/*Copyright 2014 Francisco Alvaro

This file is part of SESHAT.

  SESHAT 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 3 of the License, or
  (at your option) any later version.

  SESHAT 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 SESHAT.  If not, see <http://www.gnu.org/licenses/>.


This file is a modification of the RNNLIB original software covered by
the following copyright and permission notice:

*/
/*Copyright 2009,2010 Alex Graves

This file is part of RNNLIB.

RNNLIB 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 3 of the License, or
(at your option) any later version.

RNNLIB 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 RNNLIB.  If not, see <http://www.gnu.org/licenses/>.*/

#ifndef _INCLUDED_CopyConnection_h  
#define _INCLUDED_CopyConnection_h  

#include "Connection.hpp"

struct CopyConnection: public Connection
{
	//functions
  CopyConnection(Layer* f, Layer* t, WeightContainer *weight):
		Connection(f->name + "_to_" + t->name, f, t)
	{
		assert(this->from != this->to);
		assert(this->from->output_size() == this->to->input_size());
		assert(this->from->output_size());
		this->to->source = this->from;
		weight->link_layers(this->from->name, this->to->name);
	}
	virtual ~CopyConnection(){}
	void feed_forward(const vector<int>& coords)
	{
		range_plus_equals(this->to->inputActivations[coords], this->from->outputActivations[coords]);
	}
	void feed_back(const vector<int>& coords)
	{
		range_plus_equals(this->from->outputErrors[coords], this->to->inputErrors[coords]);
	}
	void print(ostream& out) const
	{
		Named::print(out);
		out << " (copy)";
	}
};

#endif