1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // <iterator>
11
12 // template <class T, class charT = char, class traits = char_traits<charT>,
13 // class Distance = ptrdiff_t>
14 // class istream_iterator
15 // : public iterator<input_iterator_tag, T, Distance, const T*, const T&>
16 // {
17 // public:
18 // typedef charT char_type;
19 // typedef traits traits_type;
20 // typedef basic_istream<charT,traits> istream_type;
21 // ...
22
23 #include <iterator>
24 #include <type_traits>
25
main()26 int main()
27 {
28 typedef std::istream_iterator<double> I1;
29 static_assert((std::is_convertible<I1,
30 std::iterator<std::input_iterator_tag, double, std::ptrdiff_t,
31 const double*, const double&> >::value), "");
32 static_assert((std::is_same<I1::char_type, char>::value), "");
33 static_assert((std::is_same<I1::traits_type, std::char_traits<char> >::value), "");
34 static_assert((std::is_same<I1::istream_type, std::istream>::value), "");
35 typedef std::istream_iterator<unsigned, wchar_t> I2;
36 static_assert((std::is_convertible<I2,
37 std::iterator<std::input_iterator_tag, unsigned, std::ptrdiff_t,
38 const unsigned*, const unsigned&> >::value), "");
39 static_assert((std::is_same<I2::char_type, wchar_t>::value), "");
40 static_assert((std::is_same<I2::traits_type, std::char_traits<wchar_t> >::value), "");
41 static_assert((std::is_same<I2::istream_type, std::wistream>::value), "");
42 }
43