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-exception
6//
7//===----------------------------------------------------------------------===//
8
9// <sstream>
10
11// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
12// class basic_ostringstream
13
14// void swap(basic_ostringstream& rhs);
15
16#include <sstream>
17#include <cassert>
18
19#include "test_macros.h"
20
21int main(int, char**)
22{
23 {
24 std::ostringstream ss0(" 123 456");
25 std::ostringstream ss;
26 ss.swap(rhs&: ss0);
27 assert(ss.rdbuf() != 0);
28 assert(ss.good());
29 assert(ss.str() == " 123 456");
30 int i = 234;
31 ss << i << ' ' << 567;
32 assert(ss.str() == "234 5676");
33 ss0 << i << ' ' << 567;
34 assert(ss0.str() == "234 567");
35 }
36#ifndef TEST_HAS_NO_WIDE_CHARACTERS
37 {
38 std::wostringstream ss0(L" 123 456");
39 std::wostringstream ss;
40 ss.swap(rhs&: ss0);
41 assert(ss.rdbuf() != 0);
42 assert(ss.good());
43 assert(ss.str() == L" 123 456");
44 int i = 234;
45 ss << i << ' ' << 567;
46 assert(ss.str() == L"234 5676");
47 ss0 << i << ' ' << 567;
48 assert(ss0.str() == L"234 567");
49 }
50#endif
51
52 return 0;
53}
54

source code of libcxx/test/std/input.output/string.streams/ostringstream/ostringstream.assign/member_swap.pass.cpp