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// int_type uflow();
15
16#include <streambuf>
17#include <cassert>
18
19#include "test_macros.h"
20
21int underflow_called = 0;
22
23struct test
24 : public std::basic_streambuf<char>
25{
26 test() {}
27
28};
29
30int main(int, char**)
31{
32 test t;
33 assert(t.sgetc() == -1);
34
35 return 0;
36}
37

source code of libcxx/test/std/input.output/stream.buffers/streambuf/streambuf.virtuals/streambuf.virt.get/uflow.pass.cpp