test/std/localization/locale.categories/category.collate/locale.collate.byname/transform.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
//
//===----------------------------------------------------------------------===//
//
// NetBSD does not support LC_COLLATE at the moment
// XFAIL: netbsd

// <locale>

// template <class charT> class collate_byname

// string_type transform(const charT* low, const charT* high) const;

// REQUIRES: locale.en_US.UTF-8

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

#include <stdio.h>

#include "test_macros.h"
#include "platform_support.h" // locale name macros

int main(int, char**)
{
    {
        std::locale l(LOCALE_en_US_UTF_8);
        {
            std::string x("1234");
            const std::collate<char>& f = std::use_facet<std::collate<char> >(l);
            assert(f.transform(x.data(), x.data() + x.size()) != x);
        }
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
        {
            std::wstring x(L"1234");
            const std::collate<wchar_t>& f = std::use_facet<std::collate<wchar_t> >(l);
            assert(f.transform(x.data(), x.data() + x.size()) != x);
        }
#endif
    }
    {
        std::locale l("C");
        {
            std::string x("1234");
            const std::collate<char>& f = std::use_facet<std::collate<char> >(l);
            assert(f.transform(x.data(), x.data() + x.size()) == x);
        }
#ifndef TEST_HAS_NO_WIDE_CHARACTERS
        {
            std::wstring x(L"1234");
            const std::collate<wchar_t>& f = std::use_facet<std::collate<wchar_t> >(l);
            assert(f.transform(x.data(), x.data() + x.size()) == x);
        }
#endif
    }

  return 0;
}