5 files changed, 63 insertions, 13 deletions

diff --git a/crates/ra_hir_ty/src/traits.rs b/crates/ra_hir_ty/src/traits.rs
index 2a6d7faef..786f758e9 100644
--- a/crates/ra_hir_ty/src/traits.rs
+++ b/crates/ra_hir_ty/src/traits.rs
@@ -2,6 +2,7 @@
 use std::sync::Arc;
 
 use chalk_ir::cast::Cast;
+use chalk_solve::Solver;
 use hir_def::{
     expr::ExprId, lang_item::LangItemTarget, DefWithBodyId, ImplId, TraitId, TypeAliasId,
 };
@@ -32,9 +33,10 @@ struct ChalkContext<'a> {
     krate: CrateId,
 }
 
-fn create_chalk_solver() -> chalk_solve::Solver<Interner> {
-    let solver_choice = chalk_solve::SolverChoice::recursive();
-    solver_choice.into_solver()
+fn create_chalk_solver() -> chalk_recursive::RecursiveSolver<Interner> {
+    let overflow_depth = 100;
+    let caching_enabled = true;
+    chalk_recursive::RecursiveSolver::new(overflow_depth, caching_enabled)
 }
 
 /// A set of clauses that we assume to be true. E.g. if we are inside this function:
diff --git a/crates/ra_hir_ty/src/traits/chalk.rs b/crates/ra_hir_ty/src/traits/chalk.rs
index c97b81d57..a9b39474a 100644
--- a/crates/ra_hir_ty/src/traits/chalk.rs
+++ b/crates/ra_hir_ty/src/traits/chalk.rs
@@ -3,7 +3,7 @@ use std::sync::Arc;
 
 use log::debug;
 
-use chalk_ir::{fold::shift::Shift, GenericArg, TypeName};
+use chalk_ir::{fold::shift::Shift, GenericArg, TypeName, CanonicalVarKinds};
 use chalk_solve::rust_ir::{self, OpaqueTyDatumBound, WellKnownTrait};
 
 use hir_def::{
@@ -66,10 +66,13 @@ impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
         &self,
         trait_id: TraitId,
         parameters: &[GenericArg<Interner>],
+        _binders: &CanonicalVarKinds<Interner>,
     ) -> Vec<ImplId> {
         debug!("impls_for_trait {:?}", trait_id);
         let trait_: hir_def::TraitId = from_chalk(self.db, trait_id);
 
+        // FIXME use binders to look for int/float impls when necessary
+
         let ty: Ty = from_chalk(self.db, parameters[0].assert_ty_ref(&Interner).clone());
 
         let self_ty_fp = TyFingerprint::for_impl(&ty);
@@ -219,6 +222,22 @@ impl<'a> chalk_solve::RustIrDatabase<Interner> for ChalkContext<'a> {
         // FIXME: implement closure support
         unimplemented!()
     }
+
+    fn trait_name(&self, _trait_id: chalk_ir::TraitId<Interner>) -> String {
+        unimplemented!()
+    }
+    fn adt_name(&self, _struct_id: chalk_ir::AdtId<Interner>) -> String {
+        unimplemented!()
+    }
+    fn assoc_type_name(&self, _assoc_ty_id: chalk_ir::AssocTypeId<Interner>) -> String {
+        unimplemented!()
+    }
+    fn opaque_type_name(&self, _opaque_ty_id: chalk_ir::OpaqueTyId<Interner>) -> String {
+        unimplemented!()
+    }
+    fn fn_def_name(&self, _fn_def_id: chalk_ir::FnDefId<Interner>) -> String {
+        unimplemented!()
+    }
 }
 
 pub(crate) fn program_clauses_for_chalk_env_query(
@@ -354,12 +373,21 @@ pub(crate) fn struct_datum_query(
         fundamental: false,
         phantom_data: false,
     };
+    // FIXME provide enum variants properly (for auto traits)
+    let variant = rust_ir::AdtVariantDatum {
+        fields: Vec::new(), // FIXME add fields (only relevant for auto traits),
+    };
     let struct_datum_bound = rust_ir::AdtDatumBound {
-        fields: Vec::new(), // FIXME add fields (only relevant for auto traits)
+        variants: vec![variant],
         where_clauses,
     };
-    let struct_datum =
-        StructDatum { id: struct_id, binders: make_binders(struct_datum_bound, num_params), flags };
+    let struct_datum = StructDatum {
+        // FIXME set ADT kind
+        kind: rust_ir::AdtKind::Struct,
+        id: struct_id,
+        binders: make_binders(struct_datum_bound, num_params),
+        flags
+    };
     Arc::new(struct_datum)
 }
 
