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Combine drain_filter calls

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Aaron Hill 2021-10-31 16:14:16 -05:00
parent 851f2b2f96
commit 39d44e72ca
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1 changed files with 4 additions and 4 deletions
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8
compiler/rustc_trait_selection/src/traits/project.rs
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@ -946,13 +946,13 @@ fn opt_normalize_projection_type<'a, 'b, 'tcx>(
}; };
let mut deduped: SsoHashSet<_> = Default::default(); let mut deduped: SsoHashSet<_> = Default::default();
result
.obligations
.drain_filter(|sub_obligation| !deduped.insert(sub_obligation.clone()));
let mut canonical = let mut canonical =
SelectionContext::with_query_mode(selcx.infcx(), TraitQueryMode::Canonical); SelectionContext::with_query_mode(selcx.infcx(), TraitQueryMode::Canonical);
result.obligations.drain_filter(|projected_obligation| { result.obligations.drain_filter(|projected_obligation| {
if !deduped.insert(projected_obligation.clone()) {
return true;
}
// If any global obligations always apply, considering regions, then we don't // If any global obligations always apply, considering regions, then we don't
// need to include them. The `is_global` check rules out inference variables, // need to include them. The `is_global` check rules out inference variables,
// so there's no need for the caller of `opt_normalize_projection_type` // so there's no need for the caller of `opt_normalize_projection_type`