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-rw-r--r--crates/hir_ty/src/builder.rs10
1 files changed, 5 insertions, 5 deletions
diff --git a/crates/hir_ty/src/builder.rs b/crates/hir_ty/src/builder.rs
index 09512d1ce..9a698898b 100644
--- a/crates/hir_ty/src/builder.rs
+++ b/crates/hir_ty/src/builder.rs
@@ -4,6 +4,7 @@ use std::iter;
4 4
5use chalk_ir::{ 5use chalk_ir::{
6 cast::{Cast, CastTo, Caster}, 6 cast::{Cast, CastTo, Caster},
7 fold::Fold,
7 interner::HasInterner, 8 interner::HasInterner,
8 AdtId, BoundVar, DebruijnIndex, Safety, Scalar, 9 AdtId, BoundVar, DebruijnIndex, Safety, Scalar,
9}; 10};
@@ -32,8 +33,7 @@ impl<D> TyBuilder<D> {
32 33
33 fn build_internal(self) -> (D, Substitution) { 34 fn build_internal(self) -> (D, Substitution) {
34 assert_eq!(self.vec.len(), self.param_count); 35 assert_eq!(self.vec.len(), self.param_count);
35 // FIXME: would be good to have a way to construct a chalk_ir::Substitution from the interned form 36 let subst = Substitution::from_iter(&Interner, self.vec);
36 let subst = Substitution::intern(self.vec);
37 (self.data, subst) 37 (self.data, subst)
38 } 38 }
39 39
@@ -141,7 +141,7 @@ impl TyBuilder<hir_def::AdtId> {
141 self.vec.push(fallback().cast(&Interner)); 141 self.vec.push(fallback().cast(&Interner));
142 } else { 142 } else {
143 // each default can depend on the previous parameters 143 // each default can depend on the previous parameters
144 let subst_so_far = Substitution::intern(self.vec.clone()); 144 let subst_so_far = Substitution::from_iter(&Interner, self.vec.clone());
145 self.vec 145 self.vec
146 .push(default_ty.clone().substitute(&Interner, &subst_so_far).cast(&Interner)); 146 .push(default_ty.clone().substitute(&Interner, &subst_so_far).cast(&Interner));
147 } 147 }
@@ -196,13 +196,13 @@ impl TyBuilder<TypeAliasId> {
196 } 196 }
197} 197}
198 198
199impl<T: TypeWalk + HasInterner<Interner = Interner>> TyBuilder<Binders<T>> { 199impl<T: HasInterner<Interner = Interner> + Fold<Interner>> TyBuilder<Binders<T>> {
200 fn subst_binders(b: Binders<T>) -> Self { 200 fn subst_binders(b: Binders<T>) -> Self {
201 let param_count = b.binders.len(&Interner); 201 let param_count = b.binders.len(&Interner);
202 TyBuilder::new(b, param_count) 202 TyBuilder::new(b, param_count)
203 } 203 }
204 204
205 pub fn build(self) -> T { 205 pub fn build(self) -> <T as Fold<Interner>>::Result {
206 let (b, subst) = self.build_internal(); 206 let (b, subst) = self.build_internal();
207 b.substitute(&Interner, &subst) 207 b.substitute(&Interner, &subst)
208 } 208 }