bjoernager/rust
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extract Res to generics_of def_id conversion

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This commit is contained in:
lcnr 2021-10-13 21:31:18 +02:00
parent a240ccd81c
commit 11ec2a47a4
2 changed files with 37 additions and 36 deletions
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33
compiler/rustc_middle/src/ty/util.rs
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@ -17,7 +17,7 @@ use rustc_data_structures::intern::Interned;
use rustc_data_structures::stable_hasher::{HashStable, StableHasher};
use rustc_errors::ErrorReported;
use rustc_hir as hir;
use rustc_hir::def::DefKind;
use rustc_hir::def::{CtorOf, DefKind, Res};
use rustc_hir::def_id::DefId;
use rustc_macros::HashStable;
use rustc_query_system::ich::NodeIdHashingMode;
@ -146,6 +146,37 @@ impl<'tcx> TyCtxt<'tcx> {
hasher.finish()
}
pub fn res_generics_def_id(self, res: Res) -> Option<DefId> {
match res {
Res::Def(DefKind::Ctor(CtorOf::Variant, _), def_id) => {
Some(self.parent(def_id).and_then(|def_id| self.parent(def_id)).unwrap())
}
Res::Def(DefKind::Variant | DefKind::Ctor(CtorOf::Struct, _), def_id) => {
Some(self.parent(def_id).unwrap())
}
// Other `DefKind`s don't have generics and would ICE when calling
// `generics_of`.
Res::Def(
DefKind::Struct
| DefKind::Union
| DefKind::Enum
| DefKind::Trait
| DefKind::OpaqueTy
| DefKind::TyAlias
| DefKind::ForeignTy
| DefKind::TraitAlias
| DefKind::AssocTy
| DefKind::Fn
| DefKind::AssocFn
| DefKind::AssocConst
| DefKind::Impl,
def_id,
) => Some(def_id),
Res::Err => None,
_ => None,
}
}
pub fn has_error_field(self, ty: Ty<'tcx>) -> bool {
if let ty::Adt(def, substs) = *ty.kind() {
for field in def.all_fields() {