Don't duplicate parens in patterns

1 files changed, 32 insertions, 1 deletions

diff --git a/crates/ra_ide/src/completion/presentation.rs b/crates/ra_ide/src/completion/presentation.rs
index e23971526..64349dcb8 100644
--- a/crates/ra_ide/src/completion/presentation.rs
+++ b/crates/ra_ide/src/completion/presentation.rs
@@ -384,10 +384,17 @@ impl Builder {
         if !ctx.config.add_call_parenthesis {
             return self;
         }
-        if ctx.use_item_syntax.is_some() || ctx.is_call {
+        if ctx.use_item_syntax.is_some() {
             mark::hit!(no_parens_in_use_item);
             return self;
         }
+        if ctx.is_pattern_call {
+            mark::hit!(dont_duplicate_pattern_parens);
+            return self;
+        }
+        if ctx.is_call {
+            return self;
+        }
 
         // Don't add parentheses if the expected type is some function reference.
         if let Some(ty) = &ctx.expected_type {
@@ -908,6 +915,30 @@ fn main(value: Option<i32>) {
     }
 
     #[test]
+    fn dont_duplicate_pattern_parens() {
+        mark::check!(dont_duplicate_pattern_parens);
+        check_edit(
+            "Var",
+            r#"
+enum E { Var(i32) }
+fn main() {
+    match E::Var(92) {
+        E::<|>(92) => (),
+    }
+}
+"#,
+            r#"
+enum E { Var(i32) }
+fn main() {
+    match E::Var(92) {
+        E::Var(92) => (),
+    }
+}
+"#,
+        );
+    }
+
+    #[test]
     fn no_call_parens_if_fn_ptr_needed() {
         mark::check!(no_call_parens_if_fn_ptr_needed);
         check_edit(