55 lines
1.3 KiB
C++
55 lines
1.3 KiB
C++
//
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// Copyright (C) 2001-2004 Graeme Walker <graeme_walker@users.sourceforge.net>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License
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// as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later
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// version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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// ===
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//
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// gconvert.h
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//
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#ifndef G_CONVERT_H
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#define G_CONVERT_H
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#include "gdef.h"
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#include "gexception.h"
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namespace G
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{
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G_EXCEPTION( ConvertOverflow , "arithmetic overflow" ) ;
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// Template function: G::Convert
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// Description: Does arithmetic conversions with
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// overflow checking.
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// See also: boost::numeric_cast<>()
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//
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template <class Tout, class Tin>
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inline
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Tout Convert( const Tin & in )
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{
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Tout out = in ;
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Tin copy = out ;
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if( in != copy )
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throw ConvertOverflow( std::ostringstream() << in ) ;
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return out ;
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}
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}
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#endif
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