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
21 int showmanyc_called = 0;
22
23 template <class CharT>
24 struct test
25 : public std::basic_streambuf<CharT>
26 {
27 typedef std::basic_streambuf<CharT> base;
28
testtest29 test() {}
30
setgtest31 void setg(CharT* gbeg, CharT* gnext, CharT* gend)
32 {
33 base::setg(gbeg, gnext, gend);
34 }
35 protected:
showmanyctest36 std::streamsize showmanyc()
37 {
38 ++showmanyc_called;
39 return 5;
40 }
41 };
42
main(int,char **)43 int 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(in, in+2, in+5);
51 assert(t.in_avail() == 3);
52 }
53
54 return 0;
55 }
56