py/objfun: Support function attributes on native functions.

Native functions can just reuse the bytecode function attribute code.

Signed-off-by: Damien George <damien@micropython.org>

py/objfun.c

@@ -421,8 +421,14 @@ STATIC const mp_obj_type_t mp_type_fun_native = {
     { &mp_type_type },
     .flags = MP_TYPE_FLAG_BINDS_SELF,
     .name = MP_QSTR_function,
+    #if MICROPY_CPYTHON_COMPAT
+    .print = fun_bc_print,
+    #endif
     .call = fun_native_call,
     .unary_op = mp_generic_unary_op,
+    #if MICROPY_PY_FUNCTION_ATTRS
+    .attr = mp_obj_fun_bc_attr,
+    #endif
 };
 
 mp_obj_t mp_obj_new_fun_native(const mp_obj_t *def_args, const void *fun_data, const mp_module_context_t *mc, struct _mp_raw_code_t *const *child_table) {

tests/micropython/native_fun_attrs.py

@@ -0,0 +1,25 @@
+# test native function attributes
+
+
+def f():
+    pass
+
+
+if not hasattr(f, "__name__"):
+    print("SKIP")
+    raise SystemExit
+
+
+@micropython.native
+def native_f():
+    pass
+
+
+print(type(native_f.__name__))
+print(type(native_f.__globals__))
+print(native_f.__globals__ is globals())
+
+try:
+    native_f.__name__ = None
+except AttributeError:
+    print("AttributeError")

tests/micropython/native_fun_attrs.py.exp

@@ -0,0 +1,4 @@
+<class 'str'>
+<class 'dict'>
+True
+AttributeError

tests/run-tests.py

@@ -603,6 +603,7 @@ def run_tests(pyb, tests, args, result_dir, num_threads=1):
         skip_tests.add("basics/del_deref.py")  # requires checking for unbound local
         skip_tests.add("basics/del_local.py")  # requires checking for unbound local
         skip_tests.add("basics/exception_chain.py")  # raise from is not supported
+        skip_tests.add("basics/fun_name.py")  # requires proper names for native functions
         skip_tests.add("basics/scope_implicit.py")  # requires checking for unbound local
         skip_tests.add("basics/sys_tracebacklimit.py")  # requires traceback info
         skip_tests.add("basics/try_finally_return2.py")  # requires raise_varargs