Move TypeAlias to hir_def

1 files changed, 27 insertions, 0 deletions

diff --git a/crates/ra_hir_def/src/type_alias.rs b/crates/ra_hir_def/src/type_alias.rs
new file mode 100644
index 000000000..c0b49aa7c
--- /dev/null
+++ b/crates/ra_hir_def/src/type_alias.rs
@@ -0,0 +1,27 @@
+//! HIR for type aliases (i.e. the `type` keyword).
+
+use std::sync::Arc;
+
+use hir_expand::name::{AsName, Name};
+
+use ra_syntax::ast::NameOwner;
+
+use crate::{db::DefDatabase2, type_ref::TypeRef, HasSource, Lookup, TypeAliasId};
+
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct TypeAliasData {
+    pub name: Name,
+    pub type_ref: Option<TypeRef>,
+}
+
+impl TypeAliasData {
+    pub(crate) fn type_alias_data_query(
+        db: &impl DefDatabase2,
+        typ: TypeAliasId,
+    ) -> Arc<TypeAliasData> {
+        let node = typ.lookup(db).source(db).value;
+        let name = node.name().map_or_else(Name::missing, |n| n.as_name());
+        let type_ref = node.type_ref().map(TypeRef::from_ast);
+        Arc::new(TypeAliasData { name, type_ref })
+    }
+}