/* -*- Mode: protobuf; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*-
 * vim: set ts=8 sts=4 et sw=4 tw=99: */

syntax = "proto2";

message ViaOneOf {
    oneof Alternatives {
        Data present = 1;
        bool absent  = 2;
    }

    message Data {
        required ViaOneOf self_reference = 1;
    }
}

message ViaOptional {
    optional Data data = 1;

    message Data {
        required ViaOptional self_reference = 1;
    }
}