Use a const ParamEnv when in default_method_body_is_const
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9b45f04414
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3 changed files with 43 additions and 1 deletions
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@ -3,7 +3,7 @@ use rustc_hir as hir;
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use rustc_hir::def_id::{DefId, LocalDefId};
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use rustc_middle::ty::subst::Subst;
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use rustc_middle::ty::{self, Binder, Predicate, PredicateKind, ToPredicate, Ty, TyCtxt};
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use rustc_span::Span;
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use rustc_span::{sym, Span};
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use rustc_trait_selection::traits;
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fn sized_constraint_for_ty<'tcx>(
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@ -285,6 +285,12 @@ fn param_env(tcx: TyCtxt<'_>, def_id: DefId) -> ty::ParamEnv<'_> {
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let constness = match hir_id {
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Some(hir_id) => match tcx.hir().get(hir_id) {
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hir::Node::TraitItem(hir::TraitItem { kind: hir::TraitItemKind::Fn(..), .. })
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if tcx.has_attr(def_id, sym::default_method_body_is_const) =>
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{
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hir::Constness::Const
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}
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hir::Node::Item(hir::Item { kind: hir::ItemKind::Const(..), .. })
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| hir::Node::Item(hir::Item { kind: hir::ItemKind::Static(..), .. })
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| hir::Node::TraitItem(hir::TraitItem {
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