/usr/include/dlib/svm/null_df.h is in libdlib-dev 18.18-2build1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 | // 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_
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