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#ifndef DB_SELECTCOMMANDUTIL_IMPL_H
#define DB_SELECTCOMMANDUTIL_IMPL_H
#include "selectcommand.h"
#include <boost/function.hpp>
#include <boost/utility/enable_if.hpp>
namespace DB {
template<typename Fields, typename Func, unsigned int field, typename ... Fn>
inline typename boost::disable_if_c<field < std::tuple_size<Fields>::value>::type
forEachField(DB::SelectCommand *, const Func & func, const Fn & ... args)
{
func(args...);
}
template<typename Fields, typename Func, unsigned int field, typename ... Fn, typename ... Args>
inline typename boost::enable_if_c<field < std::tuple_size<Fields>::value>::type
forEachField(DB::SelectCommand * sel, const Func & func, const Args & ... args)
{
typename std::tuple_element<field, Fields>::type a;
(*sel)[field] >> a;
forEachField<Fields, Func, field + 1, Fn...>(sel, func, args..., a);
}
template<typename ... Fn, typename Func>
inline void SelectCommand::forEachRow(const Func & func)
{
while (fetch()) {
forEachField<std::tuple<Fn...>, Func, 0>(this, func);
}
}
}
#endif
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