Arthur O'Dwyer a8d1182f66 [libc++] Remove some _LIBCPP_CXX03_LANG from iostreams headers.
With the STL containers, I didn't enable move operations in C++03 mode
because that would change the overload resolution for things that today
are copy operations. With iostreams, though, the copy operations aren't
present at all, and so I see no problem with enabling move operations
even in (Clang's greatly extended) C++03 mode.

Clang's C++03 mode does not support delegating constructors.

Differential Revision: https://reviews.llvm.org/D104310
2021-06-28 12:55:26 -04:00

48 lines
1.3 KiB
C++

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
// <sstream>
// template <class charT, class traits = char_traits<charT>, class Allocator = allocator<charT> >
// class basic_ostringstream
// basic_ostringstream& operator=(basic_ostringstream&& rhs);
#include <sstream>
#include <cassert>
#include "test_macros.h"
int main(int, char**)
{
{
std::ostringstream ss0(" 123 456");
std::ostringstream ss;
ss = std::move(ss0);
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == " 123 456");
int i = 234;
ss << i << ' ' << 567;
assert(ss.str() == "234 5676");
}
{
std::wostringstream ss0(L" 123 456");
std::wostringstream ss;
ss = std::move(ss0);
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == L" 123 456");
int i = 234;
ss << i << ' ' << 567;
assert(ss.str() == L"234 5676");
}
return 0;
}