From a92ed1eef4a5804c474221d1088dafb5d45f1378 Mon Sep 17 00:00:00 2001
From: Lukas Wirth <lukastw97@gmail.com>
Date: Wed, 16 Jun 2021 19:27:06 +0200
Subject: Don't complete already used derive attributes

---
 .../src/completions/attribute/derive.rs            | 40 +++++++++++-----------
 1 file changed, 20 insertions(+), 20 deletions(-)

(limited to 'crates/ide_completion')

diff --git a/crates/ide_completion/src/completions/attribute/derive.rs b/crates/ide_completion/src/completions/attribute/derive.rs
index c59add6c5..20bbbba46 100644
--- a/crates/ide_completion/src/completions/attribute/derive.rs
+++ b/crates/ide_completion/src/completions/attribute/derive.rs
@@ -31,6 +31,8 @@ pub(super) fn complete_derive(
                 let lookup = components.join(", ");
                 let label = components.iter().rev().join(", ");
                 (label, Some(lookup))
+            } else if existing_derives.contains(&derive) {
+                continue;
             } else {
                 (derive, None)
             };
@@ -139,16 +141,15 @@ pub macro Ord {}
         check(
             r#"#[derive(serde::Serialize, PartialEq, $0)] struct Test;"#,
             expect![[r#"
-            at PartialEq
-            at Default
-            at Eq
-            at Eq, PartialOrd, Ord
-            at Clone, Copy
-            at Debug
-            at Clone
-            at Hash
-            at PartialOrd
-        "#]],
+                at Default
+                at Eq
+                at Eq, PartialOrd, Ord
+                at Clone, Copy
+                at Debug
+                at Clone
+                at Hash
+                at PartialOrd
+            "#]],
         )
     }
 
@@ -157,16 +158,15 @@ pub macro Ord {}
         check(
             r#"#[derive($0 serde::Serialize, PartialEq)] struct Test;"#,
             expect![[r#"
-            at PartialEq
-            at Default
-            at Eq
-            at Eq, PartialOrd, Ord
-            at Clone, Copy
-            at Debug
-            at Clone
-            at Hash
-            at PartialOrd
-        "#]],
+                at Default
+                at Eq
+                at Eq, PartialOrd, Ord
+                at Clone, Copy
+                at Debug
+                at Clone
+                at Hash
+                at PartialOrd
+            "#]],
         )
     }
 }
-- 
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