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Remove ordering traits from rustc_span::hygiene::LocalExpnId #94614

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Merged
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Mar 7, 2022
Merged

Remove ordering traits from rustc_span::hygiene::LocalExpnId #94614

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7 changes: 7 additions & 0 deletions compiler/rustc_span/src/hygiene.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -85,10 +85,17 @@ rustc_index::newtype_index! {
/// A unique ID associated with a macro invocation and expansion.
pub struct LocalExpnId {
ENCODABLE = custom
ORD_IMPL = custom
DEBUG_FORMAT = "expn{}"
}
}

// To ensure correctness of incremental compilation,
// `LocalExpnId` must not implement `Ord` or `PartialOrd`.
// See https://github.com/rust-lang/rust/issues/90317.
impl !Ord for LocalExpnId {}
impl !PartialOrd for LocalExpnId {}

/// Assert that the provided `HashStableContext` is configured with the 'default'
/// `HashingControls`. We should always have bailed out before getting to here
/// with a non-default mode. With this check in place, we can avoid the need
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