rvalue.pass.cpp revision 256813f4e7915d64776a4edd5f4765d893b9f062 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <istream>
11
12// template <class charT, class traits, class T>
13//   basic_istream<charT, traits>&
14//   operator>>(basic_istream<charT, traits>&& is, T& x);
15
16#include <istream>
17#include <cassert>
18
19#ifdef _LIBCPP_MOVE
20
21template <class CharT>
22struct testbuf
23    : public std::basic_streambuf<CharT>
24{
25    typedef std::basic_string<CharT> string_type;
26    typedef std::basic_streambuf<CharT> base;
27private:
28    string_type str_;
29public:
30
31    testbuf() {}
32    testbuf(const string_type& str)
33        : str_(str)
34    {
35        base::setg(const_cast<CharT*>(str_.data()),
36                   const_cast<CharT*>(str_.data()),
37                   const_cast<CharT*>(str_.data()) + str_.size());
38    }
39
40    CharT* eback() const {return base::eback();}
41    CharT* gptr() const {return base::gptr();}
42    CharT* egptr() const {return base::egptr();}
43};
44
45#endif  // _LIBCPP_MOVE
46
47int main()
48{
49#ifdef _LIBCPP_MOVE
50    {
51        testbuf<char> sb("   123");
52        int i = 0;
53        std::istream(&sb) >> i;
54        assert(i == 123);
55    }
56    {
57        testbuf<wchar_t> sb(L"   123");
58        int i = 0;
59        std::wistream(&sb) >> i;
60        assert(i == 123);
61    }
62#endif  // _LIBCPP_MOVE
63}
64