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Put param_env into infcx.

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Because they get passed around together a lot.
This commit is contained in:
Nicholas Nethercote 2024-11-01 13:51:00 +11:00
parent c9283f8fa9
commit af50fe407e
14 changed files with 72 additions and 81 deletions
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2
compiler/rustc_borrowck/src/diagnostics/bound_region_errors.rs
View File

@ -60,7 +60,7 @@ impl<'tcx> UniverseInfo<'tcx> {
UniverseInfo::RelateTys { expected, found } => {
let err = mbcx.infcx.err_ctxt().report_mismatched_types(
&cause,
mbcx.param_env,
mbcx.infcx.param_env,
expected,
found,
TypeError::RegionsPlaceholderMismatch,

41
compiler/rustc_borrowck/src/diagnostics/conflict_errors.rs
View File

@ -266,7 +266,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
}
}
if self.param_env.caller_bounds().iter().any(|c| {
if self.infcx.param_env.caller_bounds().iter().any(|c| {
c.as_trait_clause().is_some_and(|pred| {
pred.skip_binder().self_ty() == ty && self.infcx.tcx.is_fn_trait(pred.def_id())
})
@ -682,13 +682,13 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
// Normalize before comparing to see through type aliases and projections.
let old_ty = ty::EarlyBinder::bind(ty).instantiate(tcx, generic_args);
let new_ty = ty::EarlyBinder::bind(ty).instantiate(tcx, new_args);
if let Ok(old_ty) =
tcx.try_normalize_erasing_regions(self.infcx.typing_env(self.param_env), old_ty)
&& let Ok(new_ty) = tcx.try_normalize_erasing_regions(
self.infcx.typing_env(self.param_env),
if let Ok(old_ty) = tcx.try_normalize_erasing_regions(
self.infcx.typing_env(self.infcx.param_env),
old_ty,
) && let Ok(new_ty) = tcx.try_normalize_erasing_regions(
self.infcx.typing_env(self.infcx.param_env),
new_ty,
)
{
) {
old_ty == new_ty
} else {
false
@ -707,15 +707,16 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
// Test the callee's predicates, substituting in `ref_ty` for the moved argument type.
clauses.instantiate(tcx, new_args).predicates.iter().all(|&(mut clause)| {
// Normalize before testing to see through type aliases and projections.
if let Ok(normalized) =
tcx.try_normalize_erasing_regions(self.infcx.typing_env(self.param_env), clause)
{
if let Ok(normalized) = tcx.try_normalize_erasing_regions(
self.infcx.typing_env(self.infcx.param_env),
clause,
) {
clause = normalized;
}
self.infcx.predicate_must_hold_modulo_regions(&Obligation::new(
tcx,
ObligationCause::dummy(),
self.param_env,
self.infcx.param_env,
clause,
))
})
@ -904,7 +905,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let ty = moved_place.ty(self.body, self.infcx.tcx).ty;
debug!("ty: {:?}, kind: {:?}", ty, ty.kind());
let Some(assign_value) = self.infcx.err_ctxt().ty_kind_suggestion(self.param_env, ty)
let Some(assign_value) = self.infcx.err_ctxt().ty_kind_suggestion(self.infcx.param_env, ty)
else {
return;
};
@ -1304,7 +1305,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
pub(crate) fn implements_clone(&self, ty: Ty<'tcx>) -> bool {
let Some(clone_trait_def) = self.infcx.tcx.lang_items().clone_trait() else { return false };
self.infcx
.type_implements_trait(clone_trait_def, [ty], self.param_env)
.type_implements_trait(clone_trait_def, [ty], self.infcx.param_env)
.must_apply_modulo_regions()
}
@ -1437,7 +1438,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let ocx = ObligationCtxt::new_with_diagnostics(self.infcx);
let cause = ObligationCause::misc(span, self.mir_def_id());
ocx.register_bound(cause, self.param_env, ty, def_id);
ocx.register_bound(cause, self.infcx.param_env, ty, def_id);
let errors = ocx.select_all_or_error();
// Only emit suggestion if all required predicates are on generic
@ -1957,7 +1958,8 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
&& let ty::Ref(_, inner, _) = rcvr_ty.kind()
&& let inner = inner.peel_refs()
&& (Holds { ty: inner }).visit_ty(local_ty).is_break()
&& let None = self.infcx.type_implements_trait_shallow(clone, inner, self.param_env)
&& let None =
self.infcx.type_implements_trait_shallow(clone, inner, self.infcx.param_env)
{
err.span_label(
span,
@ -1989,7 +1991,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let obligation = Obligation::new(
self.infcx.tcx,
ObligationCause::dummy(),
self.param_env,
self.infcx.param_env,
trait_ref,
);
self.infcx.err_ctxt().suggest_derive(
@ -3398,7 +3400,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
if let Some(iter_trait) = tcx.get_diagnostic_item(sym::Iterator)
&& self
.infcx
.type_implements_trait(iter_trait, [return_ty], self.param_env)
.type_implements_trait(iter_trait, [return_ty], self.infcx.param_env)
.must_apply_modulo_regions()
{
err.span_suggestion_hidden(
@ -3839,14 +3841,15 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
tcx.get_diagnostic_item(sym::deref_target).and_then(|deref_target| {
Instance::try_resolve(
tcx,
self.infcx.typing_env(self.param_env),
self.infcx.typing_env(self.infcx.param_env),
deref_target,
method_args,
)
.transpose()
});
if let Some(Ok(instance)) = deref_target {
let deref_target_ty = instance.ty(tcx, self.infcx.typing_env(self.param_env));
let deref_target_ty =
instance.ty(tcx, self.infcx.typing_env(self.infcx.param_env));
err.note(format!("borrow occurs due to deref coercion to `{deref_target_ty}`"));
err.span_note(tcx.def_span(instance.def_id()), "deref defined here");
}

