Exclude special files

Author: SomeoneToIgnore

crates/base_db/src/lib.rs

@@ -172,17 +172,22 @@ impl<T: SourceDatabaseExt> FileLoader for FileLoaderDelegate<&'_ T> {
             Some(("mod", Some("rs"))) | Some(("lib", Some("rs"))) => {
                 module_files.list_files_with_extensions(module_file, None)
             }
+            // TODO kb for `src/bin/foo.rs`, we need to check for modules in `src/bin/`
             Some((directory_with_module_name, Some("rs"))) => module_files
                 .list_files_with_extensions(
                     module_file,
                     Some(&format!("../{}/", directory_with_module_name)),
                 ),
+            // TODO kb also consider the case when there's no `../module_name.rs`, but `../module_name/mod.rs`
             _ => Vec::new(),
         };
 
         possible_submodule_files
             .into_iter()
             .filter(|(_, extension)| extension == &Some("rs"))
+            .filter(|(file_name, _)| file_name != &"mod")
+            .filter(|(file_name, _)| file_name != &"lib")
+            .filter(|(file_name, _)| file_name != &"main")
             .map(|(file_name, _)| file_name.to_owned())
             .collect()
     }

crates/ide/src/completion/completion_context.rs

@@ -117,9 +117,6 @@ impl<'a> CompletionContext<'a> {
                 .to_module_def(position.file_id)
                 .and_then(|current_module| {
                     let definition_source = current_module.definition_source(db);
-                    if !matches!(definition_source.value, ModuleSource::SourceFile(_)) {
-                        return None;
-                    }
                     let module_definition_source_file = definition_source.file_id.original_file(db);
                     let mod_declaration_candidates =
                         db.possible_sudmobule_names(module_definition_source_file);