ceph/src/boost/libs/locale/examples/conversions.cpp

   1 //
   2 //  Copyright (c) 2009-2011 Artyom Beilis (Tonkikh)
   3 //
   4 //  Distributed under the Boost Software License, Version 1.0. (See
   5 //  accompanying file LICENSE_1_0.txt or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 #include <boost/locale.hpp>
   9 #include <boost/algorithm/string/case_conv.hpp>
  10 #include <iostream>
  11
  12 #include <ctime>
  13
  14
  15
  16 int main()
  17 {
  18     using namespace boost::locale;
  19     using namespace std;
  20     // Create system default locale
  21     generator gen;
  22     locale loc=gen("");
  23     locale::global(loc);
  24     cout.imbue(loc);
  25
  26
  27     cout<<"Correct case conversion can't be done by simple, character by character conversion"<<endl;
  28     cout<<"because case conversion is context sensitive and not 1-to-1 conversion"<<endl;
  29     cout<<"For example:"<<endl;
  30     cout<<"   German grüßen correctly converted to "<<to_upper("grüßen")<<", instead of incorrect "
  31                     <<boost::to_upper_copy(std::string("grüßen"))<<endl;
  32     cout<<"     where ß is replaced with SS"<<endl;
  33     cout<<"   Greek ὈΔΥΣΣΕΎΣ is correctly converted to "<<to_lower("ὈΔΥΣΣΕΎΣ")<<", instead of incorrect "
  34                     <<boost::to_lower_copy(std::string("ὈΔΥΣΣΕΎΣ"))<<endl;
  35     cout<<"     where Σ is converted to σ or to ς, according to position in the word"<<endl;
  36     cout<<"Such type of conversion just can't be done using std::toupper that work on character base, also std::toupper is "<<endl;
  37     cout<<"not even applicable when working with variable character length like in UTF-8 or UTF-16 limiting the correct "<<endl;
  38     cout<<"behavior to unicode subset BMP or ASCII only"<<endl;
  39
  40 }
  41
  42 // vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
  43
  44 // boostinspect:noascii