VariantCast.h

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#ifndef _SEUTILS_VARIANTCAST_H_
#define _SEUTILS_VARIANTCAST_H_
 
#include <boost/lexical_cast.hpp>
#include <boost/variant/static_visitor.hpp>
#include <boost/variant/apply_visitor.hpp>
 
namespace SourceXtractor {
 
template<typename To>
class VariantCastVisitor : public boost::static_visitor<To> {
public:
  template<typename From>
  To operator()(const From& from) const {
    return boost::lexical_cast<To>(from);
  }
};
 
template<typename To, typename From>
To VariantCast(const From& from) {
  return boost::apply_visitor(VariantCastVisitor<To>(), from);
}
 
} // end of namespace SourceXtractor
 
#endif /* _SEUTILS_VARIANTCAST_H_ */