ceph/src/boost/libs/regex/example/snippets/regex_token_iterator_eg_1.cpp

   1 /*
   2  *
   3  * Copyright (c) 12003
   4  * John Maddock
   5  *
   6  * Use, modification and distribution are subject to the
   7  * Boost Software License, Version 1.0. (See accompanying file
   8  * LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
   9  *
  10  */
  11
  12  /*
  13   *   LOCATION:    see http://www.boost.org for most recent version.
  14   *   FILE         regex_token_iterator_example_1.cpp
  15   *   VERSION      see <boost/version.hpp>
  16   *   DESCRIPTION: regex_token_iterator example: split a string into tokens.
  17   */
  18
  19
  20 #include <boost/regex.hpp>
  21
  22 #include <iostream>
  23 using namespace std;
  24
  25
  26 #if defined(BOOST_MSVC) || (defined(__BORLANDC__) && (__BORLANDC__ == 0x550))
  27 //
  28 // problem with std::getline under MSVC6sp3
  29 istream& getline(istream& is, std::string& s)
  30 {
  31    s.erase();
  32    char c = static_cast<char>(is.get());
  33    while(c != '\n')
  34    {
  35       s.append(1, c);
  36       c = static_cast<char>(is.get());
  37    }
  38    return is;
  39 }
  40 #endif
  41
  42
  43 int main(int argc, const char*[])
  44 {
  45    string s;
  46    do{
  47       if(argc == 1)
  48       {
  49          cout << "Enter text to split (or \"quit\" to exit): ";
  50          getline(cin, s);
  51          if(s == "quit") break;
  52       }
  53       else
  54          s = "This is a string of tokens";
  55
  56       boost::regex re("\\s+");
  57       boost::sregex_token_iterator i(s.begin(), s.end(), re, -1);
  58       boost::sregex_token_iterator j;
  59
  60       unsigned count = 0;
  61       while(i != j)
  62       {
  63          cout << *i++ << endl;
  64          count++;
  65       }
  66       cout << "There were " << count << " tokens found." << endl;
  67
  68    }while(argc == 1);
  69    return 0;
  70 }
  71
  72