Add const type inference

1 files changed, 26 insertions, 0 deletions

diff --git a/crates/ra_hir/src/code_model_impl/konst.rs b/crates/ra_hir/src/code_model_impl/konst.rs
new file mode 100644
index 000000000..ee03e3374
--- /dev/null
+++ b/crates/ra_hir/src/code_model_impl/konst.rs
@@ -0,0 +1,26 @@
+use std::sync::Arc;

+

+use ra_syntax::ast::{NameOwner};

+

+use crate::{

+    Name, AsName, Const, ConstSignature,

+    type_ref::{TypeRef},

+    PersistentHirDatabase,

+};

+

+impl ConstSignature {

+    pub(crate) fn const_signature_query(

+        db: &impl PersistentHirDatabase,

+        konst: Const,

+    ) -> Arc<ConstSignature> {

+        let (_, node) = konst.source(db);

+

+        let name = node.name().map(|n| n.as_name()).unwrap_or_else(Name::missing);

+

+        let type_ref = TypeRef::from_ast_opt(node.type_ref());

+

+        let sig = ConstSignature { name, type_ref };

+

+        Arc::new(sig)

+    }

+}