ra-ap-rustc_hir 0.28.0

Automatically published version of the package `rustc_hir` in the rust-lang/rust repository from commit 5113ed28ea1451a13eae3a05dca0dbabfd56f587 The publishing script for this crate lives at: https://github.com/rust-analyzer/rustc-auto-publish 
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use crate::def_id::DefId;
use rustc_data_structures::fx::FxIndexMap;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_span::def_id::DefIdMap;
use rustc_span::Symbol;

#[derive(Debug, Default)]
pub struct DiagnosticItems {
    pub id_to_name: DefIdMap<Symbol>,
    pub name_to_id: FxIndexMap<Symbol, DefId>,
}

impl<CTX: crate::HashStableContext> HashStable<CTX> for DiagnosticItems {
    #[inline]
    fn hash_stable(&self, ctx: &mut CTX, hasher: &mut StableHasher) {
        self.name_to_id.hash_stable(ctx, hasher);
    }
}