8
compiler/rustc_borrowck/src/diagnostics/mod.rs
View File

@ -864,7 +864,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let kind = call_kind(
self.infcx.tcx,
self.infcx.typing_env(self.param_env),
self.infcx.typing_env(self.infcx.param_env),
method_did,
method_args,
*fn_span,
@ -1160,7 +1160,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let suggest = match tcx.get_diagnostic_item(sym::IntoIterator) {
Some(def_id) => type_known_to_meet_bound_modulo_regions(
self.infcx,
self.param_env,
self.infcx.param_env,
Ty::new_imm_ref(tcx, tcx.lifetimes.re_erased, ty),
def_id,
),
@ -1224,7 +1224,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
BoundRegionConversionTime::FnCall,
tcx.fn_sig(method_did).instantiate(tcx, method_args).input(0),
)
&& self.infcx.can_eq(self.param_env, ty, self_ty)
&& self.infcx.can_eq(self.infcx.param_env, ty, self_ty)
{
err.subdiagnostic(CaptureReasonSuggest::FreshReborrow {
span: move_span.shrink_to_hi(),
@ -1258,7 +1258,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
if let Some(errors) = self.infcx.type_implements_trait_shallow(
clone_trait,
ty,
self.param_env,
self.infcx.param_env,
) && !has_sugg
{
let msg = match &errors[..] {

2
compiler/rustc_borrowck/src/diagnostics/move_errors.rs
View File

@ -305,7 +305,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let Some(copy_trait_def) = self.infcx.tcx.lang_items().copy_trait() else { return false };
// This is only going to be ambiguous if there are incoherent impls, because otherwise
// ambiguity should never happen in MIR.
self.infcx.type_implements_trait(copy_trait_def, [ty], self.param_env).may_apply()
self.infcx.type_implements_trait(copy_trait_def, [ty], self.infcx.param_env).may_apply()
}
fn report_cannot_move_from_static(&mut self, place: Place<'tcx>, span: Span) -> Diag<'infcx> {

