Null.cc

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/*
 * $Id: Null.cc 138 2013-06-29 15:10:53Z jdl3 $
 * Copyright (C) 2013 John D Lamb
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or (at
 * your option) any later version.
 * 
 * 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 GNU
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#ifdef HAVE_CONFIG_H
#  include<config.h>
#endif

#include"Null.hpp"

using namespace ipo_function::concrete;

NullFunction::NullFunction() : FunctionBase { 0 }{}

double
NullFunction::operator()( gsl::vector const& vector ){ return 0; }

gsl::vector
NullFunction::gradient( gsl::vector const& vector ){
  return gsl::vector( static_cast<size_t>( 0 ) ); }

gsl::matrix
NullFunction::hessian( gsl::vector const& vector ){ return gsl::matrix { 0, 0 }; }