bjoernager/rust
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implement the skeleton of the updated trait solver

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This commit is contained in:
lcnr 2022-12-04 03:19:10 +00:00
parent 4653c93e44
commit a213bb36c9
21 changed files with 1569 additions and 87 deletions
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14
compiler/rustc_trait_selection/src/traits/select/mod.rs
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@ -1171,19 +1171,7 @@ impl<'cx, 'tcx> SelectionContext<'cx, 'tcx> {
where
I: Iterator<Item = ty::Predicate<'tcx>>,
{
cycle.all(|predicate| self.coinductive_predicate(predicate))
}
fn coinductive_predicate(&self, predicate: ty::Predicate<'tcx>) -> bool {
let result = match predicate.kind().skip_binder() {
ty::PredicateKind::Clause(ty::Clause::Trait(ref data)) => {
self.tcx().trait_is_coinductive(data.def_id())
}
ty::PredicateKind::WellFormed(_) => true,
_ => false,
};
debug!(?predicate, ?result, "coinductive_predicate");
result
cycle.all(|predicate| predicate.is_coinductive(self.tcx()))
}
/// Further evaluates `candidate` to decide whether all type parameters match and whether nested