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       1             : /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
       2             : /*
       3             :  * This file is part of the LibreOffice project.
       4             :  *
       5             :  * This Source Code Form is subject to the terms of the Mozilla Public
       6             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       7             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
       8             :  *
       9             :  * This file incorporates work covered by the following license notice:
      10             :  *
      11             :  *   Licensed to the Apache Software Foundation (ASF) under one or more
      12             :  *   contributor license agreements. See the NOTICE file distributed
      13             :  *   with this work for additional information regarding copyright
      14             :  *   ownership. The ASF licenses this file to you under the Apache
      15             :  *   License, Version 2.0 (the "License"); you may not use this file
      16             :  *   except in compliance with the License. You may obtain a copy of
      17             :  *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
      18             :  */
      19             : 
      20             : #ifndef WW_NEEDED_CAST_HXX
      21             : #define WW_NEEDED_CAST_HXX
      22             : 
      23             : #include "staticassert.hxx"
      24             : 
      25             : namespace ww
      26             : {
      27       13504 :     template<typename Ret, typename Param> Ret checking_cast(Param in, Ret)
      28             :     {
      29       13504 :         return static_cast<Ret>(in);
      30             :     }
      31             : 
      32             :     template<typename Ret> Ret checking_cast(Ret in, Ret)
      33             :     {
      34             :         OSL_ENSURE( false, "UnnecessaryCast" );
      35             :         return in;
      36             :     }
      37             : 
      38             :     /*
      39             :      needed_cast is the same as static_cast except that there will be a compile
      40             :      time assert when NDEBUG is not defined and the in and out types are the
      41             :      same.  i.e. needed_cast catches unneccessary casts
      42             :     */
      43       13504 :     template<typename Ret, typename Param> Ret needed_cast(Param in)
      44             :     {
      45             :         /*
      46             :          Massage a single argument and a ret value into two arguments to allow
      47             :          a determination if the dest type is the same as the sourct type
      48             :         */
      49       13504 :         return checking_cast(in, Ret());
      50             :     }
      51             : }
      52             : #endif
      53             : 
      54             : /* vim:set shiftwidth=4 softtabstop=4 expandtab: */