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use TyS::walk

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This commit is contained in:
Andrea Nall
2021-03-08 23:03:45 -06:00
parent b27cbda32b
commit e322c773e3
2 changed files with 17 additions and 12 deletions
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19
clippy_utils/src/lib.rs
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@@ -1504,9 +1504,7 @@ fn is_normalizable_helper<'tcx>(
cache.insert(ty, false); // prevent recursive loops
let result = cx.tcx.infer_ctxt().enter(|infcx| {
let cause = rustc_middle::traits::ObligationCause::dummy();
if infcx.at(&cause, param_env).normalize(ty).is_err() {
false
} else {
if infcx.at(&cause, param_env).normalize(ty).is_ok() {
match ty.kind() {
ty::Adt(def, substs) => !def.variants.iter().any(|variant| {
variant
@@ -1514,16 +1512,15 @@ fn is_normalizable_helper<'tcx>(
.iter()
.any(|field| !is_normalizable_helper(cx, param_env, field.ty(cx.tcx, substs), cache))
}),
ty::Ref(_, pointee, _) | ty::RawPtr(ty::TypeAndMut { ty: pointee, .. }) => {
is_normalizable_helper(cx, param_env, pointee, cache)
},
ty::Array(inner_ty, _) | ty::Slice(inner_ty) => is_normalizable_helper(cx, param_env, inner_ty, cache),
ty::Tuple(tys) => !tys.iter().any(|inner| match inner.unpack() {
GenericArgKind::Type(inner_ty) => !is_normalizable_helper(cx, param_env, inner_ty, cache),
_ => false,
_ => !ty.walk().any(|generic_arg| !match generic_arg.unpack() {
GenericArgKind::Type(inner_ty) if inner_ty != ty => {
is_normalizable_helper(cx, param_env, inner_ty, cache)
},
_ => true, // if inner_ty == ty, we've already checked it
}),
_ => true,
}
} else {
false
}
});
cache.insert(ty, result);