bjoernager/rust
bjoernager/rust
1
Fork 0
Code Issues Pull requests Activity

rustc_span: Optimize syntax context updates in spans

Browse source
This commit is contained in:
Vadim Petrochenkov 2024-03-03 15:34:22 +03:00
parent a70b2ae577
commit d5dd2d8284
3 changed files with 149 additions and 73 deletions
Download patch file Download diff file Expand all files Collapse all files

10
compiler/rustc_expand/src/mbe/transcribe.rs
View file

@ -30,11 +30,11 @@ impl MutVisitor for Marker {
// it's some advanced case with macro-generated macros. So if we cache the marked version
// of that context once, we'll typically have a 100% cache hit rate after that.
let Marker(expn_id, transparency, ref mut cache) = *self;
let data = span.data();
let marked_ctxt = *cache
.entry(data.ctxt)
.or_insert_with(|| data.ctxt.apply_mark(expn_id.to_expn_id(), transparency));
*span = data.with_ctxt(marked_ctxt);
span.update_ctxt(|ctxt| {
*cache
.entry(ctxt)
.or_insert_with(|| ctxt.apply_mark(expn_id.to_expn_id(), transparency))
});
}
}