Merge #8348

8348: Make `Binders` more like Chalk r=flodiebold a=flodiebold

Working towards #8313.
 - hide `value`
 - use `VariableKinds`
 - adjust `subst` to be like Chalk's `substitute`
 - also clean up some other `TypeWalk` stuff to prepare for it being replaced by Chalk's `Fold`

Co-authored-by: Florian Diebold <[email protected]>

1 files changed, 5 insertions, 5 deletions

diff --git a/crates/hir/src/lib.rs b/crates/hir/src/lib.rs
index b14c9a675..003821981 100644
--- a/crates/hir/src/lib.rs
+++ b/crates/hir/src/lib.rs
@@ -516,7 +516,7 @@ impl Field {
             VariantDef::Variant(it) => it.parent.id.into(),
         };
         let substs = TyBuilder::type_params_subst(db, generic_def_id);
-        let ty = db.field_types(var_id)[self.id].clone().subst(&substs);
+        let ty = db.field_types(var_id)[self.id].clone().substitute(&Interner, &substs);
         Type::new(db, self.parent.module(db).id.krate(), var_id, ty)
     }
 
@@ -702,7 +702,7 @@ impl_from!(Struct, Union, Enum for Adt);
 impl Adt {
     pub fn has_non_default_type_params(self, db: &dyn HirDatabase) -> bool {
         let subst = db.generic_defaults(self.into());
-        subst.iter().any(|ty| ty.value.is_unknown())
+        subst.iter().any(|ty| ty.skip_binders().is_unknown())
     }
 
     /// Turns this ADT into a type. Any type parameters of the ADT will be
@@ -1089,7 +1089,7 @@ pub struct TypeAlias {
 impl TypeAlias {
     pub fn has_non_default_type_params(self, db: &dyn HirDatabase) -> bool {
         let subst = db.generic_defaults(self.id.into());
-        subst.iter().any(|ty| ty.value.is_unknown())
+        subst.iter().any(|ty| ty.skip_binders().is_unknown())
     }
 
     pub fn module(self, db: &dyn HirDatabase) -> Module {
@@ -1503,7 +1503,7 @@ impl TypeParam {
         let krate = self.id.parent.module(db.upcast()).krate();
         let ty = params.get(local_idx)?.clone();
         let subst = TyBuilder::type_params_subst(db, self.id.parent);
-        let ty = ty.subst(&subst.prefix(local_idx));
+        let ty = ty.substitute(&Interner, &subst.prefix(local_idx));
         Some(Type::new_with_resolver_inner(db, krate, &resolver, ty))
     }
 }
@@ -1916,7 +1916,7 @@ impl Type {
             .iter()
             .map(|(local_id, ty)| {
                 let def = Field { parent: variant_id.into(), id: local_id };
-                let ty = ty.clone().subst(substs);
+                let ty = ty.clone().substitute(&Interner, substs);
                 (def, self.derived(ty))
             })
             .collect()