bjoernager/rust
bjoernager/rust
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bool to custom enum

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This commit is contained in:
lcnr 2022-04-04 10:56:59 +02:00
parent ced65022da
commit 4a82bc9ea0
3 changed files with 18 additions and 11 deletions
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23
compiler/rustc_middle/src/ty/util.rs
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@ -30,6 +30,13 @@ pub struct Discr<'tcx> {
pub ty: Ty<'tcx>,
}
/// Used as an input to [`TyCtxt::uses_unique_generic_params`].
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub enum IgnoreRegions {
Yes,
No,
}
#[derive(Copy, Clone, Debug)]
pub enum NotUniqueParam<'tcx> {
DuplicateParam(ty::GenericArg<'tcx>),
@ -461,20 +468,18 @@ impl<'tcx> TyCtxt<'tcx> {
pub fn uses_unique_generic_params(
self,
substs: SubstsRef<'tcx>,
ignore_regions: bool,
ignore_regions: IgnoreRegions,
) -> Result<(), NotUniqueParam<'tcx>> {
let mut seen = GrowableBitSet::default();
for arg in substs {
match arg.unpack() {
GenericArgKind::Lifetime(lt) => {
if !ignore_regions {
match lt.kind() {
ty::ReEarlyBound(p) => {
if !seen.insert(p.index) {
return Err(NotUniqueParam::DuplicateParam(lt.into()));
}
}
_ => return Err(NotUniqueParam::NotParam(lt.into())),
if ignore_regions == IgnoreRegions::No {
let ty::ReEarlyBound(p) = lt.kind() else {
return Err(NotUniqueParam::NotParam(lt.into()))
};
if !seen.insert(p.index) {
return Err(NotUniqueParam::DuplicateParam(lt.into()));
}
}
}