//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <ios>
// class ios_base
// ios_base& uppercase(ios_base& str);
#include <ios>
#include <streambuf>
#include <cassert>
#include "test_macros.h"
struct testbuf : public std::streambuf {};
int main(int, char**)
{
testbuf sb;
std::ios ios(&sb);
std::ios_base& r = std::uppercase(ios);
assert(&r == &ios);
assert(ios.flags() & std::ios::uppercase);
return 0;
}