bjoernager/rust
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Add candidates for DiscriminantKind builtin

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This commit is contained in:
Wilco Kusee 2023-01-27 20:45:03 +01:00
parent 11d96b5930
commit 5fd4f5bceb
3 changed files with 36 additions and 0 deletions
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8
compiler/rustc_trait_selection/src/solve/assembly.rs
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@ -81,6 +81,7 @@ pub(super) enum CandidateSource {
AliasBound,
}
/// Methods used to assemble candidates for either trait or projection goals.
pub(super) trait GoalKind<'tcx>: TypeFoldable<'tcx> + Copy + Eq {
fn self_ty(self) -> Ty<'tcx>;
@ -188,6 +189,11 @@ pub(super) trait GoalKind<'tcx>: TypeFoldable<'tcx> + Copy + Eq {
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
) -> Vec<CanonicalResponse<'tcx>>;
fn consider_builtin_discriminant_kind_candidate(
ecx: &mut EvalCtxt<'_, 'tcx>,
goal: Goal<'tcx, Self>,
) -> QueryResult<'tcx>;
}
impl<'tcx> EvalCtxt<'_, 'tcx> {
@ -320,6 +326,8 @@ impl<'tcx> EvalCtxt<'_, 'tcx> {
G::consider_builtin_generator_candidate(self, goal)
} else if lang_items.unsize_trait() == Some(trait_def_id) {
G::consider_builtin_unsize_candidate(self, goal)
} else if lang_items.discriminant_kind_trait() == Some(trait_def_id) {
G::consider_builtin_discriminant_kind_candidate(self, goal)
} else {
Err(NoSolution)
};