46 lines · cpp
1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9// UNSUPPORTED: c++03, c++11, c++14, c++1710// UNSUPPORTED: no-localization11// UNSUPPORTED: libcpp-has-no-experimental-syncstream12 13// <syncstream>14 15// template <class charT, class traits, class Allocator>16// class basic_osyncstream;17 18// void emit();19 20#include <syncstream>21#include <sstream>22#include <cassert>23 24#include "test_macros.h"25 26template <class CharT>27void test() {28 using OS = std::basic_osyncstream<CharT>;29 using SS = std::basic_ostringstream<CharT>;30 CharT c = 'f';31 32 SS ss;33 OS out(ss);34 out << c;35 assert(ss.str().empty());36 out.emit();37 assert(ss.str()[0] == c);38}39 40int main(int, char**) {41 test<char>();42#ifndef TEST_HAS_NO_WIDE_CHARACTERS43 test<wchar_t>();44#endif45}46