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Automatically taint InferCtxt when errors are emitted #126996

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merged 8 commits into from
Jul 1, 2024
Merged

Automatically taint InferCtxt when errors are emitted #126996

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81695a1
Split lifetimes on mir borrowck dataflow
oli-obk Jun 25, 2024
ef55919
Restrict diagnostic context lifetime of mir borrowck to InferCtxt ins…
oli-obk Jun 25, 2024
f3d9523
Restrict diagnostic context lifetime of FnCtxt to InferCtxt instead o…
oli-obk Jun 25, 2024
79ac898
Restrict diagnostic context lifetime of TypeErrCtxt to InferCtxt inst…
oli-obk Jun 25, 2024
5988078
Restrict diagnostic context lifetime of InferCtxt to itself instead o…
oli-obk Jun 26, 2024
86c8eae
Automatically taint InferCtxt when errors are emitted
oli-obk Jun 26, 2024
ba198af
Rename `'cx` to `'infcx`
oli-obk Jun 27, 2024
bd111f5
Document new field and function
oli-obk Jun 27, 2024
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2 changes: 1 addition & 1 deletion compiler/rustc_hir_typeck/src/fn_ctxt/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -144,7 +144,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
}
}

pub(crate) fn dcx(&self) -> DiagCtxtHandle<'tcx> {
pub(crate) fn dcx(&self) -> DiagCtxtHandle<'a> {
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'root_ctxt (or 'rcx) would be a better lifetime name than 'a for FnCtxt.

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@oli-obk oli-obk Jun 27, 2024 •
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Preexisting and very 'root_ctxt is very verbose. I don't really think we should do it. 'rcx is not really better than 'a. We could use 'infcx, but it's used everywhere and does not spark joy. If someone wants to do that change, I won't stop them, but I don't want to do it, and definitely not in this PR.

self.infcx.dcx()
}

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4 changes: 2 additions & 2 deletions compiler/rustc_hir_typeck/src/pat.rs
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Expand Up @@ -1881,7 +1881,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
&self,
pat: &Pat<'_>,
fields: &'tcx [hir::PatField<'tcx>],
) -> Diag<'tcx> {
) -> Diag<'a> {
let mut err = self
.dcx()
.struct_span_err(pat.span, "pattern requires `..` due to inaccessible fields");
Expand Down Expand Up @@ -1973,7 +1973,7 @@ impl<'a, 'tcx> FnCtxt<'a, 'tcx> {
unmentioned_fields: &[(&ty::FieldDef, Ident)],
have_inaccessible_fields: bool,
fields: &'tcx [hir::PatField<'tcx>],
) -> Diag<'tcx> {
) -> Diag<'a> {
let inaccessible = if have_inaccessible_fields { " and inaccessible fields" } else { "" };
let field_names = if let [(_, field)] = unmentioned_fields {
format!("field `{field}`{inaccessible}")
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6 changes: 3 additions & 3 deletions compiler/rustc_infer/src/infer/mod.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -1607,7 +1607,7 @@ impl<'tcx> InferCtxt<'tcx> {
}
}

impl<'tcx> TypeErrCtxt<'_, 'tcx> {
impl<'a, 'tcx> TypeErrCtxt<'a, 'tcx> {
// [Note-Type-error-reporting]
// An invariant is that anytime the expected or actual type is Error (the special
// error type, meaning that an error occurred when typechecking this expression),
Expand All @@ -1623,9 +1623,9 @@ impl<'tcx> TypeErrCtxt<'_, 'tcx> {
sp: Span,
mk_diag: M,
actual_ty: Ty<'tcx>,
) -> Diag<'tcx>
) -> Diag<'a>
where
M: FnOnce(String) -> Diag<'tcx>,
M: FnOnce(String) -> Diag<'a>,
{
let actual_ty = self.resolve_vars_if_possible(actual_ty);
debug!("type_error_struct_with_diag({:?}, {:?})", sp, actual_ty);
Expand Down