use rustc_data_structures::fx::FxHashSet;
use rustc_hir::def_id::{DefId, LocalDefId};
use rustc_infer::infer::outlives::env::OutlivesEnvironment;
-use rustc_infer::infer::{InferCtxt, RegionckMode, TyCtxtInferExt};
+use rustc_infer::infer::{InferCtxt, TyCtxtInferExt};
use rustc_infer::traits::specialization_graph::Node;
use rustc_middle::ty::subst::{GenericArg, InternalSubsts, SubstsRef};
use rustc_middle::ty::trait_def::TraitSpecializationKind;
use rustc_span::Span;
use rustc_trait_selection::traits::{self, translate_substs, wf};
-pub(super) fn check_min_specialization(tcx: TyCtxt<'_>, impl_def_id: DefId, span: Span) {
+pub(super) fn check_min_specialization(tcx: TyCtxt<'_>, impl_def_id: LocalDefId) {
if let Some(node) = parent_specialization_node(tcx, impl_def_id) {
tcx.infer_ctxt().enter(|infcx| {
- check_always_applicable(&infcx, impl_def_id, node, span);
+ check_always_applicable(&infcx, impl_def_id, node);
});
}
}
-fn parent_specialization_node(tcx: TyCtxt<'_>, impl1_def_id: DefId) -> Option<Node> {
+fn parent_specialization_node(tcx: TyCtxt<'_>, impl1_def_id: LocalDefId) -> Option<Node> {
let trait_ref = tcx.impl_trait_ref(impl1_def_id)?;
let trait_def = tcx.trait_def(trait_ref.def_id);
- let impl2_node = trait_def.ancestors(tcx, impl1_def_id).ok()?.nth(1)?;
+ let impl2_node = trait_def.ancestors(tcx, impl1_def_id.to_def_id()).ok()?.nth(1)?;
let always_applicable_trait =
matches!(trait_def.specialization_kind, TraitSpecializationKind::AlwaysApplicable);
}
/// Check that `impl1` is a sound specialization
-fn check_always_applicable(
- infcx: &InferCtxt<'_, '_>,
- impl1_def_id: DefId,
- impl2_node: Node,
- span: Span,
-) {
- if let Some((impl1_substs, impl2_substs)) =
- get_impl_substs(infcx, impl1_def_id, impl2_node, span)
- {
+fn check_always_applicable(infcx: &InferCtxt<'_, '_>, impl1_def_id: LocalDefId, impl2_node: Node) {
+ if let Some((impl1_substs, impl2_substs)) = get_impl_substs(infcx, impl1_def_id, impl2_node) {
let impl2_def_id = impl2_node.def_id();
debug!(
"check_always_applicable(\nimpl1_def_id={:?},\nimpl2_def_id={:?},\nimpl2_substs={:?}\n)",
unconstrained_parent_impl_substs(tcx, impl2_def_id, impl2_substs)
};
+ let span = tcx.def_span(impl1_def_id);
check_static_lifetimes(tcx, &parent_substs, span);
check_duplicate_params(tcx, impl1_substs, &parent_substs, span);
-
- check_predicates(
- infcx,
- impl1_def_id.expect_local(),
- impl1_substs,
- impl2_node,
- impl2_substs,
- span,
- );
+ check_predicates(infcx, impl1_def_id, impl1_substs, impl2_node, impl2_substs, span);
}
}
/// Would return `S1 = [C]` and `S2 = [Vec<C>, C]`.
fn get_impl_substs<'tcx>(
infcx: &InferCtxt<'_, 'tcx>,
- impl1_def_id: DefId,
+ impl1_def_id: LocalDefId,
impl2_node: Node,
- span: Span,
) -> Option<(SubstsRef<'tcx>, SubstsRef<'tcx>)> {
let tcx = infcx.tcx;
let param_env = tcx.param_env(impl1_def_id);
- let impl1_substs = InternalSubsts::identity_for_item(tcx, impl1_def_id);
- let impl2_substs = translate_substs(infcx, param_env, impl1_def_id, impl1_substs, impl2_node);
+ let impl1_substs = InternalSubsts::identity_for_item(tcx, impl1_def_id.to_def_id());
+ let impl2_substs =
+ translate_substs(infcx, param_env, impl1_def_id.to_def_id(), impl1_substs, impl2_node);
// Conservatively use an empty `ParamEnv`.
let outlives_env = OutlivesEnvironment::new(ty::ParamEnv::empty());
- infcx.resolve_regions_and_report_errors(impl1_def_id, &outlives_env, RegionckMode::default());
+ infcx.resolve_regions_and_report_errors(impl1_def_id.to_def_id(), &outlives_env);
let Ok(impl2_substs) = infcx.fully_resolve(impl2_substs) else {
+ let span = tcx.def_span(impl1_def_id);
tcx.sess.emit_err(SubstsOnOverriddenImpl { span });
return None;
};