Merge #9026

9026: Complete modules in assoc item lists r=Veykril a=Veykril

bors r+

Co-authored-by: Lukas Wirth <lukastw97@gmail.com>

crates/ide_completion/src/completions/macro_in_item_position.rs

@@ -2,6 +2,7 @@
 
 use crate::{CompletionContext, Completions};
 
+// Ideally this should be removed and moved into `(un)qualified_path` respectively
 pub(crate) fn complete_macro_in_item_position(acc: &mut Completions, ctx: &CompletionContext) {
     // Show only macros in top level.
     if !ctx.is_new_item {
@@ -12,6 +13,10 @@ pub(crate) fn complete_macro_in_item_position(acc: &mut Completions, ctx: &Compl
         if let hir::ScopeDef::MacroDef(mac) = res {
             acc.add_macro(ctx, Some(name.to_string()), mac);
         }
+        // FIXME: This should be done in qualified_path/unqualified_path instead?
+        if let hir::ScopeDef::ModuleDef(hir::ModuleDef::Module(_)) = res {
+            acc.add_resolution(ctx, name.to_string(), &res);
+        }
     })
 }
 

crates/ide_completion/src/completions/qualified_path.rs

@@ -7,7 +7,7 @@ use syntax::AstNode;
 use crate::{CompletionContext, Completions};
 
 pub(crate) fn complete_qualified_path(acc: &mut Completions, ctx: &CompletionContext) {
-    if ctx.is_path_disallowed() {
+    if ctx.is_path_disallowed() || ctx.expects_item() {
         return;
     }
     let path = match &ctx.path_qual {
@@ -20,13 +20,16 @@ pub(crate) fn complete_qualified_path(acc: &mut Completions, ctx: &CompletionCon
         None => return,
     };
     let context_module = ctx.scope.module();
-    if ctx.expects_item() || ctx.expects_assoc_item() {
+    if ctx.expects_assoc_item() {
         if let PathResolution::Def(hir::ModuleDef::Module(module)) = resolution {
             let module_scope = module.scope(ctx.db, context_module);
             for (name, def) in module_scope {
                 if let ScopeDef::MacroDef(macro_def) = def {
                     acc.add_macro(ctx, Some(name.to_string()), macro_def);
                 }
+                if let ScopeDef::ModuleDef(hir::ModuleDef::Module(_)) = def {
+                    acc.add_resolution(ctx, name.to_string(), &def);
+                }
             }
         }
         return;
@@ -614,24 +617,43 @@ fn main() { let _ = crate::$0 }
     }
 
     #[test]
-    fn completes_qualified_macros_in_impl() {
+    fn completes_in_assoc_item_list() {
         check(
             r#"
 #[macro_export]
 macro_rules! foo { () => {} }
+mod bar {}
 
 struct MyStruct {}
-
 impl MyStruct {
     crate::$0
 }
 "#,
             expect![[r##"
+                md bar
                 ma foo! #[macro_export] macro_rules! foo
             "##]],
         );
     }
 
+    #[test]
+    #[ignore] // FIXME doesn't complete anything atm
+    fn completes_in_item_list() {
+        check(
+            r#"
+struct MyStruct {}
+macro_rules! foo {}
+mod bar {}
+
+crate::$0
+"#,
+            expect![[r#"
+                md bar
+                ma foo! macro_rules! foo
+            "#]],
+        )
+    }
+
     #[test]
     fn test_super_super_completion() {
         check(

crates/ide_completion/src/completions/unqualified_path.rs

@@ -9,14 +9,17 @@ pub(crate) fn complete_unqualified_path(acc: &mut Completions, ctx: &CompletionC
     if !ctx.is_trivial_path {
         return;
     }
-    if ctx.is_path_disallowed() {
+    if ctx.is_path_disallowed() || ctx.expects_item() {
         return;
     }
-    if ctx.expects_item() || ctx.expects_assoc_item() {
+    if ctx.expects_assoc_item() {
         ctx.scope.process_all_names(&mut |name, def| {
             if let ScopeDef::MacroDef(macro_def) = def {
                 acc.add_macro(ctx, Some(name.to_string()), macro_def);
             }
+            if let ScopeDef::ModuleDef(hir::ModuleDef::Module(_)) = def {
+                acc.add_resolution(ctx, name.to_string(), &def);
+            }
         });
         return;
     }
@@ -672,19 +675,39 @@ impl My$0
     }
 
     #[test]
-    fn only_completes_macros_in_assoc_item_list() {
+    fn completes_in_assoc_item_list() {
         check(
             r#"
-struct MyStruct {}
 macro_rules! foo {}
+mod bar {}
 
+struct MyStruct {}
 impl MyStruct {
     $0
 }
 "#,
             expect![[r#"
+                md bar
                 ma foo! macro_rules! foo
             "#]],
         )
     }
+
+    // FIXME: The completions here currently come from `macro_in_item_position`, but they shouldn't
+    #[test]
+    fn completes_in_item_list() {
+        check(
+            r#"
+struct MyStruct {}
+macro_rules! foo {}
+mod bar {}
+
+$0
+"#,
+            expect![[r#"
+                md bar
+                ma foo!(…) macro_rules! foo
+            "#]],
+        )
+    }
 }

crates/ide_completion/src/patterns.rs

@@ -62,7 +62,6 @@ pub(crate) fn determine_location(tok: SyntaxToken) -> Option<ImmediateLocation>
             ast::SourceFile(_it) => ImmediateLocation::ItemList,
             ast::ItemList(_it) => ImmediateLocation::ItemList,
             ast::RefExpr(_it) => ImmediateLocation::RefExpr,
-            ast::RefPat(_it) => ImmediateLocation::RefExpr,
             ast::RecordField(_it) => ImmediateLocation::RecordField,
             ast::AssocItemList(it) => match it.syntax().parent().map(|it| it.kind()) {
                 Some(IMPL) => ImmediateLocation::Impl,