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 // <ios>
10 
11 // class ios_base
12 
13 // ios_base& nouppercase(ios_base& str);
14 
15 #include <ios>
16 #include <streambuf>
17 #include <cassert>
18 
19 struct testbuf : public std::streambuf {};
20 
21 int main(int, char**)
22 {
23     testbuf sb;
24     std::ios ios(&sb);
25     std::uppercase(ios);
26     std::ios_base& r = std::nouppercase(ios);
27     assert(&r == &ios);
28     assert(!(ios.flags() & std::ios::uppercase));
29 
30   return 0;
31 }
32