Add support for associated type bindings (`where Trait<Type = X>`)

1 files changed, 7 insertions, 0 deletions

diff --git a/crates/ra_hir/src/ty/traits/chalk.rs b/crates/ra_hir/src/ty/traits/chalk.rs
index 2ebc06135..3ab5b7cca 100644
--- a/crates/ra_hir/src/ty/traits/chalk.rs
+++ b/crates/ra_hir/src/ty/traits/chalk.rs
@@ -211,6 +211,13 @@ impl ToChalk for GenericPredicate {
             GenericPredicate::Implemented(trait_ref) => {
                 make_binders(chalk_ir::WhereClause::Implemented(trait_ref.to_chalk(db)), 0)
             }
+            GenericPredicate::Projection(projection_pred) => make_binders(
+                chalk_ir::WhereClause::ProjectionEq(chalk_ir::ProjectionEq {
+                    projection: projection_pred.projection_ty.to_chalk(db),
+                    ty: projection_pred.ty.to_chalk(db),
+                }),
+                0,
+            ),
             GenericPredicate::Error => {
                 let impossible_trait_ref = chalk_ir::TraitRef {
                     trait_id: UNKNOWN_TRAIT,