From 27454def0ce5fe4cc8999654e7b47cd14239dbe0 Mon Sep 17 00:00:00 2001
From: varkor <github@varkor.com>
Date: Thu, 15 Mar 2018 22:37:12 +0000
Subject: [PATCH] Implement fmt::Binary for f32 and f64

---
 src/libcore/fmt/float.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/libcore/fmt/float.rs b/src/libcore/fmt/float.rs
index 03e7a9a49d8a7..27d80a3d48d72 100644
--- a/src/libcore/fmt/float.rs
+++ b/src/libcore/fmt/float.rs
@@ -8,9 +8,9 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
-use fmt::{Formatter, Result, LowerExp, UpperExp, Display, Debug};
+use fmt::{Formatter, Result, LowerExp, UpperExp, Display, Debug, Binary};
 use mem;
-use num::flt2dec;
+use num::{flt2dec, Float};
 
 // Don't inline this so callers don't use the stack space this function
 // requires unless they have to.
@@ -150,6 +150,13 @@ macro_rules! floating {
                 float_to_exponential_common(fmt, self, true)
             }
         }
+
+        #[stable(feature = "floating_point_binary_fmt", since = "1.26.0")]
+        impl Binary for $ty {
+            fn fmt(&self, fmt: &mut Formatter) -> Result {
+                write!(fmt, "{:01$b}", self.to_bits(), 8 * mem::size_of::<$ty>())
+            }
+        }
     )
 }