From 413c3e10b4a046493e648686e8d355db95e8846b Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Sun, 19 Jun 2016 00:01:59 +0300
Subject: [PATCH] py/objtype: instance: Inherit protocol vtable from a base
class.
This allows to define an abstract base class which would translate
C-level protocol to Python method calls, and any subclass inheriting
from it will support this feature. This in particular actually enables
recently introduced machine.PinBase class.
---
py/objtype.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/py/objtype.c b/py/objtype.c
index 2f14c387d..3020ed513 100644
--- a/py/objtype.c
+++ b/py/objtype.c
@@ -914,7 +914,11 @@ mp_obj_t mp_obj_new_type(qstr name, mp_obj_t bases_tuple, mp_obj_t locals_dict)
o->getiter = instance_getiter;
//o->iternext = ; not implemented
o->buffer_p.get_buffer = instance_get_buffer;
- //o->stream_p = ; not implemented
+ // Inherit protocol from a base class. This allows to define an
+ // abstract base class which would translate C-level protocol to
+ // Python method calls, and any subclass inheriting from it will
+ // support this feature.
+ o->protocol = ((mp_obj_type_t*)MP_OBJ_TO_PTR(items[0]))->protocol;
o->bases_tuple = MP_OBJ_TO_PTR(bases_tuple);
o->locals_dict = MP_OBJ_TO_PTR(locals_dict);
--
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