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Introduce InhabitedPredicate

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This commit is contained in:
Cameron Steffen 2022-10-04 09:22:39 -05:00
parent 0940040c04
commit 2928e9ef2c
8 changed files with 338 additions and 354 deletions
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15
compiler/rustc_middle/src/query/mod.rs
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@ -1653,14 +1653,13 @@ rustc_queries! {
separate_provide_extern
}
/// Computes the set of modules from which this type is visibly uninhabited.
/// To check whether a type is uninhabited at all (not just from a given module), you could
/// check whether the forest is empty.
query type_uninhabited_from(
key: ty::ParamEnvAnd<'tcx, Ty<'tcx>>
) -> ty::inhabitedness::DefIdForest<'tcx> {
desc { "computing the inhabitedness of `{}`", key.value }
remap_env_constness
query inhabited_predicate_adt(key: DefId) -> ty::inhabitedness::InhabitedPredicate<'tcx> {
desc { "computing the uninhabited predicate of `{:?}`", key }
}
/// Do not call this query directly: invoke `Ty::inhabited_predicate` instead.
query inhabited_predicate_type(key: Ty<'tcx>) -> ty::inhabitedness::InhabitedPredicate<'tcx> {
desc { "computing the uninhabited predicate of `{}`", key }
}
query dep_kind(_: CrateNum) -> CrateDepKind {