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rustc_span: Minor improvements

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Introduce `{IndexNewtype,SyntaxContext}::from_u16` for convenience because small indices are sometimes encoded as `u16`.
Use `SpanData::span` instead of `Span::new` where appropriate.
Add a clarifying comment about decoding span parents.
This commit is contained in:
Vadim Petrochenkov 2024-06-16 00:53:00 +03:00
parent 12b33d36f3
commit 14da80c372
6 changed files with 33 additions and 14 deletions
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4
compiler/rustc_metadata/src/rmeta/decoder.rs
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@ -539,7 +539,7 @@ impl<'a, 'tcx> SpanDecoder for DecodeContext<'a, 'tcx> {
} else {
SpanData::decode(self)
};
Span::new(data.lo, data.hi, data.ctxt, data.parent)
data.span()
}
fn decode_symbol(&mut self) -> Symbol {
@ -669,7 +669,7 @@ impl<'a, 'tcx> Decodable<DecodeContext<'a, 'tcx>> for SpanData {
let lo = lo + source_file.translated_source_file.start_pos;
let hi = hi + source_file.translated_source_file.start_pos;
// Do not try to decode parent for foreign spans.
// Do not try to decode parent for foreign spans (it wasn't encoded in the first place).
SpanData { lo, hi, ctxt, parent: None }
}
}