X-Git-Url: https://git.lizzy.rs/?a=blobdiff_plain;f=library%2Fcore%2Fsrc%2Fconvert%2Fnum.rs;h=45e2f711c6c90f363e0947b4d0fb1d1a78cf6a6e;hb=726bbfc8f0d6eb431dfa620c1c8fc3848020cd3c;hp=9c0d7e9a1e89e25014d5d42809caecd70c485a7f;hpb=37d7de337903a558dbeb1e82c844fe915ab8ff25;p=rust.git

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),*) => {$(