fix #685

Author: xuhuanzy

crates/emmylua_ls/src/handlers/completion/providers/function_provider.rs

@@ -710,10 +710,6 @@ fn add_str_tpl_ref_completion(
         .filter(|type_decl| {
             // 检查泛型约束
             let current_type = LuaType::Ref(type_decl.get_id());
-            // 去掉约束自身
-            if extend_type == current_type {
-                return false;
-            }
             builder
                 .semantic_model
                 .type_check(&extend_type, &current_type)

crates/emmylua_ls/src/handlers/test/completion_test.rs

@@ -643,6 +643,11 @@ mod tests {
                     kind: CompletionItemKind::ENUM_MEMBER,
                     ..Default::default()
                 },
+                VirtualCompletionItem {
+                    label: "\"Component\"".to_string(),
+                    kind: CompletionItemKind::ENUM_MEMBER,
+                    ..Default::default()
+                },
                 VirtualCompletionItem {
                     label: "\"D\"".to_string(),
                     kind: CompletionItemKind::ENUM_MEMBER,
@@ -654,6 +659,44 @@ mod tests {
         Ok(())
     }
 
+    #[test]
+    fn test_str_tpl_ref_4() {
+        let mut ws = ProviderVirtualWorkspace::new_with_init_std_lib();
+        ws.def(
+            r#"
+            ---@class C: string
+
+            ---@class D: C
+            "#,
+        );
+        assert!(ws.check_completion_with_kind(
+            r#"
+            ---@generic T: string
+            ---@param name `T`
+            ---@return T
+            local function new(name)
+                return name
+            end
+
+            local a = new(<??>)
+            "#,
+            vec![
+                VirtualCompletionItem {
+                    label: "\"C\"".to_string(),
+                    kind: CompletionItemKind::ENUM_MEMBER,
+                    ..Default::default()
+                },
+                VirtualCompletionItem {
+                    label: "\"D\"".to_string(),
+                    kind: CompletionItemKind::ENUM_MEMBER,
+                    ..Default::default()
+                },
+            ],
+            CompletionTriggerKind::TRIGGER_CHARACTER,
+        ));
+    }
+    
+
     #[gtest]
     fn test_table_field_function_1() -> Result<()> {
         let mut ws = ProviderVirtualWorkspace::new_with_init_std_lib();