// Copyright (C) 2010 Davis E. King (davis@dlib.net)
// License: Boost Software License See LICENSE.txt for the full license.
#ifndef DLIB_NULL_DECISION_FUnCTION_Hh_
#define DLIB_NULL_DECISION_FUnCTION_Hh_
#include <iostream>
namespace dlib
{
// ----------------------------------------------------------------------------------------
struct null_df
{
/*!
WHAT THIS OBJECT REPRESENTS
This is a type used to represent an unused field in the list of template
arguments of the one_vs_one_decision_function and one_vs_all_decision_function
templates. As such, null_df doesn't actually do anything.
!*/
template <typename T>
double operator() ( const T&) const { return 0; }
};
inline void serialize(const null_df&, std::ostream&) {}
inline void deserialize(null_df&, std::istream&) {}
// ----------------------------------------------------------------------------------------
}
#endif // DLIB_NULL_DECISION_FUnCTION_Hh_