bjoernager/rust
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Avoid sorting by DefId for necessary_variants()

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This commit is contained in:
Joshua Nelson 2021-03-28 00:51:31 -04:00
parent 8cd7d86ce2
commit a0957c9d26
1 changed files with 5 additions and 2 deletions
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7
compiler/rustc_hir/src/pat_util.rs
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@ -1,6 +1,7 @@
use crate::def::{CtorOf, DefKind, Res}; use crate::def::{CtorOf, DefKind, Res};
use crate::def_id::DefId; use crate::def_id::DefId;
use crate::hir::{self, HirId, PatKind}; use crate::hir::{self, HirId, PatKind};
use rustc_data_structures::stable_set::FxHashSet;
use rustc_span::symbol::Ident; use rustc_span::symbol::Ident;
use rustc_span::Span; use rustc_span::Span;
@ -138,8 +139,10 @@ impl hir::Pat<'_> {
} }
_ => true, _ => true,
}); });
variants.sort(); // We remove duplicates by inserting into a `FxHashSet` to avoid re-ordering
variants.dedup(); // the bounds
let mut duplicates = FxHashSet::default();
variants.retain(|def_id| duplicates.insert(*def_id));
variants variants
} }