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authorbors <bors@rust-lang.org>2022-02-01 03:58:32 +0000
committerbors <bors@rust-lang.org>2022-02-01 03:58:32 +0000
commit25862ffc8d360b34dd8ec82a2f01750aaab976b7 (patch)
treed9ef0def054f8bc2a497a7d3b5b3d17ed8c15f0f /compiler/rustc_incremental/src/lib.rs
parenta6cd4aa9a784e3d2e54bca2a1b41082fda67310d (diff)
parentf5a32711dc14ea66510bd5c8a21763183ee5fc99 (diff)
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Auto merge of #93259 - eddyb:diagbld-scalar-pair, r=jackh726
rustc_errors: only box the `diagnostic` field in `DiagnosticBuilder`.

I happened to need to do the first change (replacing `allow_suggestions` with equivalent functionality on `Diagnostic` itself) as part of a larger change, and noticed that there's only two fields left in `DiagnosticBuilderInner`.

So with this PR, instead of a single pointer, `DiagnosticBuilder` is two pointers, which should work just as well for passing *it* by value (and may even work better wrt some operations, though probably not by much).

But anything that was already taking advantage of `DiagnosticBuilder` being a single pointer, and wrapping it further (e.g. `Result<T, DiagnosticBuilder>` w/ non-ZST `T`), ~~will probably see a slowdown~~, so I want to do a perf run before even trying to propose this.
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