1 files changed, 10 insertions, 8 deletions

diff --git a/crates/ra_ide_api/src/completion/complete_fn_param.rs b/crates/ra_ide_api/src/completion/complete_fn_param.rs
index 6639b6fff..3e936e3ec 100644
--- a/crates/ra_ide_api/src/completion/complete_fn_param.rs
+++ b/crates/ra_ide_api/src/completion/complete_fn_param.rs
@@ -1,7 +1,6 @@
-use ra_syntax::{
-    algo::visit::{visitor_ctx, VisitorCtx},
-    ast, AstNode,
-};
+//! FIXME: write short doc here
+
+use ra_syntax::{ast, match_ast, AstNode};
 use rustc_hash::FxHashMap;
 
 use crate::completion::{CompletionContext, CompletionItem, CompletionKind, Completions};
@@ -17,10 +16,13 @@ pub(super) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
 
     let mut params = FxHashMap::default();
     for node in ctx.token.parent().ancestors() {
-        let _ = visitor_ctx(&mut params)
-            .visit::<ast::SourceFile, _>(process)
-            .visit::<ast::ItemList, _>(process)
-            .accept(&node);
+        match_ast! {
+            match node {
+                ast::SourceFile(it) => { process(it, &mut params) },
+                ast::ItemList(it) => { process(it, &mut params) },
+                _ => (),
+            }
+        }
     }
     params
         .into_iter()