STLIO.h

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//# STLIO.h: text output IO for any STL-like container
//# Copyright (C) 2011
//# Associated Universities, Inc. Washington DC, USA.
//# 
//# This library is free software; you can redistribute it and/or modify it
//# under the terms of the GNU Library General Public License as published by
//# the Free Software Foundation; either version 2 of the License, or (at your
//# option) any later version.
//# 
//# This library 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 Library General Public
//# License for more details.
//# 
//# You should have received a copy of the GNU Library General Public License
//# along with this library; if not, write to the Free Software Foundation,
//# Inc., 675 Massachusetts Ave, Cambridge, MA 02139, USA.
//# 
//# Correspondence concerning AIPS++ should be addressed as follows:
//#        Internet email: aips2-request@nrao.edu.
//#        Postal address: AIPS++ Project Office
//#                        National Radio Astronomy Observatory
//#                        520 Edgemont Road
//#                        Charlottesville, VA 22903-2475 USA
//#
//# $Id: STLIO.h 21331 2013-03-26 15:08:06Z gervandiepen $

#ifndef CASA_STLIO_H
#define CASA_STLIO_H

//# Includes
#include <casacore/casa/aips.h>
#include <casacore/casa/iostream.h>
#include <casacore/casa/Logging/LogIO.h>
#include <vector>
#include <set>
#include <list>
#include <map>

namespace casacore { //# NAMESPACE CASACORE - BEGIN

  //# Forward Declarations
  class AipsIO;

  template <typename T, typename U>
  inline ostream& operator<< (ostream& os, const std::pair<T,U>& p);

  template<typename T>
  inline ostream& operator<<(ostream& os, const std::vector<T>& v);

  template<typename T>
  inline ostream& operator<<(ostream& os, const std::set<T>& v);

  template<typename T>
  inline ostream& operator<<(ostream& os, const std::list<T>& v);

  template<typename T, typename U>
  inline ostream& operator<<(ostream& os, const std::map<T,U>& m);

  // <summary>
  //    Input/output operators for STL-like containers.
  // </summary>

  // <use visibility=export>

  // <reviewed reviewer="Paul Shannon" date="1995/02/21" tests="" demos="">
  // </reviewed>

  // <prerequisite>
  //   <li> STL container concept
  // </prerequisite>

  // <synopsis> 
  // The function <src>showContainer</src> makes it possible to show
  // any STL-like container (having forward iterators) on an ostream.
  // This include casacore classes like Array, IPosition, and Block, but
  // also STL classes like vector. The separator, prefix, and postfix
  // can be defined at will (they default to , [ ]).
  //
  // The function <src>showDataIter</src> is similar to
  // <src>showContainer</src>, but uses iterators directly.
  // </synopsis>

  // <example>
  // <srcblock>
  // IPosition shape (3,10,10,3);
  // showContainer (cout, shape);
  // </srcblock>
  //
  // <motivation>
  // Effortless input/output is clearly a big win.
  // </motivation>
  //
  // <group name="Container IO">

  // Write out an ascii representation of any container using the
  // given begin and end iterator.
  // An arbitrary separator, prefix, and postfix can be given.
  // E.g. for separator ', ' the output looks like [1, 2, 3].
  template<class ITER> void showDataIter (ostream&,
                                          ITER begin, const ITER& end,
                                          const char* separator=",",
                                          const char* prefix="[",
                                          const char* postfix="]");

  // Write out an ascii representation of any container having a
  // forward iterator.
  // Note that a multi-dimensional Array object is linearized.
  // An arbitrary separator, prefix, and postfix can be given.
  // E.g. for separator ', ' the output looks like [1, 2, 3].
  template<class CONTAINER> void showContainer (ostream& os, const CONTAINER& c,
                                                const char* separator=",",
                                                const char* prefix="[",
                                                const char* postfix="]")
    { showDataIter (os, c.begin(), c.end(), separator, prefix, postfix); }

  // Write a std::pair.
  template <typename T, typename U>
  inline ostream& operator<< (ostream& os, const std::pair<T,U>& p)
  {
    os << '<' << p.first << ',' << p.second << '>';
    return os;
  }

  // Write the contents of a vector enclosed in square brackets, using a comma
  // as separator.
  template<typename T>
  inline ostream& operator<<(ostream& os, const std::vector<T>& v)
  {
    showContainer (os, v, ",", "[", "]");
    return os;
  }

  // Write the contents of a set enclosed in square brackets, using a comma
  // as separator.
  template<typename T>
  inline ostream& operator<<(ostream& os, const std::set<T>& v)
  {
    showContainer (os, v, ",", "[", "]");
    return os;
  }

  // Write the contents of a list enclosed in square brackets, using a comma
  // as separator.
  template<typename T>
  inline ostream& operator<<(ostream& os, const std::list<T>& v)
  {
    showContainer (os, v, ",", "[", "]");
    return os;
  }

  // Print the contents of a map enclosed in braces, using a comma
  // as separator.
  template<typename T, typename U>
  inline ostream& operator<<(ostream& os, const std::map<T,U>& m)
  {
    showContainer (os, m, ", ", "{", "}");
    return os;
  }

  // Print the contents of a container on LogIO.
  // <group>
  template<typename T>
  inline LogIO& operator<<(LogIO &os, const std::vector<T> &a)
    { os.output() << a; return os; }
  template<typename T>
  inline LogIO& operator<<(LogIO &os, const std::set<T> &a)
    { os.output() << a; return os; }
  template<typename T>
  inline LogIO& operator<<(LogIO &os, const std::list<T> &a)
    { os.output() << a; return os; }
  template<typename T, typename U>
  inline LogIO& operator<<(LogIO& os, const std::map<T,U>& a)
    { os.output() << a; return os; }
  // </group>

  // Read or write the contents of an STL vector from/to AipsIO.
  // The container is written in the same way as Block,
  // thus can be read back that way and vice-versa.
  // <group>
  template<typename T>
  AipsIO& operator>> (AipsIO& ios, std::vector<T>&);
  template<typename T>
  AipsIO& operator<< (AipsIO& ios, const std::vector<T>&);
  // </group>

  // Read and write the contents of a map object from/to AipsIO.
  // It is done in the same way as the old SimpleOrderedMap class, so
  // persistent SimpleOrderedMap objects in CTDS can be read as std::map
  // and vice-versa.
  template<typename K, typename V>
  AipsIO& operator>> (AipsIO& ios, std::map<K,V>&);
  template<typename K, typename V>
  AipsIO& operator<< (AipsIO& ios, const std::map<K,V>&);
  // </group>
                      
} //# NAMESPACE CASACORE - END

#ifndef CASACORE_NO_AUTO_TEMPLATES
#include <casacore/casa/BasicSL/STLIO.tcc>
#endif //# CASACORE_NO_AUTO_TEMPLATES
#endif