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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <ostream>
// template <class charT, class traits = char_traits<charT> >
// class basic_ostream;
// template <class charT, class traits, class T>
// basic_ostream<charT, traits>&
// operator<<(basic_ostream<charT, traits>&& os, const T& x);
#include <ostream>
#include <cassert>
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
template <class CharT>
class testbuf
: public std::basic_streambuf<CharT>
{
typedef std::basic_streambuf<CharT> base;
std::basic_string<CharT> str_;
public:
testbuf()
{
}
std::basic_string<CharT> str() const
{return std::basic_string<CharT>(base::pbase(), base::pptr());}
protected:
virtual typename base::int_type
overflow(typename base::int_type __c = base::traits_type::eof())
{
if (__c != base::traits_type::eof())
{
int n = str_.size();
str_.push_back(__c);
str_.resize(str_.capacity());
base::setp(const_cast<CharT*>(str_.data()),
const_cast<CharT*>(str_.data() + str_.size()));
base::pbump(n+1);
}
return __c;
}
};
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
int main()
{
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
{
testbuf<char> sb;
std::ostream(&sb) << "testing...";
assert(sb.str() == "testing...");
}
{
testbuf<wchar_t> sb;
std::wostream(&sb) << L"123";
assert(sb.str() == L"123");
}
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
}
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