From b134d1108ffc92bfb5081d31e5e41141f918e942 Mon Sep 17 00:00:00 2001
From: Jacob Pratt <jacob@jhpratt.dev>
Date: Wed, 10 Aug 2022 18:19:07 -0400
Subject: [PATCH] Implement `From<bool>` for f32, f64

---
 library/core/src/convert/num.rs | 20 ++++++++++++++++++++
 1 file changed, 20 insertions(+)

diff --git a/library/core/src/convert/num.rs b/library/core/src/convert/num.rs
index 9c0d7e9a1e8..45e2f711c6c 100644
--- a/library/core/src/convert/num.rs
+++ b/library/core/src/convert/num.rs
@@ -168,6 +168,26 @@ macro_rules! impl_from_bool {
 // Float -> Float
 impl_from! { f32, f64, #[stable(feature = "lossless_float_conv", since = "1.6.0")] }
 
+// bool -> Float
+#[stable(feature = "float_from_bool", since = "CURRENT_RUSTC_VERSION")]
+#[rustc_const_unstable(feature = "const_num_from_num", issue = "87852")]
+impl const From<bool> for f32 {
+    /// Converts `bool` to `f32` losslessly.
+    #[inline]
+    fn from(small: bool) -> Self {
+        small as u8 as Self
+    }
+}
+#[stable(feature = "float_from_bool", since = "CURRENT_RUSTC_VERSION")]
+#[rustc_const_unstable(feature = "const_num_from_num", issue = "87852")]
+impl const From<bool> for f64 {
+    /// Converts `bool` to `f64` losslessly.
+    #[inline]
+    fn from(small: bool) -> Self {
+        small as u8 as Self
+    }
+}
+
 // no possible bounds violation
 macro_rules! try_from_unbounded {
     ($source:ty, $($target:ty),*) => {$(