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/**************************************************************
*
* 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 unnecessary 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
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