| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <sstream> |
| |
| // template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> > |
| // class basic_stringbuf |
| |
| // explicit basic_stringbuf(ios_base::openmode which = ios_base::in | ios_base::out); // before C++20 |
| // basic_stringbuf() : basic_stringbuf(ios_base::in | ios_base::out) {} // C++20 |
| // explicit basic_stringbuf(ios_base::openmode which); // C++20 |
| |
| // XFAIL: FROZEN-CXX03-HEADERS-FIXME |
| |
| #include <sstream> |
| #include <cassert> |
| |
| #include "test_macros.h" |
| #if TEST_STD_VER >= 11 |
| #include "test_convertible.h" |
| #endif |
| |
| template<typename CharT> |
| struct testbuf |
| : std::basic_stringbuf<CharT> |
| { |
| void check() |
| { |
| // LWG2995 |
| // It is implementation-defined whether the sequence pointers (eback(), |
| // gptr(), egptr(), pbase(), pptr(), epptr()) are initialized to null |
| // pointers. |
| // This tests the libc++ specific implementation. |
| LIBCPP_ASSERT(this->eback() != nullptr); |
| LIBCPP_ASSERT(this->gptr() != nullptr); |
| LIBCPP_ASSERT(this->egptr() != nullptr); |
| LIBCPP_ASSERT(this->pbase() != nullptr); |
| LIBCPP_ASSERT(this->pptr() != nullptr); |
| LIBCPP_ASSERT(this->epptr() != nullptr); |
| assert(this->str().empty()); |
| } |
| }; |
| |
| int main(int, char**) |
| { |
| { |
| std::stringbuf buf; |
| assert(buf.str() == ""); |
| } |
| { |
| testbuf<char> buf; |
| buf.check(); |
| } |
| #ifndef TEST_HAS_NO_WIDE_CHARACTERS |
| { |
| std::wstringbuf buf; |
| assert(buf.str() == L""); |
| } |
| { |
| testbuf<wchar_t> buf; |
| buf.check(); |
| } |
| #endif |
| |
| #if TEST_STD_VER >= 11 |
| { |
| typedef std::stringbuf B; |
| static_assert(test_convertible<B>(), ""); |
| static_assert(!test_convertible<B, std::ios_base::openmode>(), ""); |
| } |
| #endif |
| |
| return 0; |
| } |