abktempl.h

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/**************************************************************************
***    
*** Copyright (c) 1995-2000 Regents of the University of California,
***               Andrew E. Caldwell, Andrew B. Kahng and Igor L. Markov
*** Copyright (c) 2000-2004 Regents of the University of Michigan,
***               Saurabh N. Adya, Jarrod A. Roy and Igor L. Markov
***
***  Contact author(s): abk@cs.ucsd.edu, imarkov@umich.edu
***  Original Affiliation:   UCLA, Computer Science Department,
***                          Los Angeles, CA 90095-1596 USA
***
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/*
 This file to be included into all projects in the group
 CHANGES
 970820   ilm included templated function clear(Sequence&) by msm
             moved "string stuff" into abkcommon.h
*/
#ifndef  _ABKTEMPL_H_
#define  _ABKTEMPL_H_

/*
 #ifdef __GNUC__
 #if ( __GNUC__ >= 3)
  #include <iostream>
 #else
  #include <iostream>
 #endif
#else
  #include <iostream>
#endif
*/
#include <iostream>
#include <utility>
//#include <pair.h>
#include <vector>

//: Use this class as template argument
class Empty { };
//  when you mean "nothing" (or "no user informathing")

inline std::ostream& operator<<(std::ostream& out, const Empty&) 
{ return out; }
inline std::istream& operator>>(std::istream& in,        Empty&) 
{ return in;  }

const Empty empty=Empty();

template <class T>
inline T abs(const T& a) {
    return  (0 <= a) ? a : -a;
}

template <class T>
inline T square(const T& a) {
    return  a*a;
}

template <class Sequence>
void  deleteAllPointersIn(Sequence& s)
{
   for (typename Sequence::iterator it=s.begin();it!=s.end();it++)
   delete *it; 
}

template <class Iterator>
Iterator next(Iterator i)
{
      return ++i;
}

template <class T>
T clone(const T& t)
{
      return T(t);
}



#endif 

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