boost/libs/iterator/example/func_output_iter_example.cpp

   1 // (C) Copyright Jeremy Siek 2001-2004.
   2 // Distributed under the Boost Software License, Version 1.0. (See
   3 // accompanying file LICENSE_1_0.txt or copy at
   4 // http://www.boost.org/LICENSE_1_0.txt)
   5
   6 // Revision History:
   7
   8 // 27 Feb 2001   Jeremy Siek
   9 //      Initial checkin.
  10
  11 #include <iostream>
  12 #include <string>
  13 #include <vector>
  14
  15 #include <boost/function_output_iterator.hpp>
  16
  17 struct string_appender
  18 {
  19     string_appender(std::string& s)
  20         : m_str(&s)
  21     {}
  22
  23     void operator()(const std::string& x) const
  24     {
  25         *m_str += x;
  26     }
  27
  28     std::string* m_str;
  29 };
  30
  31 int main(int, char*[])
  32 {
  33   std::vector<std::string> x;
  34   x.push_back("hello");
  35   x.push_back(" ");
  36   x.push_back("world");
  37   x.push_back("!");
  38
  39   std::string s = "";
  40   std::copy(x.begin(), x.end(),
  41             boost::make_function_output_iterator(string_appender(s)));
  42
  43   std::cout << s << std::endl;
  44
  45   return 0;
  46 }