llvm/libcxx/test/std/localization/locale.categories/category.ctype/locale.codecvt/locale.codecvt.members/char_in.pass.cpp

//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//

// <locale>

// template <> class codecvt<char, char, mbstate_t>

// result in(stateT& state,
//           const externT* from, const externT* from_end, const externT*& from_next,
//           internT* to, internT* to_end, internT*& to_next) const;

#include <locale>
#include <string>
#include <vector>
#include <cassert>

#include "test_macros.h"

typedef std::codecvt<char, char, std::mbstate_t> F;

int main(int, char**)
{
    std::locale l = std::locale::classic();
    const std::basic_string<F::intern_type> from("some text");
    std::vector<char> to(from.size());
    const F& f = std::use_facet<F>(l);
    std::mbstate_t mbs = {};
    const char* from_next = 0;
    char* to_next = 0;
    assert(f.in(mbs, from.data(), from.data() + from.size(), from_next,
                     to.data(), to.data() + to.size(), to_next) == F::noconv);
    assert(from_next == from.data());
    assert(to_next == to.data());

  return 0;
}