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 // <locale>
11 
12 // template <> class codecvt<char32_t, char, mbstate_t>
13 
14 // explicit codecvt(size_t refs = 0);
15 
16 #include <locale>
17 #include <cassert>
18 
19 //#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
20 
21 typedef std::codecvt<char32_t, char, std::mbstate_t> F;
22 
23 class my_facet
24     : public F
25 {
26 public:
27     static int count;
28 
my_facet(std::size_t refs=0)29     explicit my_facet(std::size_t refs = 0)
30         : F(refs) {++count;}
31 
~my_facet()32     ~my_facet() {--count;}
33 };
34 
35 int my_facet::count = 0;
36 
37 //#endif
38 
main()39 int main()
40 {
41 //#ifndef _LIBCPP_HAS_NO_UNICODE_CHARS
42     {
43         std::locale l(std::locale::classic(), new my_facet);
44         assert(my_facet::count == 1);
45     }
46     assert(my_facet::count == 0);
47     {
48         my_facet f(1);
49         assert(my_facet::count == 1);
50         {
51             std::locale l(std::locale::classic(), &f);
52             assert(my_facet::count == 1);
53         }
54         assert(my_facet::count == 1);
55     }
56     assert(my_facet::count == 0);
57 //#endif
58 }
59