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// FILE_DEPENDENCIES: test.dat, test2.dat
10
11// <fstream>
12
13// template <class charT, class traits = char_traits<charT> >
14// class basic_ifstream
15
16// void swap(basic_ifstream& rhs);
17
18#include <fstream>
19#include <cassert>
20
21#include "test_macros.h"
22
23int main(int, char**)
24{
25 {
26 std::ifstream fs1("test.dat");
27 std::ifstream fs2("test2.dat");
28 fs1.swap(rhs&: fs2);
29 double x = 0;
30 fs1 >> x;
31 assert(x == 4.5);
32 fs2 >> x;
33 assert(x == 3.25);
34 }
35#ifndef TEST_HAS_NO_WIDE_CHARACTERS
36 {
37 std::wifstream fs1("test.dat");
38 std::wifstream fs2("test2.dat");
39 fs1.swap(rhs&: fs2);
40 double x = 0;
41 fs1 >> x;
42 assert(x == 4.5);
43 fs2 >> x;
44 assert(x == 3.25);
45 }
46#endif
47
48 return 0;
49}
50

source code of libcxx/test/std/input.output/file.streams/fstreams/ifstream.assign/member_swap.pass.cpp