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<wchar_t, char, mbstate_t>
13 
14 // result unshift(stateT& state,
15 //                externT* to, externT* to_end, externT*& to_next) const;
16 
17 // This is pretty much just an "are you breathing" test
18 
19 #include <locale>
20 #include <string>
21 #include <vector>
22 #include <cassert>
23 
24 typedef std::codecvt<wchar_t, char, std::mbstate_t> F;
25 
26 int main()
27 {
28     std::locale l = std::locale::classic();
29     std::vector<F::extern_type> to(3);
30     const F& f = std::use_facet<F>(l);
31     std::mbstate_t mbs = {0};
32     F::extern_type* to_next = 0;
33     assert(f.unshift(mbs, to.data(), to.data() + to.size(), to_next) == F::ok);
34     assert(to_next == to.data());
35 }
36