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//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// <locale>
// template <> class codecvt<char32_t, char, mbstate_t>
// result unshift(stateT& state,
// externT* to, externT* to_end, externT*& to_next) const;
#include <locale>
#include <string>
#include <vector>
#include <cassert>
typedef std::codecvt<char32_t, char, std::mbstate_t> F;
int main()
{
std::locale l = std::locale::classic();
std::vector<char> to(3);
const F& f = std::use_facet<F>(l);
std::mbstate_t mbs = {};
char* to_next = 0;
assert(f.unshift(mbs, to.data(), to.data() + to.size(), to_next) == F::noconv);
assert(to_next == to.data());
}
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