From 1914b7723f2f77a7259c65c888107e95f00d0ba1 Mon Sep 17 00:00:00 2001
From: Lukas Wirth <lukastw97@gmail.com>
Date: Wed, 3 Mar 2021 21:58:48 +0100
Subject: Don't complete `super` unless its valid in paths

---
 crates/ide_completion/src/completions/attribute.rs |  3 ++-
 crates/ide_completion/src/completions/fn_param.rs  | 27 ++++++++++------------
 crates/ide_completion/src/completions/keyword.rs   | 27 ++++++++++++++++------
 3 files changed, 34 insertions(+), 23 deletions(-)

diff --git a/crates/ide_completion/src/completions/attribute.rs b/crates/ide_completion/src/completions/attribute.rs
index 3a5bc4381..cb05e85fc 100644
--- a/crates/ide_completion/src/completions/attribute.rs
+++ b/crates/ide_completion/src/completions/attribute.rs
@@ -39,7 +39,8 @@ pub(crate) fn complete_attribute(acc: &mut Completions, ctx: &CompletionContext)
 }
 
 fn complete_attribute_start(acc: &mut Completions, ctx: &CompletionContext, attribute: &ast::Attr) {
-    for attr_completion in ATTRIBUTES {
+    let is_inner = attribute.kind() == ast::AttrKind::Inner;
+    for attr_completion in ATTRIBUTES.iter().filter(|compl| is_inner || !compl.prefer_inner) {
         let mut item = CompletionItem::new(
             CompletionKind::Attribute,
             ctx.source_range(),
diff --git a/crates/ide_completion/src/completions/fn_param.rs b/crates/ide_completion/src/completions/fn_param.rs
index 38e33a93e..1bcc8727f 100644
--- a/crates/ide_completion/src/completions/fn_param.rs
+++ b/crates/ide_completion/src/completions/fn_param.rs
@@ -25,9 +25,12 @@ pub(crate) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
             return;
         }
         func.param_list().into_iter().flat_map(|it| it.params()).for_each(|param| {
-            let text = param.syntax().text().to_string();
-            params.entry(text).or_insert(param);
-        })
+            if let Some(pat) = param.pat() {
+                let text = param.syntax().text().to_string();
+                let lookup = pat.syntax().text().to_string();
+                params.entry(text).or_insert(lookup);
+            }
+        });
     };
 
     for node in ctx.token.parent().ancestors() {
@@ -50,18 +53,12 @@ pub(crate) fn complete_fn_param(acc: &mut Completions, ctx: &CompletionContext)
         };
     }
 
-    params
-        .into_iter()
-        .filter_map(|(label, param)| {
-            let lookup = param.pat()?.syntax().text().to_string();
-            Some((label, lookup))
-        })
-        .for_each(|(label, lookup)| {
-            CompletionItem::new(CompletionKind::Magic, ctx.source_range(), label)
-                .kind(CompletionItemKind::Binding)
-                .lookup_by(lookup)
-                .add_to(acc)
-        });
+    params.into_iter().for_each(|(label, lookup)| {
+        CompletionItem::new(CompletionKind::Magic, ctx.source_range(), label)
+            .kind(CompletionItemKind::Binding)
+            .lookup_by(lookup)
+            .add_to(acc)
+    });
 }
 
 #[cfg(test)]
diff --git a/crates/ide_completion/src/completions/keyword.rs b/crates/ide_completion/src/completions/keyword.rs
index eb81f9765..17bd19522 100644
--- a/crates/ide_completion/src/completions/keyword.rs
+++ b/crates/ide_completion/src/completions/keyword.rs
@@ -1,5 +1,7 @@
 //! Completes keywords.
 
+use std::iter;
+
 use syntax::SyntaxKind;
 use test_utils::mark;
 
@@ -19,10 +21,14 @@ pub(crate) fn complete_use_tree_keyword(acc: &mut Completions, ctx: &CompletionC
         CompletionItem::new(CompletionKind::Keyword, source_range, "self")
             .kind(CompletionItemKind::Keyword)
             .add_to(acc);
-        CompletionItem::new(CompletionKind::Keyword, source_range, "super::")
-            .kind(CompletionItemKind::Keyword)
-            .insert_text("super::")
-            .add_to(acc);
+        if iter::successors(ctx.path_qual.clone(), |p| p.qualifier())
+            .all(|p| p.segment().and_then(|s| s.super_token()).is_some())
+        {
+            CompletionItem::new(CompletionKind::Keyword, source_range, "super::")
+                .kind(CompletionItemKind::Keyword)
+                .insert_text("super::")
+                .add_to(acc);
+        }
     }
 
     // Suggest .await syntax for types that implement Future trait
@@ -204,8 +210,16 @@ mod tests {
             "#]],
         );
 
+        // FIXME: `self` shouldn't be shown here and the check below
         check(
             r"use a::$0",
+            expect![[r#"
+            kw self
+        "#]],
+        );
+
+        check(
+            r"use super::$0",
             expect![[r#"
                 kw self
                 kw super::
@@ -215,9 +229,8 @@ mod tests {
         check(
             r"use a::{b, $0}",
             expect![[r#"
-                kw self
-                kw super::
-            "#]],
+            kw self
+        "#]],
         );
     }
 
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