4
compiler/rustc_borrowck/src/diagnostics/mutability_errors.rs
View File

@ -1242,7 +1242,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
.type_implements_trait_shallow(
clone_trait,
ty.peel_refs(),
self.param_env,
self.infcx.param_env,
)
.as_deref()
{
@ -1279,7 +1279,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let obligation = traits::Obligation::new(
self.infcx.tcx,
traits::ObligationCause::dummy(),
self.param_env,
self.infcx.param_env,
trait_ref,
);
self.infcx.err_ctxt().suggest_derive(

6
compiler/rustc_borrowck/src/diagnostics/region_errors.rs
View File

@ -952,7 +952,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
if let Ok(Some(instance)) = ty::Instance::try_resolve(
tcx,
self.infcx.typing_env(self.param_env),
self.infcx.typing_env(self.infcx.param_env),
*fn_did,
self.infcx.resolve_vars_if_possible(args),
) {
@ -1091,7 +1091,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
peeled_ty = ref_ty;
count += 1;
}
if !self.infcx.type_is_copy_modulo_regions(self.param_env, peeled_ty) {
if !self.infcx.type_is_copy_modulo_regions(self.infcx.param_env, peeled_ty) {
return;
}
@ -1160,7 +1160,7 @@ impl<'infcx, 'tcx> MirBorrowckCtxt<'_, 'infcx, 'tcx> {
let ocx = ObligationCtxt::new(&self.infcx);
ocx.register_obligations(preds.iter().map(|(pred, span)| {
trace!(?pred);
Obligation::misc(tcx, span, self.mir_def_id(), self.param_env, pred)
Obligation::misc(tcx, span, self.mir_def_id(), self.infcx.param_env, pred)
}));
if ocx.select_all_or_error().is_empty() && count > 0 {

12
compiler/rustc_borrowck/src/lib.rs
View File

@ -140,7 +140,6 @@ fn do_mir_borrowck<'tcx>(
) -> (BorrowCheckResult<'tcx>, Option<Box<BodyWithBorrowckFacts<'tcx>>>) {
let def = input_body.source.def_id().expect_local();
let infcx = BorrowckInferCtxt::new(tcx, def);
let param_env = tcx.param_env(def);
let mut local_names = IndexVec::from_elem(None, &input_body.local_decls);
for var_debug_info in &input_body.var_debug_info {
@ -175,8 +174,7 @@ fn do_mir_borrowck<'tcx>(
// will have a lifetime tied to the inference context.
let mut body_owned = input_body.clone();
let mut promoted = input_promoted.to_owned();
let free_regions =
nll::replace_regions_in_mir(&infcx, param_env, &mut body_owned, &mut promoted);
let free_regions = nll::replace_regions_in_mir(&infcx, &mut body_owned, &mut promoted);
let body = &body_owned; // no further changes
// FIXME(-Znext-solver): A bit dubious that we're only registering
@ -213,7 +211,6 @@ fn do_mir_borrowck<'tcx>(
body,
&promoted,
&location_table,
param_env,
&mut flow_inits,
&move_data,
&borrow_set,
@ -250,7 +247,6 @@ fn do_mir_borrowck<'tcx>(
let promoted_body = &promoted[idx];
let mut promoted_mbcx = MirBorrowckCtxt {
infcx: &infcx,
param_env,
body: promoted_body,
move_data: &move_data,
location_table: &location_table, // no need to create a real one for the promoted, it is not used
@ -290,7 +286,6 @@ fn do_mir_borrowck<'tcx>(
let mut mbcx = MirBorrowckCtxt {
infcx: &infcx,
param_env,
body,
move_data: &move_data,
location_table: &location_table,
@ -447,12 +442,14 @@ fn get_flow_results<'a, 'tcx>(
pub(crate) struct BorrowckInferCtxt<'tcx> {
pub(crate) infcx: InferCtxt<'tcx>,
pub(crate) reg_var_to_origin: RefCell<FxIndexMap<ty::RegionVid, RegionCtxt>>,
pub(crate) param_env: ParamEnv<'tcx>,
}
impl<'tcx> BorrowckInferCtxt<'tcx> {
pub(crate) fn new(tcx: TyCtxt<'tcx>, def_id: LocalDefId) -> Self {
let infcx = tcx.infer_ctxt().build(TypingMode::analysis_in_body(tcx, def_id));
BorrowckInferCtxt { infcx, reg_var_to_origin: RefCell::new(Default::default()) }
let param_env = tcx.param_env(def_id);
BorrowckInferCtxt { infcx, reg_var_to_origin: RefCell::new(Default::default()), param_env }
}
pub(crate) fn next_region_var<F>(
@ -531,7 +528,6 @@ impl<'tcx> Deref for BorrowckInferCtxt<'tcx> {
struct MirBorrowckCtxt<'a, 'infcx, 'tcx> {
infcx: &'infcx BorrowckInferCtxt<'tcx>,
param_env: ParamEnv<'tcx>,
body: &'a Body<'tcx>,
move_data: &'a MoveData<'tcx>,

