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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: c++98, c++03
// <filesystem>
// class path
// template <class charT, class traits>
// basic_ostream<charT, traits>&
// operator<<(basic_ostream<charT, traits>& os, const path& p);
//
// template <class charT, class traits>
// basic_istream<charT, traits>&
// operator>>(basic_istream<charT, traits>& is, path& p)
//
#include "filesystem_include.hpp"
#include <type_traits>
#include <sstream>
#include <cassert>
#include <iostream>
#include "test_macros.h"
#include "test_iterators.h"
#include "count_new.hpp"
#include "filesystem_test_helper.hpp"
MultiStringType InStr = MKSTR("abcdefg/\"hijklmnop\"/qrstuvwxyz/123456789");
MultiStringType OutStr = MKSTR("\"abcdefg/\\\"hijklmnop\\\"/qrstuvwxyz/123456789\"");
template <class CharT>
void doIOTest() {
using namespace fs;
using Ptr = const CharT*;
using StrStream = std::basic_stringstream<CharT>;
const Ptr E = OutStr;
const path p((const char*)InStr);
StrStream ss;
{ // test output
auto& ret = (ss << p);
assert(ss.str() == E);
assert(&ret == &ss);
}
{ // test input
path p_in;
auto& ret = ss >> p_in;
assert(p_in.native() == (const char*)InStr);
assert(&ret == &ss);
}
}
namespace impl {
using namespace fs;
template <class Stream, class Tp, class = decltype(std::declval<Stream&>() << std::declval<Tp&>())>
std::true_type is_ostreamable_imp(int);
template <class Stream, class Tp>
std::false_type is_ostreamable_imp(long);
template <class Stream, class Tp, class = decltype(std::declval<Stream&>() >> std::declval<Tp&>())>
std::true_type is_istreamable_imp(int);
template <class Stream, class Tp>
std::false_type is_istreamable_imp(long);
} // namespace impl
template <class Stream, class Tp>
struct is_ostreamable : decltype(impl::is_ostreamable_imp<Stream, Tp>(0)) {};
template <class Stream, class Tp>
struct is_istreamable : decltype(impl::is_istreamable_imp<Stream, Tp>(0)) {};
void test_LWG2989() {
static_assert(!is_ostreamable<decltype(std::cout), std::wstring>::value, "");
static_assert(!is_ostreamable<decltype(std::wcout), std::string>::value, "");
static_assert(!is_istreamable<decltype(std::cin), std::wstring>::value, "");
static_assert(!is_istreamable<decltype(std::wcin), std::string>::value, "");
}
int main() {
doIOTest<char>();
doIOTest<wchar_t>();
//doIOTest<char16_t>();
//doIOTest<char32_t>();
test_LWG2989();
}
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