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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 // <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 = {};
     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