7
compiler/rustc_borrowck/src/nll.rs
View File

@ -50,10 +50,9 @@ pub(crate) struct NllOutput<'tcx> {
/// Rewrites the regions in the MIR to use NLL variables, also scraping out the set of universal
/// regions (e.g., region parameters) declared on the function. That set will need to be given to
/// `compute_regions`.
#[instrument(skip(infcx, param_env, body, promoted), level = "debug")]
#[instrument(skip(infcx, body, promoted), level = "debug")]
pub(crate) fn replace_regions_in_mir<'tcx>(
infcx: &BorrowckInferCtxt<'tcx>,
param_env: ty::ParamEnv<'tcx>,
body: &mut Body<'tcx>,
promoted: &mut IndexSlice<Promoted, Body<'tcx>>,
) -> UniversalRegions<'tcx> {
@ -62,7 +61,7 @@ pub(crate) fn replace_regions_in_mir<'tcx>(
debug!(?def);
// Compute named region information. This also renumbers the inputs/outputs.
let universal_regions = UniversalRegions::new(infcx, def, param_env);
let universal_regions = UniversalRegions::new(infcx, def);
// Replace all remaining regions with fresh inference variables.
renumber::renumber_mir(infcx, body, promoted);
@ -81,7 +80,6 @@ pub(crate) fn compute_regions<'a, 'tcx>(
body: &Body<'tcx>,
promoted: &IndexSlice<Promoted, Body<'tcx>>,
location_table: &LocationTable,
param_env: ty::ParamEnv<'tcx>,
flow_inits: &mut ResultsCursor<'a, 'tcx, MaybeInitializedPlaces<'a, 'tcx>>,
move_data: &MoveData<'tcx>,
borrow_set: &BorrowSet<'tcx>,
@ -101,7 +99,6 @@ pub(crate) fn compute_regions<'a, 'tcx>(
let MirTypeckResults { constraints, universal_region_relations, opaque_type_values } =
type_check::type_check(
infcx,
param_env,
body,
promoted,
universal_regions,

12
compiler/rustc_borrowck/src/type_check/canonical.rs
View File

@ -132,7 +132,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
locations: Locations,
category: ConstraintCategory<'tcx>,
) {
let param_env = self.param_env;
let param_env = self.infcx.param_env;
let predicate = predicate.upcast(self.tcx());
let _: Result<_, ErrorGuaranteed> = self.fully_perform_op(
locations,
@ -158,7 +158,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
where
T: type_op::normalize::Normalizable<'tcx> + fmt::Display + Copy + 'tcx,
{
let param_env = self.param_env;
let param_env = self.infcx.param_env;
let result: Result<_, ErrorGuaranteed> = self.fully_perform_op(
location.to_locations(),
category,
@ -176,7 +176,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
let tcx = self.tcx();
if self.infcx.next_trait_solver() {
let body = self.body;
let param_env = self.param_env;
let param_env = self.infcx.param_env;
self.fully_perform_op(
location.to_locations(),
ConstraintCategory::Boring,
@ -223,7 +223,9 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
let _: Result<_, ErrorGuaranteed> = self.fully_perform_op(
Locations::All(span),
ConstraintCategory::Boring,
self.param_env.and(type_op::ascribe_user_type::AscribeUserType { mir_ty, user_ty }),
self.infcx
.param_env
.and(type_op::ascribe_user_type::AscribeUserType { mir_ty, user_ty }),
);
}
@ -250,7 +252,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
let mir_ty = self.normalize(mir_ty, Locations::All(span));
let cause = ObligationCause::dummy_with_span(span);
let param_env = self.param_env;
let param_env = self.infcx.param_env;
let _: Result<_, ErrorGuaranteed> = self.fully_perform_op(
Locations::All(span),
ConstraintCategory::Boring,

