rustc_ty_utils/
common_traits.rs1use rustc_hir::lang_items::LangItem;
4use rustc_infer::infer::TyCtxtInferExt;
5use rustc_middle::query::Providers;
6use rustc_middle::ty::{self, Ty, TyCtxt};
7use rustc_span::DUMMY_SP;
8use rustc_trait_selection::traits;
9
10fn is_copy_raw<'tcx>(tcx: TyCtxt<'tcx>, query: ty::PseudoCanonicalInput<'tcx, Ty<'tcx>>) -> bool {
11 is_item_raw(tcx, query, LangItem::Copy)
12}
13
14fn is_use_cloned_raw<'tcx>(
15 tcx: TyCtxt<'tcx>,
16 query: ty::PseudoCanonicalInput<'tcx, Ty<'tcx>>,
17) -> bool {
18 is_item_raw(tcx, query, LangItem::UseCloned)
19}
20
21fn is_sized_raw<'tcx>(tcx: TyCtxt<'tcx>, query: ty::PseudoCanonicalInput<'tcx, Ty<'tcx>>) -> bool {
22 is_item_raw(tcx, query, LangItem::Sized)
23}
24
25fn is_freeze_raw<'tcx>(tcx: TyCtxt<'tcx>, query: ty::PseudoCanonicalInput<'tcx, Ty<'tcx>>) -> bool {
26 is_item_raw(tcx, query, LangItem::Freeze)
27}
28
29fn is_unpin_raw<'tcx>(tcx: TyCtxt<'tcx>, query: ty::PseudoCanonicalInput<'tcx, Ty<'tcx>>) -> bool {
30 is_item_raw(tcx, query, LangItem::Unpin)
31}
32
33fn is_async_drop_raw<'tcx>(
34 tcx: TyCtxt<'tcx>,
35 query: ty::PseudoCanonicalInput<'tcx, Ty<'tcx>>,
36) -> bool {
37 is_item_raw(tcx, query, LangItem::AsyncDrop)
38}
39
40fn is_item_raw<'tcx>(
41 tcx: TyCtxt<'tcx>,
42 query: ty::PseudoCanonicalInput<'tcx, Ty<'tcx>>,
43 item: LangItem,
44) -> bool {
45 let (infcx, param_env) = tcx.infer_ctxt().build_with_typing_env(query.typing_env);
46 let trait_def_id = tcx.require_lang_item(item, DUMMY_SP);
47 traits::type_known_to_meet_bound_modulo_regions(&infcx, param_env, query.value, trait_def_id)
48}
49
50pub(crate) fn provide(providers: &mut Providers) {
51 *providers = Providers {
52 is_copy_raw,
53 is_use_cloned_raw,
54 is_sized_raw,
55 is_freeze_raw,
56 is_unpin_raw,
57 is_async_drop_raw,
58 ..*providers
59 };
60}