add ref postfix template

Author: matklad

crates/ra_ide_api/src/completion/complete_postfix.rs

@@ -30,6 +30,7 @@ pub(super) fn complete_postfix(acc: &mut Completions, ctx: &CompletionContext) {
     if let Some(dot_receiver) = ctx.dot_receiver {
         let receiver_text = dot_receiver.syntax().text().to_string();
         postfix_snippet(ctx, "not", &format!("!{}", receiver_text)).add_to(acc);
+        postfix_snippet(ctx, "ref", &format!("&{}", receiver_text)).add_to(acc);
         postfix_snippet(ctx, "if", &format!("if {} {{$0}}", receiver_text)).add_to(acc);
         postfix_snippet(
             ctx,

crates/ra_ide_api/src/completion/snapshots/completion_item__postfix_completion_works_for_trivial_path_expression.snap

@@ -1,8 +1,8 @@
 ---
-created: "2019-02-03T11:38:42.897384636+00:00"
-creator: insta@0.5.3
-expression: kind_completions
+created: "2019-02-14T17:12:57.412523988Z"
+creator: insta@0.6.2
 source: crates/ra_ide_api/src/completion/completion_item.rs
+expression: kind_completions
 ---
 [
     CompletionItem {
@@ -97,6 +97,29 @@ source: crates/ra_ide_api/src/completion/completion_item.rs
             }
         )
     },
+    CompletionItem {
+        completion_kind: Postfix,
+        label: "ref",
+        kind: None,
+        detail: None,
+        documentation: None,
+        lookup: None,
+        insert_text: Some(
+            "&bar"
+        ),
+        insert_text_format: Snippet,
+        source_range: [76; 76),
+        text_edit: Some(
+            TextEdit {
+                atoms: [
+                    AtomTextEdit {
+                        delete: [72; 76),
+                        insert: ""
+                    }
+                ]
+            }
+        )
+    },
     CompletionItem {
         completion_kind: Postfix,
         label: "while",