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      1 //===----------------------------------------------------------------------===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is dual licensed under the MIT and the University of Illinois Open
      6 // Source Licenses. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 // <ios>
     11 
     12 // template <class charT, class traits> class basic_ios
     13 
     14 // locale imbue(const locale& loc);
     15 
     16 #include <ios>
     17 #include <streambuf>
     18 #include <cassert>
     19 
     20 #include "platform_support.h" // locale name macros
     21 
     22 struct testbuf
     23     : public std::streambuf
     24 {
     25 };
     26 
     27 bool f1_called = false;
     28 bool f2_called = false;
     29 bool f3_called = false;
     30 
     31 void f1(std::ios_base::event ev, std::ios_base& stream, int index)
     32 {
     33     if (ev == std::ios_base::imbue_event)
     34     {
     35         assert(!f1_called);
     36         assert( f2_called);
     37         assert( f3_called);
     38         assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
     39         assert(index == 4);
     40         f1_called = true;
     41     }
     42 }
     43 
     44 void f2(std::ios_base::event ev, std::ios_base& stream, int index)
     45 {
     46     if (ev == std::ios_base::imbue_event)
     47     {
     48         assert(!f1_called);
     49         assert(!f2_called);
     50         assert( f3_called);
     51         assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
     52         assert(index == 5);
     53         f2_called = true;
     54     }
     55 }
     56 
     57 void f3(std::ios_base::event ev, std::ios_base& stream, int index)
     58 {
     59     if (ev == std::ios_base::imbue_event)
     60     {
     61         assert(!f1_called);
     62         assert(!f2_called);
     63         assert(!f3_called);
     64         assert(stream.getloc().name() == LOCALE_en_US_UTF_8);
     65         assert(index == 6);
     66         f3_called = true;
     67     }
     68 }
     69 
     70 int main()
     71 {
     72     {
     73         std::ios ios(0);
     74         ios.register_callback(f1, 4);
     75         ios.register_callback(f2, 5);
     76         ios.register_callback(f3, 6);
     77         std::locale l = ios.imbue(std::locale(LOCALE_en_US_UTF_8));
     78         assert(l.name() == std::string("C"));
     79         assert(ios.getloc().name() == std::string(LOCALE_en_US_UTF_8));
     80         assert(f1_called);
     81         assert(f2_called);
     82         assert(f3_called);
     83     }
     84     f1_called = false;
     85     f2_called = false;
     86     f3_called = false;
     87     {
     88         testbuf sb;
     89         std::ios ios(&sb);
     90         ios.register_callback(f1, 4);
     91         ios.register_callback(f2, 5);
     92         ios.register_callback(f3, 6);
     93         std::locale l = ios.imbue(std::locale(LOCALE_en_US_UTF_8));
     94         assert(l.name() == std::string("C"));
     95         assert(ios.getloc().name() == std::string(LOCALE_en_US_UTF_8));
     96         assert(sb.getloc().name() == std::string(LOCALE_en_US_UTF_8));
     97         assert(f1_called);
     98         assert(f2_called);
     99         assert(f3_called);
    100     }
    101 }
    102