py: Add attrtuple object, for space-efficient tuples with attr access.

If you need the functionality of a namedtuple but will only make 1 or a
few instances, then use an attrtuple instead.

1 files changed, 15 insertions, 0 deletions

diff --git a/py/objtuple.h b/py/objtuple.h
index 5fb82ba529..8c4d41ed32 100644
--- a/py/objtuple.h
+++ b/py/objtuple.h
@@ -40,4 +40,19 @@ mp_obj_t mp_obj_tuple_binary_op(mp_uint_t op, mp_obj_t lhs, mp_obj_t rhs);
 mp_obj_t mp_obj_tuple_subscr(mp_obj_t base, mp_obj_t index, mp_obj_t value);
 mp_obj_t mp_obj_tuple_getiter(mp_obj_t o_in);
 
+extern const mp_obj_type_t mp_type_attrtuple;
+
+#define MP_DEFINE_ATTRTUPLE(tuple_obj_name, fields, nitems, ...) \
+    const mp_obj_tuple_t tuple_obj_name = { \
+        .base = {&mp_type_attrtuple}, \
+        .len = nitems, \
+        .items = { __VA_ARGS__ , (void*)fields } \
+    }
+
+#if MICROPY_PY_COLLECTIONS
+void mp_obj_attrtuple_print_helper(const mp_print_t *print, const qstr *fields, mp_obj_tuple_t *o);
+#endif
+
+mp_obj_t mp_obj_new_attrtuple(const qstr *fields, mp_uint_t n, const mp_obj_t *items);
+
 #endif // __MICROPY_INCLUDED_PY_OBJTUPLE_H__