1 files changed, 95 insertions, 0 deletions
diff --git a/py/objproperty.c b/py/objproperty.c
new file mode 100644
index 0000000000..dd4eedebdb
--- /dev/null
+++ b/py/objproperty.c
@@ -0,0 +1,95 @@
+#include <stdlib.h>
+#include <assert.h>
+
+#include "nlr.h"
+#include "misc.h"
+#include "mpconfig.h"
+#include "qstr.h"
+#include "obj.h"
+#include "runtime.h"
+
+#if MICROPY_ENABLE_PROPERTY
+
+typedef struct _mp_obj_property_t {
+    mp_obj_base_t base;
+    mp_obj_t proxy[3]; // getter, setter, deleter
+} mp_obj_property_t;
+
+STATIC mp_obj_t property_make_new(mp_obj_t type_in, uint n_args, uint n_kw, const mp_obj_t *args) {
+    // TODO check n_kw == 0
+
+    mp_obj_property_t *o = m_new_obj(mp_obj_property_t);
+    o->base.type = &mp_type_property;
+    if (n_args >= 5) {
+        nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError, "property takes at most 4 arguments"));
+    }
+    if (n_args >= 4) {
+        // doc ignored
+    }
+    if (n_args >= 3) {
+        o->proxy[2] = args[2];
+    } else {
+        o->proxy[2] = mp_const_none;
+    }
+    if (n_args >= 2) {
+        o->proxy[1] = args[1];
+    } else {
+        o->proxy[1] = mp_const_none;
+    }
+    if (n_args >= 1) {
+        o->proxy[0] = args[0];
+    } else {
+        o->proxy[0] = mp_const_none;
+    }
+    return o;
+}
+
+STATIC mp_obj_t property_getter(mp_obj_t self_in, mp_obj_t getter) {
+    mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
+    *p2 = *(mp_obj_property_t*)self_in;
+    p2->proxy[0] = getter;
+    return p2;
+}
+
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_getter_obj, property_getter);
+
+STATIC mp_obj_t property_setter(mp_obj_t self_in, mp_obj_t setter) {
+    mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
+    *p2 = *(mp_obj_property_t*)self_in;
+    p2->proxy[1] = setter;
+    return p2;
+}
+
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_setter_obj, property_setter);
+
+STATIC mp_obj_t property_deleter(mp_obj_t self_in, mp_obj_t deleter) {
+    mp_obj_property_t *p2 = m_new_obj(mp_obj_property_t);
+    *p2 = *(mp_obj_property_t*)self_in;
+    p2->proxy[2] = deleter;
+    return p2;
+}
+
+STATIC MP_DEFINE_CONST_FUN_OBJ_2(property_deleter_obj, property_deleter);
+
+STATIC const mp_map_elem_t property_locals_dict_table[] = {
+    { MP_OBJ_NEW_QSTR(MP_QSTR_getter), (mp_obj_t)&property_getter_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_setter), (mp_obj_t)&property_setter_obj },
+    { MP_OBJ_NEW_QSTR(MP_QSTR_deleter), (mp_obj_t)&property_deleter_obj },
+};
+
+STATIC MP_DEFINE_CONST_DICT(property_locals_dict, property_locals_dict_table);
+
+const mp_obj_type_t mp_type_property = {
+    { &mp_type_type },
+    .name = MP_QSTR_property,
+    .make_new = property_make_new,
+    .locals_dict = (mp_obj_t)&property_locals_dict,
+};
+
+const mp_obj_t *mp_obj_property_get(mp_obj_t self_in) {
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_property));
+    mp_obj_property_t *self = self_in;
+    return self->proxy;
+}
+
+#endif // MICROPY_ENABLE_PROPERTY