b64f8b07c1
git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@119395 91177308-0d34-0410-b5e6-96231b3b80d8
64 lines
1.6 KiB
C++
64 lines
1.6 KiB
C++
//===----------------------------------------------------------------------===//
|
|
//
|
|
// 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.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
// <istream>
|
|
|
|
// template <class charT, class traits, class T>
|
|
// basic_istream<charT, traits>&
|
|
// operator>>(basic_istream<charT, traits>&& is, T& x);
|
|
|
|
#include <istream>
|
|
#include <cassert>
|
|
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
template <class CharT>
|
|
struct testbuf
|
|
: public std::basic_streambuf<CharT>
|
|
{
|
|
typedef std::basic_string<CharT> string_type;
|
|
typedef std::basic_streambuf<CharT> base;
|
|
private:
|
|
string_type str_;
|
|
public:
|
|
|
|
testbuf() {}
|
|
testbuf(const string_type& str)
|
|
: str_(str)
|
|
{
|
|
base::setg(const_cast<CharT*>(str_.data()),
|
|
const_cast<CharT*>(str_.data()),
|
|
const_cast<CharT*>(str_.data()) + str_.size());
|
|
}
|
|
|
|
CharT* eback() const {return base::eback();}
|
|
CharT* gptr() const {return base::gptr();}
|
|
CharT* egptr() const {return base::egptr();}
|
|
};
|
|
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
|
|
int main()
|
|
{
|
|
#ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
{
|
|
testbuf<char> sb(" 123");
|
|
int i = 0;
|
|
std::istream(&sb) >> i;
|
|
assert(i == 123);
|
|
}
|
|
{
|
|
testbuf<wchar_t> sb(L" 123");
|
|
int i = 0;
|
|
std::wistream(&sb) >> i;
|
|
assert(i == 123);
|
|
}
|
|
#endif // _LIBCPP_HAS_NO_RVALUE_REFERENCES
|
|
}
|