9
compiler/rustc_borrowck/src/type_check/free_region_relations.rs
View File

@ -234,7 +234,7 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
// In the new solver, normalize the type-outlives obligation assumptions.
if self.infcx.next_trait_solver() {
match deeply_normalize(
self.infcx.at(&ObligationCause::misc(span, defining_ty_def_id), self.param_env),
self.infcx.at(&ObligationCause::misc(span, defining_ty_def_id), param_env),
outlives,
) {
Ok(normalized_outlives) => {
@ -274,8 +274,8 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
if let Some(c) = constraints_unnorm {
constraints.push(c)
}
let TypeOpOutput { output: norm_ty, constraints: constraints_normalize, .. } = self
.param_env
let TypeOpOutput { output: norm_ty, constraints: constraints_normalize, .. } =
param_env
.and(type_op::normalize::Normalize { value: ty })
.fully_perform(self.infcx, span)
.unwrap_or_else(|guar| TypeOpOutput {
@ -312,8 +312,7 @@ impl<'tcx> UniversalRegionRelationsBuilder<'_, 'tcx> {
// Add implied bounds from impl header.
if matches!(tcx.def_kind(defining_ty_def_id), DefKind::AssocFn | DefKind::AssocConst) {
for &(ty, _) in tcx.assumed_wf_types(tcx.local_parent(defining_ty_def_id)) {
let result: Result<_, ErrorGuaranteed> = self
.param_env
let result: Result<_, ErrorGuaranteed> = param_env
.and(type_op::normalize::Normalize { value: ty })
.fully_perform(self.infcx, span);
let Ok(TypeOpOutput { output: norm_ty, constraints: c, .. }) = result else {

3
compiler/rustc_borrowck/src/type_check/liveness/trace.rs
View File

@ -608,7 +608,7 @@ impl<'tcx> LivenessContext<'_, '_, '_, 'tcx> {
value.visit_with(&mut for_liveness::FreeRegionsVisitor {
tcx: typeck.tcx(),
param_env: typeck.param_env,
param_env: typeck.infcx.param_env,
op: |r| {
let live_region_vid = typeck.universal_regions.to_region_vid(r);
@ -621,6 +621,7 @@ impl<'tcx> LivenessContext<'_, '_, '_, 'tcx> {
debug!("compute_drop_data(dropped_ty={:?})", dropped_ty,);
match typeck
.infcx
.param_env
.and(DropckOutlives { dropped_ty })
.fully_perform(typeck.infcx, DUMMY_SP)

