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 // <iomanip>
10 
11 // T5 setprecision(int n);
12 
13 #include <iomanip>
14 #include <istream>
15 #include <ostream>
16 #include <cassert>
17 
18 template <class CharT>
19 struct testbuf
20     : public std::basic_streambuf<CharT>
21 {
22     testbuf() {}
23 };
24 
25 int main(int, char**)
26 {
27     {
28         testbuf<char> sb;
29         std::istream is(&sb);
30         is >> std::setprecision(10);
31         assert(is.precision() == 10);
32     }
33     {
34         testbuf<char> sb;
35         std::ostream os(&sb);
36         os << std::setprecision(10);
37         assert(os.precision() == 10);
38     }
39     {
40         testbuf<wchar_t> sb;
41         std::wistream is(&sb);
42         is >> std::setprecision(10);
43         assert(is.precision() == 10);
44     }
45     {
46         testbuf<wchar_t> sb;
47         std::wostream os(&sb);
48         os << std::setprecision(10);
49         assert(os.precision() == 10);
50     }
51 
52   return 0;
53 }
54