Give a better name for the protocol in eval_call

tests/test_call.py

@@ -17,9 +17,8 @@ def test_call_1():
     ret = eval_call(func, a=1, b=2, c="aaa")
     fmt = format_helper.format_class(ret)
 
-    # XXX: We want better than this for a name
     assert fmt == textwrap.dedent("""\
-        class NewProtocol:
+        class func[...]:
             a: int
             b: int
             c: int

typemap/type_eval/_eval_call.py

@@ -11,11 +11,17 @@
 
 
 def eval_call(func: types.FunctionType, /, *args: Any, **kwargs: Any) -> Any:
-    with _eval_typing._ensure_context():
-        return _eval_call(func, *args, **kwargs)
+    with _eval_typing._ensure_context() as ctx:
+        return _eval_call(func, ctx, *args, **kwargs)
 
 
-def _eval_call(func: types.FunctionType, /, *args: Any, **kwargs: Any) -> Any:
+def _eval_call(
+    func: types.FunctionType,
+    ctx: _eval_typing.EvalContext,
+    /,
+    *args: Any,
+    **kwargs: Any,
+) -> Any:
     vars: dict[str, Any] = {}
 
     params = func.__type_params__
@@ -39,6 +45,11 @@ def _eval_call(func: types.FunctionType, /, *args: Any, **kwargs: Any) -> Any:
     ff = types.FunctionType(
         af.__code__, af.__globals__, af.__name__, None, af_args
     )
-    rr = ff(annotationlib.Format.VALUE)
 
-    return _eval_typing.eval_typing(rr["return"])
+    old_obj = ctx.current_alias
+    ctx.current_alias = func
+    try:
+        rr = ff(annotationlib.Format.VALUE)
+        return _eval_typing.eval_typing(rr["return"])
+    finally:
+        ctx.current_alias = old_obj

typemap/type_eval/_eval_typing.py

@@ -22,7 +22,9 @@
 @dataclasses.dataclass
 class EvalContext:
     seen: dict[Any, Any]
-    current_alias: types.GenericAlias | None = None
+    # The typing.Any is really a types.FunctionType, but mypy gets
+    # confused and wants to treat it as a MethodType.
+    current_alias: types.GenericAlias | typing.Any | None = None
 
 
 # `eval_types()` calls can be nested, context must be preserved

typemap/typing.py

@@ -95,7 +95,10 @@ def __getitem__(cls, val: list[Property]):
         # If the type evaluation context
         ctx = type_eval._get_current_context()
         if ctx.current_alias:
-            name = str(ctx.current_alias)
+            if isinstance(ctx.current_alias, types.GenericAlias):
+                name = str(ctx.current_alias)
+            else:
+                name = f"{ctx.current_alias.__name__}[...]"
             module_name = ctx.current_alias.__module__
 
         dct["__module__"] = module_name