18
compiler/rustc_borrowck/src/type_check/mod.rs
View File

@ -118,7 +118,6 @@ mod relate_tys;
/// - `elements` -- MIR region map
pub(crate) fn type_check<'a, 'tcx>(
infcx: &BorrowckInferCtxt<'tcx>,
param_env: ty::ParamEnv<'tcx>,
body: &Body<'tcx>,
promoted: &IndexSlice<Promoted, Body<'tcx>>,
universal_regions: UniversalRegions<'tcx>,
@ -147,7 +146,7 @@ pub(crate) fn type_check<'a, 'tcx>(
known_type_outlives_obligations,
} = free_region_relations::create(
infcx,
param_env,
infcx.param_env,
implicit_region_bound,
universal_regions,
&mut constraints,
@ -157,7 +156,6 @@ pub(crate) fn type_check<'a, 'tcx>(
let mut checker = TypeChecker {
infcx,
param_env,
last_span: body.span,
body,
user_type_annotations: &body.user_type_annotations,
@ -828,7 +826,6 @@ impl<'a, 'b, 'tcx> TypeVerifier<'a, 'b, 'tcx> {
/// NLL region checking.
struct TypeChecker<'a, 'tcx> {
infcx: &'a BorrowckInferCtxt<'tcx>,
param_env: ty::ParamEnv<'tcx>,
last_span: Span,
body: &'a Body<'tcx>,
/// User type annotations are shared between the main MIR and the MIR of
@ -1017,7 +1014,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
self.universal_regions,
&self.region_bound_pairs,
self.implicit_region_bound,
self.param_env,
self.infcx.param_env,
&self.known_type_outlives_obligations,
locations,
locations.span(self.body),
@ -1517,9 +1514,10 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
// The signature in this call can reference region variables,
// so erase them before calling a query.
let output_ty = self.tcx().erase_regions(sig.output());
if !output_ty
.is_privately_uninhabited(self.tcx(), self.infcx.typing_env(self.param_env))
{
if !output_ty.is_privately_uninhabited(
self.tcx(),
self.infcx.typing_env(self.infcx.param_env),
) {
span_mirbug!(self, term, "call to converging function {:?} w/o dest", sig);
}
}
@ -1729,7 +1727,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
// `Sized` bound in no way depends on precise regions, so this
// shouldn't affect `is_sized`.
let erased_ty = tcx.erase_regions(ty);
if !erased_ty.is_sized(tcx, self.param_env) {
if !erased_ty.is_sized(tcx, self.infcx.param_env) {
// in current MIR construction, all non-control-flow rvalue
// expressions evaluate through `as_temp` or `into` a return
// slot or local, so to find all unsized rvalues it is enough
@ -2781,7 +2779,7 @@ impl<'a, 'tcx> TypeChecker<'a, 'tcx> {
self.universal_regions,
&self.region_bound_pairs,
self.implicit_region_bound,
self.param_env,
self.infcx.param_env,
&self.known_type_outlives_obligations,
locations,
self.body.span, // irrelevant; will be overridden.

2
compiler/rustc_borrowck/src/type_check/relate_tys.rs
View File

@ -522,7 +522,7 @@ impl<'b, 'tcx> PredicateEmittingRelation<InferCtxt<'tcx>> for NllTypeRelating<'_
}
fn param_env(&self) -> ty::ParamEnv<'tcx> {
self.type_checker.param_env
self.type_checker.infcx.param_env
}
fn register_predicates(

11
compiler/rustc_borrowck/src/universal_regions.rs
View File

@ -248,12 +248,8 @@ impl<'tcx> UniversalRegions<'tcx> {
/// MIR -- that is, all the regions that appear in the function's
/// signature. This will also compute the relationships that are
/// known between those regions.
pub(crate) fn new(
infcx: &BorrowckInferCtxt<'tcx>,
mir_def: LocalDefId,
param_env: ty::ParamEnv<'tcx>,
) -> Self {
UniversalRegionsBuilder { infcx, mir_def, param_env }.build()
pub(crate) fn new(infcx: &BorrowckInferCtxt<'tcx>, mir_def: LocalDefId) -> Self {
UniversalRegionsBuilder { infcx, mir_def }.build()
}
/// Given a reference to a closure type, extracts all the values
@ -426,7 +422,6 @@ impl<'tcx> UniversalRegions<'tcx> {
struct UniversalRegionsBuilder<'infcx, 'tcx> {
infcx: &'infcx BorrowckInferCtxt<'tcx>,
mir_def: LocalDefId,
param_env: ty::ParamEnv<'tcx>,
}
const FR: NllRegionVariableOrigin = NllRegionVariableOrigin::FreeRegion;
@ -435,7 +430,7 @@ impl<'cx, 'tcx> UniversalRegionsBuilder<'cx, 'tcx> {
fn build(self) -> UniversalRegions<'tcx> {
debug!("build(mir_def={:?})", self.mir_def);
let param_env = self.param_env;
let param_env = self.infcx.param_env;
debug!("build: param_env={:?}", param_env);
assert_eq!(FIRST_GLOBAL_INDEX, self.infcx.num_region_vars());