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update if let to match in universal_regions.rs

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Signed-off-by: xizheyin <xizheyin@smail.nju.edu.cn>
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xizheyin 2025-04-08 17:39:15 +08:00
parent a8b0eb7c65
commit c66d35e946
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1 changed files with 11 additions and 11 deletions
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12
compiler/rustc_borrowck/src/universal_regions.rs
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@ -909,19 +909,19 @@ impl<'tcx> UniversalRegionIndices<'tcx> {
/// if it is a placeholder. Handling placeholders requires access to the
/// `MirTypeckRegionConstraints`.
fn to_region_vid(&self, r: ty::Region<'tcx>) -> RegionVid {
if let ty::ReVar(..) = r.kind() {
r.as_var()
} else if let ty::ReError(guar) = r.kind() {
match r.kind() {
ty::ReVar(..) => r.as_var(),
ty::ReError(guar) => {
self.tainted_by_errors.set(Some(guar));
// We use the `'static` `RegionVid` because `ReError` doesn't actually exist in the
// `UniversalRegionIndices`. This is fine because 1) it is a fallback only used if
// errors are being emitted and 2) it leaves the happy path unaffected.
self.fr_static
} else {
*self
}
_ => *self
.indices
.get(&r)
.unwrap_or_else(|| bug!("cannot convert `{:?}` to a region vid", r))
.unwrap_or_else(|| bug!("cannot convert `{:?}` to a region vid", r)),
}
}