add opt in attribute for stable-in-unstable items

This commit is contained in:
Jane Lusby 2022-05-09 15:18:53 -07:00 committed by Jane Losare-Lusby
parent 1e033a9818
commit d053a3dae0

View file

@ -353,7 +353,7 @@ fn check_terminator<'a, 'tcx>(
fn is_const_fn(tcx: TyCtxt<'_>, def_id: DefId, msrv: Option<RustcVersion>) -> bool {
tcx.is_const_fn(def_id)
&& tcx.lookup_const_stability(def_id).map_or(true, |const_stab| {
if let rustc_attr::StabilityLevel::Stable { since } = const_stab.level {
if let rustc_attr::StabilityLevel::Stable { since, .. } = const_stab.level {
// Checking MSRV is manually necessary because `rustc` has no such concept. This entire
// function could be removed if `rustc` provided a MSRV-aware version of `is_const_fn`.
// as a part of an unimplemented MSRV check https://github.com/rust-lang/rust/issues/65262.