Improve `AdtDef` interning.

This commit makes `AdtDef` use `Interned`. Much the commit is tedious
changes to introduce getter functions. The interesting changes are in
`compiler/rustc_middle/src/ty/adt.rs`.

2 files changed, 6 insertions, 6 deletions

diff --git a/clippy_lints/src/casts/cast_possible_truncation.rs b/clippy_lints/src/casts/cast_possible_truncation.rs
index 9b189ea1ef8..421bd6f53f7 100644
--- a/clippy_lints/src/casts/cast_possible_truncation.rs
+++ b/clippy_lints/src/casts/cast_possible_truncation.rs
@@ -116,15 +116,15 @@ pub(super) fn check(cx: &LateContext<'_>, expr: &Expr<'_>, cast_expr: &Expr<'_>,
                 && let Res::Def(DefKind::Ctor(..), id) = cx.qpath_res(p, cast_expr.hir_id)
             {
                 let i = def.variant_index_with_ctor_id(id);
-                let variant = &def.variants[i];
-                let nbits = utils::enum_value_nbits(get_discriminant_value(cx.tcx, def, i));
+                let variant = def.variant(i);
+                let nbits = utils::enum_value_nbits(get_discriminant_value(cx.tcx, *def, i));
                 (nbits, Some(variant))
             } else {
-                (utils::enum_ty_to_nbits(def, cx.tcx), None)
+                (utils::enum_ty_to_nbits(*def, cx.tcx), None)
             };
             let to_nbits = utils::int_ty_to_nbits(cast_to, cx.tcx);
 
-            let cast_from_ptr_size = def.repr.int.map_or(true, |ty| {
+            let cast_from_ptr_size = def.repr().int.map_or(true, |ty| {
                 matches!(
                     ty,
                     IntType::SignedInt(ast::IntTy::Isize) | IntType::UnsignedInt(ast::UintTy::Usize)
diff --git a/clippy_lints/src/casts/utils.rs b/clippy_lints/src/casts/utils.rs
index bbed766c47a..5a4f20f0990 100644
--- a/clippy_lints/src/casts/utils.rs
+++ b/clippy_lints/src/casts/utils.rs
@@ -34,10 +34,10 @@ pub(super) fn enum_value_nbits(value: EnumValue) -> u64 {
     .into()
 }
 
-pub(super) fn enum_ty_to_nbits(adt: &AdtDef, tcx: TyCtxt<'_>) -> u64 {
+pub(super) fn enum_ty_to_nbits(adt: AdtDef<'_>, tcx: TyCtxt<'_>) -> u64 {
     let mut explicit = 0i128;
     let (start, end) = adt
-        .variants
+        .variants()
         .iter()
         .fold((0, i128::MIN), |(start, end), variant| match variant.discr {
             VariantDiscr::Relative(x) => match explicit.checked_add(i128::from(x)) {