infix_ostream_it.h

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/*
   Copyright (c) 2012, 2023, Oracle and/or its affiliates.
 
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   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.
 
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   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, version 2.0, for more details.
 
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*/
#ifndef INFIX_OSTREAM_IT_INCLUDED
#define INFIX_OSTREAM_IT_INCLUDED
#include <iterator>
#include <ostream>
#include <string>
 
template <class T>
class infix_ostream_iterator
    : public std::iterator<std::output_iterator_tag, T> {
 public:
  explicit infix_ostream_iterator(std::ostream &s) : m_os(&s) {}
 
  infix_ostream_iterator(std::ostream &s, const char *d)
      : m_os(&s), m_delimiter(d) {}
 
  infix_ostream_iterator<T> &operator=(T const &item) {
    *m_os << m_curr_delimiter << item;
    m_curr_delimiter = m_delimiter;
    return *this;
  }
 
  infix_ostream_iterator<T> &operator*() { return *this; }
 
  infix_ostream_iterator<T> &operator++() { return *this; }
 
  infix_ostream_iterator<T> &operator++(int) { return *this; }
 
 private:
  std::ostream *m_os;
  std::string m_curr_delimiter;
  std::string m_delimiter;
};
 
#endif