1 files changed, 21 insertions, 0 deletions

diff --git a/crates/ra_analysis/src/hir/function/imp.rs b/crates/ra_analysis/src/hir/function/imp.rs
new file mode 100644
index 000000000..cd573a47f
--- /dev/null
+++ b/crates/ra_analysis/src/hir/function/imp.rs
@@ -0,0 +1,21 @@
+use std::sync::Arc;
+
+use ra_syntax::ast::{AstNode, FnDef, FnDefNode};
+
+use crate::hir::{
+    function::{FnId, FnScopes},
+    DescriptorDatabase,
+};
+
+/// Resolve `FnId` to the corresponding `SyntaxNode`
+pub(crate) fn fn_syntax(db: &impl DescriptorDatabase, fn_id: FnId) -> FnDefNode {
+    let ptr = db.id_maps().fn_ptr(fn_id);
+    let syntax = db.resolve_syntax_ptr(ptr);
+    FnDef::cast(syntax.borrowed()).unwrap().owned()
+}
+
+pub(crate) fn fn_scopes(db: &impl DescriptorDatabase, fn_id: FnId) -> Arc<FnScopes> {
+    let syntax = db._fn_syntax(fn_id);
+    let res = FnScopes::new(syntax.borrowed());
+    Arc::new(res)
+}