Add lowering of array lengths in types

Now e.g.

```rust
fn a(b: [u8; 2]) {
}
```

will know about the length of b.

1 files changed, 2 insertions, 1 deletions

diff --git a/crates/hir_ty/src/interner.rs b/crates/hir_ty/src/interner.rs
index 4cbc9cd4f..7b4119747 100644
--- a/crates/hir_ty/src/interner.rs
+++ b/crates/hir_ty/src/interner.rs
@@ -1,11 +1,12 @@
 //! Implementation of the Chalk `Interner` trait, which allows customizing the
 //! representation of the various objects Chalk deals with (types, goals etc.).
 
-use crate::{chalk_db, consts::ConstScalar, tls, GenericArg};
+use crate::{chalk_db, tls, GenericArg};
 use base_db::salsa::InternId;
 use chalk_ir::{Goal, GoalData};
 use hir_def::{
     intern::{impl_internable, InternStorage, Internable, Interned},
+    type_ref::ConstScalar,
     TypeAliasId,
 };
 use smallvec::SmallVec;