105 lines
3.0 KiB
C++
105 lines
3.0 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++03
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// UNSUPPORTED: no-localization
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// <filesystem>
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// class path
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// template <class charT, class traits>
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// basic_ostream<charT, traits>&
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// operator<<(basic_ostream<charT, traits>& os, const path& p);
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//
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// template <class charT, class traits>
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// basic_istream<charT, traits>&
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// operator>>(basic_istream<charT, traits>& is, path& p)
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//
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#include "filesystem_include.h"
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#include <type_traits>
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#include <sstream>
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#include <cassert>
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#include <iostream>
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#include "test_macros.h"
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#include "test_iterators.h"
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#include "count_new.h"
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#include "filesystem_test_helper.h"
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MultiStringType InStr = MKSTR("abcdefg/\"hijklmnop\"/qrstuvwxyz/123456789");
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MultiStringType OutStr = MKSTR("\"abcdefg/\\\"hijklmnop\\\"/qrstuvwxyz/123456789\"");
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template <class CharT>
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void doIOTest() {
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using namespace fs;
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using Ptr = const CharT*;
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using StrStream = std::basic_stringstream<CharT>;
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const Ptr E = OutStr;
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const path p((const char*)InStr);
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StrStream ss;
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{ // test output
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auto& ret = (ss << p);
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assert(ss.str() == E);
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assert(&ret == &ss);
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}
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{ // test input
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path p_in;
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auto& ret = ss >> p_in;
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assert(p_in.native() == (const path::value_type*)InStr);
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assert(&ret == &ss);
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}
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}
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namespace impl {
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using namespace fs;
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template <class Stream, class Tp, class = decltype(std::declval<Stream&>() << std::declval<Tp&>())>
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std::true_type is_ostreamable_imp(int);
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template <class Stream, class Tp>
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std::false_type is_ostreamable_imp(long);
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template <class Stream, class Tp, class = decltype(std::declval<Stream&>() >> std::declval<Tp&>())>
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std::true_type is_istreamable_imp(int);
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template <class Stream, class Tp>
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std::false_type is_istreamable_imp(long);
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} // namespace impl
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template <class Stream, class Tp>
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struct is_ostreamable : decltype(impl::is_ostreamable_imp<Stream, Tp>(0)) {};
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template <class Stream, class Tp>
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struct is_istreamable : decltype(impl::is_istreamable_imp<Stream, Tp>(0)) {};
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void test_LWG2989() {
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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static_assert(!is_ostreamable<decltype(std::cout), std::wstring>::value, "");
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static_assert(!is_ostreamable<decltype(std::wcout), std::string>::value, "");
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static_assert(!is_istreamable<decltype(std::cin), std::wstring>::value, "");
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static_assert(!is_istreamable<decltype(std::wcin), std::string>::value, "");
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#endif
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}
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int main(int, char**) {
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doIOTest<char>();
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#ifndef TEST_HAS_NO_WIDE_CHARACTERS
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doIOTest<wchar_t>();
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#endif
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// TODO(var-const): uncomment when it becomes possible to instantiate a `basic_ostream` object with a sized character
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// type (see https://llvm.org/PR53119).
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//doIOTest<char16_t>();
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//doIOTest<char32_t>();
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test_LWG2989();
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return 0;
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}
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