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 // void gbump(int n);
15
16 #include <streambuf>
17 #include <cassert>
18
19 #include "test_macros.h"
20
21 template <class CharT>
22 struct test
23 : public std::basic_streambuf<CharT>
24 {
25 typedef std::basic_streambuf<CharT> base;
26
testtest27 test() {}
28
setgtest29 void setg(CharT* gbeg, CharT* gnext, CharT* gend)
30 {
31 base::setg(gbeg, gnext, gend);
32 }
33
gbumptest34 void gbump(int n)
35 {
36 CharT* gbeg = base::eback();
37 CharT* gnext = base::gptr();
38 CharT* gend = base::egptr();
39 base::gbump(n);
40 assert(base::eback() == gbeg);
41 assert(base::gptr() == gnext+n);
42 assert(base::egptr() == gend);
43 }
44 };
45
main(int,char **)46 int main(int, char**)
47 {
48 {
49 test<char> t;
50 char in[] = "ABCDE";
51 t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
52 t.gbump(2);
53 }
54 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
55 {
56 test<wchar_t> t;
57 wchar_t in[] = L"ABCDE";
58 t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
59 t.gbump(3);
60 }
61 #endif
62
63 return 0;
64 }
65