Feature gate: #![feature(const_slice_is_ascii)]
This is a tracking issue for [u8]::is_ascii being a const fn.
UTF-8 checking in const fn stabilized back in 1.63 (#97367), but apparently somehow simpler ASCII checking was never const-ified.
Public API
// core::slice
impl [u8] {
const fn is_ascii(&self) -> bool;
}
// core::str
impl str {
const fn is_ascii(&self) -> bool;
}Steps / History
Unresolved Questions
Feature gate:
#![feature(const_slice_is_ascii)]This is a tracking issue for
[u8]::is_asciibeing aconst fn.UTF-8 checking in
const fnstabilized back in 1.63 (#97367), but apparently somehow simpler ASCII checking was never const-ified.Public API
Steps / History
[u8]::is_ascii(unstably) #111222Unresolved Questions
Footnotes
https://std-dev-guide.rust-lang.org/feature-lifecycle/stabilization.html ↩