@ -433,6 +433,21 @@ macro_rules! wrapping_int_impl {
             #[unstable(feature = "wrapping_int_impl", issue = "32463")]
             pub const MAX: Self = Self(<$t>::MAX);
 
+            /// Returns the size of this integer type in bits.
+            ///
+            /// # Examples
+            ///
+            /// Basic usage:
+            ///
+            /// ```
+            /// #![feature(wrapping_int_impl)]
+            /// use std::num::Wrapping;
+            ///
+            #[doc = concat!("assert_eq!(<Wrapping<", stringify!($t), ">>::BITS, ", stringify!($t), "::BITS);")]
+            /// ```
+            #[unstable(feature = "wrapping_int_impl", issue = "32463")]
+            pub const BITS: u32 = <$t>::BITS;
+
             /// Returns the number of ones in the binary representation of `self`.
             ///
             /// # Examples