| /************************************************************** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| |
| |
| /* -*- Mode: C; tab-width: 4; indent-tabs-mode: nil -*- */ |
| #ifndef WW_NEEDED_CAST_HXX |
| #define WW_NEEDED_CAST_HXX |
| |
| #include <tools/debug.hxx> |
| # include "staticassert.hxx" |
| |
| namespace ww |
| { |
| template<typename Ret, typename Param> Ret checking_cast(Param in, Ret) |
| { |
| return static_cast<Ret>(in); |
| } |
| |
| template<typename Ret> Ret checking_cast(Ret in, Ret) |
| { |
| DBG_ASSERT( false, "UnnecessaryCast" ); |
| return in; |
| } |
| |
| /* |
| needed_cast is the same as static_cast except that there will be a compile |
| time assert when NDEBUG is not defined and the in and out types are the |
| same. i.e. needed_cast catches unneccessary casts |
| */ |
| template<typename Ret, typename Param> Ret needed_cast(Param in) |
| { |
| /* |
| Massage a single argument and a ret value into two arguments to allow |
| a determination if the dest type is the same as the sourct type |
| */ |
| return checking_cast(in, Ret()); |
| } |
| } |
| #endif |
| /* vi:set tabstop=4 shiftwidth=4 expandtab: */ |
