bjoernager/rust
bjoernager/rust
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use ty::Unevaluated<'tcx, ()> in type system

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This commit is contained in:
b-naber 2022-06-27 16:32:47 +02:00
parent 7098c181f8
commit a4bbb8db5c
32 changed files with 304 additions and 192 deletions
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7
compiler/rustc_infer/src/infer/combine.rs
View file

@ -743,7 +743,8 @@ impl<'tcx> TypeRelation<'tcx> for Generalizer<'_, 'tcx> {
}
}
ty::ConstKind::Unevaluated(ty::Unevaluated { def, substs, promoted }) => {
assert_eq!(promoted, None);
assert_eq!(promoted, ());
let substs = self.relate_with_variance(
ty::Variance::Invariant,
ty::VarianceDiagInfo::default(),
@ -964,13 +965,15 @@ impl<'tcx> TypeRelation<'tcx> for ConstInferUnifier<'_, 'tcx> {
}
}
ty::ConstKind::Unevaluated(ty::Unevaluated { def, substs, promoted }) => {
assert_eq!(promoted, None);
assert_eq!(promoted, ());
let substs = self.relate_with_variance(
ty::Variance::Invariant,
ty::VarianceDiagInfo::default(),
substs,
substs,
)?;
Ok(self.tcx().mk_const(ty::ConstS {
ty: c.ty(),
kind: ty::ConstKind::Unevaluated(ty::Unevaluated { def, substs, promoted }),

11
compiler/rustc_infer/src/infer/mod.rs
View file

@ -1673,7 +1673,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
pub fn try_const_eval_resolve(
&self,
param_env: ty::ParamEnv<'tcx>,
unevaluated: ty::Unevaluated<'tcx>,
unevaluated: ty::Unevaluated<'tcx, ()>,
ty: Ty<'tcx>,
span: Option<Span>,
) -> Result<ty::Const<'tcx>, ErrorHandled> {
@ -1708,7 +1708,7 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
pub fn const_eval_resolve(
&self,
mut param_env: ty::ParamEnv<'tcx>,
unevaluated: ty::Unevaluated<'tcx>,
unevaluated: ty::Unevaluated<'tcx, ()>,
span: Option<Span>,
) -> EvalToValTreeResult<'tcx> {
let mut substs = self.resolve_vars_if_possible(unevaluated.substs);
@ -1739,11 +1739,8 @@ impl<'a, 'tcx> InferCtxt<'a, 'tcx> {
debug!(?param_env_erased);
debug!(?substs_erased);
let unevaluated = ty::Unevaluated {
def: unevaluated.def,
substs: substs_erased,
promoted: unevaluated.promoted,
};
let unevaluated =
ty::Unevaluated { def: unevaluated.def, substs: substs_erased, promoted: () };
// The return value is the evaluated value which doesn't contain any reference to inference
// variables, thus we don't need to substitute back the original values.