make TraitObject visitors public

Author: b-naber

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/mod.rs

@@ -16,7 +16,7 @@ mod util;
 
 pub use different_lifetimes::suggest_adding_lifetime_params;
 pub use find_anon_type::find_anon_type;
-pub use static_impl_trait::suggest_new_region_bound;
+pub use static_impl_trait::{suggest_new_region_bound, HirTraitObjectVisitor, TraitObjectVisitor};
 pub use util::find_param_with_region;
 
 impl<'cx, 'tcx> InferCtxt<'cx, 'tcx> {

compiler/rustc_infer/src/infer/error_reporting/nice_region_error/static_impl_trait.rs

@@ -546,7 +546,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
 }
 
 /// Collect all the trait objects in a type that could have received an implicit `'static` lifetime.
-pub(super) struct TraitObjectVisitor(pub(super) FxHashSet<DefId>);
+pub struct TraitObjectVisitor(pub FxHashSet<DefId>);
 
 impl<'tcx> TypeVisitor<'tcx> for TraitObjectVisitor {
     fn visit_ty(&mut self, t: Ty<'tcx>) -> ControlFlow<Self::BreakTy> {
@@ -563,7 +563,7 @@ impl<'tcx> TypeVisitor<'tcx> for TraitObjectVisitor {
 }
 
 /// Collect all `hir::Ty<'_>` `Span`s for trait objects with an implicit lifetime.
-pub(super) struct HirTraitObjectVisitor<'a>(pub(super) &'a mut Vec<Span>, pub(super) DefId);
+pub struct HirTraitObjectVisitor<'a>(pub &'a mut Vec<Span>, pub DefId);
 
 impl<'a, 'tcx> Visitor<'tcx> for HirTraitObjectVisitor<'a> {
     fn visit_ty(&mut self, t: &'tcx hir::Ty<'tcx>) {