test/input.output/iostream.format/std.manip/resetiosflags.pass.cpp

//===----------------------------------------------------------------------===//
//
//                     The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//

// <iomanip>

// T1 resetiosflags(ios_base::fmtflags mask);

#include <iomanip>
#include <cassert>

template <class CharT>
struct testbuf
    : public std::basic_streambuf<CharT>
{
    testbuf() {}
};

int main()
{
    {
        testbuf<char> sb;
        std::istream is(&sb);
        assert(is.flags() & std::ios_base::skipws);
        is >> std::resetiosflags(std::ios_base::skipws);
        assert(!(is.flags() & std::ios_base::skipws));
    }
    {
        testbuf<char> sb;
        std::ostream os(&sb);
        assert(os.flags() & std::ios_base::skipws);
        os << std::resetiosflags(std::ios_base::skipws);
        assert(!(os.flags() & std::ios_base::skipws));
    }
    {
        testbuf<wchar_t> sb;
        std::wistream is(&sb);
        assert(is.flags() & std::ios_base::skipws);
        is >> std::resetiosflags(std::ios_base::skipws);
        assert(!(is.flags() & std::ios_base::skipws));
    }
    {
        testbuf<wchar_t> sb;
        std::wostream os(&sb);
        assert(os.flags() & std::ios_base::skipws);
        os << std::resetiosflags(std::ios_base::skipws);
        assert(!(os.flags() & std::ios_base::skipws));
    }
}