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 in_avail();
15
16#include <streambuf>
17#include <cassert>
18
19#include "test_macros.h"
20
21int showmanyc_called = 0;
22
23template <class CharT>
24struct test
25 : public std::basic_streambuf<CharT>
26{
27 typedef std::basic_streambuf<CharT> base;
28
29 test() {}
30
31 void setg(CharT* gbeg, CharT* gnext, CharT* gend)
32 {
33 base::setg(gbeg, gnext, gend);
34 }
35protected:
36 std::streamsize showmanyc()
37 {
38 ++showmanyc_called;
39 return 5;
40 }
41};
42
43int main(int, char**)
44{
45 {
46 test<char> t;
47 assert(t.in_avail() == 5);
48 assert(showmanyc_called == 1);
49 char in[5];
50 t.setg(gbeg: in, gnext: in+2, gend: in+5);
51 assert(t.in_avail() == 3);
52 }
53
54 return 0;
55}
56

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