wchar_t_unshift.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. 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
24typedef std::codecvt<wchar_t, char, std::mbstate_t> F;
25
26int 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