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Rollup merge of #101549 - eholk:type-ir-derive-hashstable_generic, r=jackh726

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Use HashStable_Generic in rustc_type_ir

A lot of the types in this crate implemented HashStable directly to avoid circular dependencies. One way around that is to use HashStable_Generic. We adopt that here to avoid a lot of boilerplate.

This doesn't update all the types, because some would require `I: Interner + HashStable`.

r? `@cjgillot`
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Dylan DPC 2022-09-08 11:55:10 +05:30 • committed by GitHub
commit 7f46d7313c
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compiler/rustc_query_system/src/ich/impls_syntax.rs
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@ -148,3 +148,5 @@ impl<'tcx> HashStable<StableHashingContext<'tcx>> for rustc_feature::Features {
});
}
}
impl<'ctx> rustc_type_ir::HashStableContext for StableHashingContext<'ctx> {}