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/*************************************************************************
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* Copyright 2000, 2010 Oracle and/or its affiliates.
*
* OpenOffice.org - a multi-platform office productivity suite
*
* This file is part of OpenOffice.org.
*
* OpenOffice.org is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 3
* only, as published by the Free Software Foundation.
*
* OpenOffice.org is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License version 3 for more details
* (a copy is included in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU Lesser General Public License
* version 3 along with OpenOffice.org. If not, see
* <http://www.openoffice.org/license.html>
* for a copy of the LGPLv3 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: */
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