Update of /cvsroot/objecthandler/ObjectHandler/oh/Conversions
In directory sc8-pr-cvs3.sourceforge.net:/tmp/cvs-serv29592/oh/Conversions
Added Files:
coerce.hpp
Log Message:
support for coercion
--- NEW FILE: coerce.hpp ---
/*
Copyright (C) 2006 Eric Ehlers
This file is part of QuantLib, a free-software/open-source library
for financial quantitative analysts and developers - http://quantlib.org/
QuantLib is free software: you can redistribute it and/or modify it under the
terms of the QuantLib license. You should have received a copy of the
license along with this program; if not, please email qua...@li...
The license is also available online at http://quantlib.org/html/license.html
This program 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 license for more details.
*/
#ifndef oh_conversions_coerce_hpp
#define oh_conversions_coerce_hpp
#include <oh/exception.hpp>
#include <sstream>
namespace ObjHandler {
template <class TypeIn, class TypeOut>
class Coerce {
public:
TypeOut operator()(const TypeIn &in) {
Conversion *conversion = getConversions();
TypeOut out;
while (conversion) {
if ((*conversion)(in, out))
return out;
conversion++;
}
std::ostringstream msg;
msg << "Unable to coerce value to type "
<< typeid(TypeOut).name();
throw Exception(msg.str());
}
protected:
typedef bool (*Conversion)(const TypeIn&, TypeOut&);
virtual Conversion *getConversions() = 0;
};
}
#endif
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