diff --git a/crates/ra_hir_ty/src/traits/chalk/interner.rs b/crates/ra_hir_ty/src/traits/chalk/interner.rs
index 15426b022..156b691b4 100644
--- a/crates/ra_hir_ty/src/traits/chalk/interner.rs
+++ b/crates/ra_hir_ty/src/traits/chalk/interner.rs
@@ -39,6 +39,7 @@ impl chalk_ir::interner::Interner for Interner {
     type InternedQuantifiedWhereClauses = Vec<chalk_ir::QuantifiedWhereClause<Self>>;
     type InternedVariableKinds = Vec<chalk_ir::VariableKind<Self>>;
     type InternedCanonicalVarKinds = Vec<chalk_ir::CanonicalVarKind<Self>>;
+    type InternedConstraints = Vec<chalk_ir::InEnvironment<chalk_ir::Constraint<Self>>>;
     type DefId = InternId;
     type InternedAdtId = crate::TypeCtorId;
     type Identifier = TypeAliasId;
@@ -349,6 +350,20 @@ impl chalk_ir::interner::Interner for Interner {
     ) -> &'a [chalk_ir::CanonicalVarKind<Self>] {
         &canonical_var_kinds
     }
+
+    fn intern_constraints<E>(
+        &self,
+        data: impl IntoIterator<Item = Result<chalk_ir::InEnvironment<chalk_ir::Constraint<Self>>, E>>,
+    ) -> Result<Self::InternedConstraints, E> {
+        data.into_iter().collect()
+    }
+
+    fn constraints_data<'a>(
+        &self,
+        constraints: &'a Self::InternedConstraints,
+    ) -> &'a [chalk_ir::InEnvironment<chalk_ir::Constraint<Self>>] {
+        constraints
+    }
 }
 
 impl chalk_ir::interner::HasInterner for Interner {
diff --git a/crates/ra_hir_ty/src/traits/chalk/mapping.rs b/crates/ra_hir_ty/src/traits/chalk/mapping.rs
index 433d6aa03..bc0c6de17 100644
--- a/crates/ra_hir_ty/src/traits/chalk/mapping.rs
+++ b/crates/ra_hir_ty/src/traits/chalk/mapping.rs
@@ -61,7 +61,7 @@ impl ToChalk for Ty {
             Ty::Bound(idx) => chalk_ir::TyData::BoundVar(idx).intern(&Interner),
             Ty::Infer(_infer_ty) => panic!("uncanonicalized infer ty"),
             Ty::Dyn(predicates) => {
-                let where_clauses = chalk_ir::QuantifiedWhereClauses::from(
+                let where_clauses = chalk_ir::QuantifiedWhereClauses::from_iter(
                     &Interner,
                     predicates.iter().filter(|p| !p.is_error()).cloned().map(|p| p.to_chalk(db)),
                 );
@@ -152,7 +152,7 @@ fn ref_to_chalk(
     let lifetime = LIFETIME_PLACEHOLDER.to_lifetime(&Interner);
     chalk_ir::ApplicationTy {
         name: TypeName::Ref(mutability.to_chalk(db)),
-        substitution: chalk_ir::Substitution::from(
+        substitution: chalk_ir::Substitution::from_iter(
             &Interner,
             vec![lifetime.cast(&Interner), arg.cast(&Interner)],
         ),
@@ -177,7 +177,7 @@ impl ToChalk for Substs {
     type Chalk = chalk_ir::Substitution<Interner>;
 
     fn to_chalk(self, db: &dyn HirDatabase) -> chalk_ir::Substitution<Interner> {
-        chalk_ir::Substitution::from(&Interner, self.iter().map(|ty| ty.clone().to_chalk(db)))
+        chalk_ir::Substitution::from_iter(&Interner, self.iter().map(|ty| ty.clone().to_chalk(db)))
     }
 
     fn from_chalk(db: &dyn HirDatabase, parameters: chalk_ir::Substitution<Interner>) -> Substs {
@@ -492,6 +492,11 @@ impl ToChalk for GenericPredicate {
                 // we shouldn't get these from Chalk
                 panic!("encountered LifetimeOutlives from Chalk")
             }
+
+            chalk_ir::WhereClause::TypeOutlives(_) => {
+                // we shouldn't get these from Chalk
+                panic!("encountered TypeOutlives from Chalk")
+            }
         }
     }
 }
@@ -570,7 +575,7 @@ where
                 )
             });
         let value = self.value.to_chalk(db);
-        chalk_ir::Canonical { value, binders: chalk_ir::CanonicalVarKinds::from(&Interner, kinds) }
+        chalk_ir::Canonical { value, binders: chalk_ir::CanonicalVarKinds::from_iter(&Interner, kinds) }
     }
 
     fn from_chalk(db: &dyn HirDatabase, canonical: chalk_ir::Canonical<T::Chalk>) -> Canonical<T> {
@@ -691,7 +696,7 @@ where
     T: HasInterner<Interner = Interner>,
 {
     chalk_ir::Binders::new(
-        chalk_ir::VariableKinds::from(
+        chalk_ir::VariableKinds::from_iter(
             &Interner,
             std::iter::repeat(chalk_ir::VariableKind::Ty(chalk_ir::TyKind::General)).take(num_vars),
         ),
diff --git a/crates/ra_hir_ty/src/traits/chalk/tls.rs b/crates/ra_hir_ty/src/traits/chalk/tls.rs
index e6a9d3211..1e226baea 100644
--- a/crates/ra_hir_ty/src/traits/chalk/tls.rs
+++ b/crates/ra_hir_ty/src/traits/chalk/tls.rs
@@ -157,7 +157,7 @@ impl DebugContext<'_> {
             _ => panic!("associated type not in trait"),
         };
         let trait_data = self.0.trait_data(trait_);
-        let params = projection_ty.substitution.parameters(&Interner);
+        let params = projection_ty.substitution.as_slice(&Interner);
         write!(fmt, "<{:?} as {}", &params[0], trait_data.name,)?;
         if params.len() > 1 {
             write!(