ceph/src/rocksdb/util/cast_util.h

   1 //  Copyright (c) 2011-present, Facebook, Inc.  All rights reserved.
   2 //  This source code is licensed under both the GPLv2 (found in the
   3 //  COPYING file in the root directory) and Apache 2.0 License
   4 //  (found in the LICENSE.Apache file in the root directory).
   5
   6 #pragma once
   7 namespace ROCKSDB_NAMESPACE {
   8 // The helper function to assert the move from dynamic_cast<> to
   9 // static_cast<> is correct. This function is to deal with legacy code.
  10 // It is not recommended to add new code to issue class casting. The preferred
  11 // solution is to implement the functionality without a need of casting.
  12 template <class DestClass, class SrcClass>
  13 inline DestClass* static_cast_with_check(SrcClass* x) {
  14   DestClass* ret = static_cast<DestClass*>(x);
  15 #ifdef ROCKSDB_USE_RTTI
  16   assert(ret == dynamic_cast<DestClass*>(x));
  17 #endif
  18   return ret;
  19 }
  20 }  // namespace ROCKSDB_NAMESPACE