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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 // int_type pbackfail(int_type c = traits::eof());
16 
17 #include <streambuf>
18 #include <cassert>
19 
20 int pbackfail_called = 0;
21 
22 struct test
23     : public std::basic_streambuf<char>
24 {
testtest25     test() {}
26 };
27 
main()28 int main()
29 {
30     test t;
31     assert(t.sputbackc('A') == -1);
32 }
33