mikros/rust
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Auto merge of #100390 - jhpratt:float-from-bool, r=dtolnay

Browse Source 
Implement `From<bool>` for f32, f64

As is required for trait implementations, these are insta-stable. Given there is a release tomorrow and this needs FCP, I set 1.65 as the stable version.

`@rustbot` label +A-floating-point +C-feature-request +needs-fcp +relnotes +S-waiting-on-review +T-libs-api -T-libs
This commit is contained in:
bors 2022-12-21 14:27:57 +00:00
commit 49143814e1
1 changed files with 20 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

20
library/core/src/convert/num.rs
View File

@ -168,6 +168,26 @@ impl_from! { u32, f64, #[stable(feature = "lossless_float_conv", since = "1.6.0"
// 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),*) => {$(