bjoernager/rust
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Add specialized variants of mk_region.

Browse source 
Much like there are specialized variants of `mk_ty`. This will enable
some optimization in the next commit.

Also rename the existing `re_error*` functions as `mk_re_error*`, for
consistency.
This commit is contained in:
Nicholas Nethercote 2023-02-13 13:03:45 +11:00
parent 7439028374
commit cef9004f5a
39 changed files with 196 additions and 173 deletions
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12
compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs
View file

@ -180,20 +180,20 @@ trait TypeOpInfo<'tcx> {
return;
};
let placeholder_region = tcx.mk_region(ty::RePlaceholder(ty::Placeholder {
let placeholder_region = tcx.mk_re_placeholder(ty::Placeholder {
name: placeholder.name,
universe: adjusted_universe.into(),
}));
});
let error_region =
if let RegionElement::PlaceholderRegion(error_placeholder) = error_element {
let adjusted_universe =
error_placeholder.universe.as_u32().checked_sub(base_universe.as_u32());
adjusted_universe.map(|adjusted| {
tcx.mk_region(ty::RePlaceholder(ty::Placeholder {
tcx.mk_re_placeholder(ty::Placeholder {
name: error_placeholder.name,
universe: adjusted.into(),
}))
})
})
} else {
None
@ -390,7 +390,7 @@ fn try_extract_error_from_fulfill_cx<'tcx>(
error_region,
&region_constraints,
|vid| ocx.infcx.region_var_origin(vid),
|vid| ocx.infcx.universe_of_region(ocx.infcx.tcx.mk_region(ty::ReVar(vid))),
|vid| ocx.infcx.universe_of_region(ocx.infcx.tcx.mk_re_var(vid)),
)
}
@ -411,7 +411,7 @@ fn try_extract_error_from_region_constraints<'tcx>(
}
// FIXME: Should this check the universe of the var?
Constraint::VarSubReg(vid, sup) if sup == placeholder_region => {
Some((infcx.tcx.mk_region(ty::ReVar(vid)), cause.clone()))
Some((infcx.tcx.mk_re_var(vid), cause.clone()))
}
_ => None,
}