libstdc++-v3/testsuite/22_locale/conversions/string/3.cc

   1 // { dg-do run { target c++11 } }
   2
   3 // Copyright (C) 2015-2020 Free Software Foundation, Inc.
   4 //
   5 // This file is part of the GNU ISO C++ Library.  This library is free
   6 // software; you can redistribute it and/or modify it under the
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 3, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING3.  If not see
  18 // <http://www.gnu.org/licenses/>.
  19
  20 // 22.3.3.2.2  String conversions
  21
  22 #include <locale>
  23 #include <string>
  24 #include <testsuite_hooks.h>
  25
  26 template<typename Elem>
  27 struct cvt : std::codecvt<Elem, char, std::mbstate_t> { };
  28
  29 template<typename Elem>
  30 using str_conv = std::wstring_convert<cvt<Elem>, Elem>;
  31
  32 using std::string;
  33 using std::u16string;
  34 using std::u32string;
  35
  36 // test construction with state, for partial conversions
  37
  38 void test01()
  39 {
  40   typedef str_conv<char> wsc;
  41
  42   wsc c;
  43   string input = (const char*)u8"\u00a3 shillings pence";
  44   string woutput = c.from_bytes(input.substr(0, 1));
  45   auto partial_state = c.state();
  46   auto partial_count = c.converted();
  47
  48   auto woutput2 = c.from_bytes("state reset on next conversion");
  49   VERIFY( woutput2 == "state reset on next conversion" );
  50
  51   wsc c2(new cvt<char>, partial_state);
  52   woutput += c2.from_bytes(input.substr(partial_count));
  53   VERIFY( (const char*)u8"\u00a3 shillings pence" == woutput );
  54
  55   string roundtrip = c2.to_bytes(woutput);
  56   VERIFY( input == roundtrip );
  57 }
  58
  59 void test02()
  60 {
  61   typedef str_conv<char16_t> wsc;
  62
  63   wsc c;
  64   string input = (const char*)u8"\u00a3 shillings pence";
  65   u16string woutput = c.from_bytes(input.substr(0, 1));
  66   auto partial_state = c.state();
  67   auto partial_count = c.converted();
  68
  69   auto woutput2 = c.from_bytes("state reset on next conversion");
  70   VERIFY( woutput2 == u"state reset on next conversion" );
  71
  72   wsc c2(new cvt<char16_t>, partial_state);
  73   woutput += c2.from_bytes(input.substr(partial_count));
  74   VERIFY( u"\u00a3 shillings pence" == woutput );
  75
  76   string roundtrip = c2.to_bytes(woutput);
  77   VERIFY( input == roundtrip );
  78 }
  79
  80 void test03()
  81 {
  82   typedef str_conv<char32_t> wsc;
  83
  84   wsc c;
  85   string input = (const char*)u8"\u00a3 shillings pence";
  86   u32string woutput = c.from_bytes(input.substr(0, 1));
  87   auto partial_state = c.state();
  88   auto partial_count = c.converted();
  89
  90   auto woutput2 = c.from_bytes("state reset on next conversion");
  91   VERIFY( woutput2 == U"state reset on next conversion" );
  92
  93   wsc c2(new cvt<char32_t>, partial_state);
  94   woutput += c2.from_bytes(input.substr(partial_count));
  95   VERIFY( U"\u00a3 shillings pence" == woutput );
  96
  97   string roundtrip = c2.to_bytes(woutput);
  98   VERIFY( input == roundtrip );
  99 }
 100
 101
 102 int main()
 103 {
 104   test01();
 105   test02();
 106   test03();
 107 }