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More accurate mutability suggestion

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This commit is contained in:
Esteban Küber
2024-07-03 23:26:10 +00:00
parent 2699d8108c
commit ff92ab0903
19 changed files with 244 additions and 140 deletions
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25
compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs
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@@ -408,10 +408,10 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, '_, 'infcx, 'tcx> {
fn_decl.implicit_self,
hir::ImplicitSelfKind::RefImm | hir::ImplicitSelfKind::RefMut
) {
err.span_suggestion(
upvar_ident.span,
err.span_suggestion_verbose(
upvar_ident.span.shrink_to_lo(),
"consider changing this to be mutable",
format!("mut {}", upvar_ident.name),
"mut ",
Applicability::MachineApplicable,
);
break;
@@ -419,10 +419,10 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, '_, 'infcx, 'tcx> {
}
}
} else {
err.span_suggestion(
upvar_ident.span,
err.span_suggestion_verbose(
upvar_ident.span.shrink_to_lo(),
"consider changing this to be mutable",
format!("mut {}", upvar_ident.name),
"mut ",
Applicability::MachineApplicable,
);
}
@@ -755,13 +755,16 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, '_, 'infcx, 'tcx> {
pat: hir::Pat { kind: hir::PatKind::Ref(_, _), .. },
..
}) = node
&& let Ok(name) =
self.infcx.tcx.sess.source_map().span_to_snippet(local_decl.source_info.span)
{
err.span_suggestion(
pat_span,
err.multipart_suggestion(
"consider changing this to be mutable",
format!("&(mut {name})"),
vec![
(pat_span.until(local_decl.source_info.span), "&(mut ".to_string()),
(
local_decl.source_info.span.shrink_to_hi().with_hi(pat_span.hi()),
")".to_string(),
),
],
Applicability::MachineApplicable,
);
return;