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// <streambuf>
10
11// template <class charT, class traits = char_traits<charT> >
12// class basic_streambuf;
13
14// streamsize sputn(const char_type* s, streamsize n);
15
16#include <streambuf>
17#include <cassert>
18
19#include "test_macros.h"
20
21int xsputn_called = 0;
22
23struct test
24 : public std::basic_streambuf<char>
25{
26 test() {}
27
28protected:
29 std::streamsize xsputn(const char_type*, std::streamsize)
30 {
31 ++xsputn_called;
32 return 5;
33 }
34};
35
36int main(int, char**)
37{
38 test t;
39 assert(xsputn_called == 0);
40 assert(t.sputn(0, 0) == 5);
41 assert(xsputn_called == 1);
42
43 return 0;
44}
45

source code of libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.members/streambuf.pub.put/sputn.pass.cpp