|  | // Protocol Buffers - Google's data interchange format | 
|  | // Copyright 2025 Google LLC.  All rights reserved. | 
|  | // | 
|  | // Use of this source code is governed by a BSD-style | 
|  | // license that can be found in the LICENSE file or at | 
|  | // https://developers.google.com/open-source/licenses/bsd | 
|  |  | 
|  | #ifndef GOOGLE_PROTOBUF_HPB_MULTIBACKEND_H__ | 
|  | #define GOOGLE_PROTOBUF_HPB_MULTIBACKEND_H__ | 
|  |  | 
|  | #define HPB_INTERNAL_BACKEND_UPB 1 | 
|  | #define HPB_INTERNAL_BACKEND_CPP 2 | 
|  |  | 
|  | namespace hpb { | 
|  | namespace internal { | 
|  | namespace backend { | 
|  | namespace upb {} | 
|  | namespace cpp {} | 
|  | }  // namespace backend | 
|  | }  // namespace internal | 
|  |  | 
|  | #if HPB_INTERNAL_BACKEND == HPB_INTERNAL_BACKEND_UPB | 
|  | namespace backend = hpb::internal::backend::upb; | 
|  | #elif HPB_INTERNAL_BACKEND == HPB_INTERNAL_BACKEND_CPP | 
|  | namespace backend = hpb::internal::backend::cpp; | 
|  | #else | 
|  | #error "Unsupported hpb backend" | 
|  | #endif | 
|  | }  // namespace hpb | 
|  |  | 
|  | #endif  // GOOGLE_PROTOBUF_HPB_MULTIBACKEND_H__ |