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review comment: use FxIndexSet

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This commit is contained in:
Esteban Küber 2019-12-27 13:52:20 -08:00
parent 3811232190
commit 2e2f82053f
1 changed files with 3 additions and 3 deletions
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6
src/librustc_infer/infer/error_reporting/nice_region_error/trait_impl_difference.rs
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@ -6,7 +6,7 @@ use crate::infer::error_reporting::nice_region_error::NiceRegionError;
use crate::infer::lexical_region_resolve::RegionResolutionError;
use crate::infer::{Subtype, ValuePairs};
use crate::traits::ObligationCauseCode::CompareImplMethodObligation;
use rustc_data_structures::fx::FxHashSet;
use rustc_data_structures::fx::FxIndexSet;
use rustc_errors::ErrorReported;
use rustc_middle::ty::error::ExpectedFound;
use rustc_middle::ty::fold::TypeFoldable;
@ -70,7 +70,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
// Because this is confusing as hell the first time you see it, we give a short message
// explaining the situation and proposing constraining the type param with a named lifetime
// so that the `impl` will have one to tie them together.
struct AssocTypeFinder(FxHashSet<ty::ParamTy>);
struct AssocTypeFinder(FxIndexSet<ty::ParamTy>);
impl<'tcx> ty::fold::TypeVisitor<'tcx> for AssocTypeFinder {
fn visit_ty(&mut self, ty: Ty<'tcx>) -> bool {
debug!("assoc type finder ty {:?} {:?}", ty, ty.kind);
@ -80,7 +80,7 @@ impl<'a, 'tcx> NiceRegionError<'a, 'tcx> {
ty.super_visit_with(self)
}
}
let mut visitor = AssocTypeFinder(FxHashSet::default());
let mut visitor = AssocTypeFinder(FxIndexSet::default());
trait_fn_sig.output().visit_with(&mut visitor);
if let Some(id) = tcx.hir().as_local_hir_id(trait_def_id) {
let parent_id = tcx.hir().get_parent_item(id);