ceph/src/boost/libs/iterator/doc/function_output_iterator_eg.rst

   1 .. Copyright David Abrahams 2006. Distributed under the Boost
   2 .. Software License, Version 1.0. (See accompanying
   3 .. file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   4
   5 Example
   6 .......
   7
   8 ::
   9
  10     struct string_appender
  11     {
  12         string_appender(std::string& s)
  13             : m_str(&s)
  14         {}
  15
  16         void operator()(const std::string& x) const
  17         {
  18             *m_str += x;
  19         }
  20
  21         std::string* m_str;
  22     };
  23
  24     int main(int, char*[])
  25     {
  26       std::vector<std::string> x;
  27       x.push_back("hello");
  28       x.push_back(" ");
  29       x.push_back("world");
  30       x.push_back("!");
  31
  32       std::string s = "";
  33       std::copy(x.begin(), x.end(),
  34                 boost::make_function_output_iterator(string_appender(s)));
  35
  36       std::cout << s << std::endl;
  37
  38       return 0;
  39     }