1 //===----------------------------------------------------------------------===//
2 //
3 //                     The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 
10 // <streambuf>
11 
12 // template <class charT, class traits = char_traits<charT> >
13 // class basic_streambuf;
14 
15 // void setg(char_type* gbeg, char_type* gnext, char_type* gend);
16 
17 #include <streambuf>
18 #include <cassert>
19 
20 template <class CharT>
21 struct test
22     : public std::basic_streambuf<CharT>
23 {
24     typedef std::basic_streambuf<CharT> base;
25 
testtest26     test() {}
27 
setgtest28     void setg(CharT* gbeg, CharT* gnext, CharT* gend)
29     {
30         base::setg(gbeg, gnext, gend);
31         assert(base::eback() == gbeg);
32         assert(base::gptr() == gnext);
33         assert(base::egptr() == gend);
34     }
35 };
36 
main()37 int main()
38 {
39     {
40         test<char> t;
41         char in[] = "ABC";
42         t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
43     }
44     {
45         test<wchar_t> t;
46         wchar_t in[] = L"ABC";
47         t.setg(in, in+1, in+sizeof(in)/sizeof(in[0]));
48     }
49 }
50