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      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 ostream_iterator
     15 //     : public iterator<output_iterator_tag, void, void, void, void>
     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 
     26 #include "test_macros.h"
     27 
     28 int main()
     29 {
     30     typedef std::ostream_iterator<double> I1;
     31 #if TEST_STD_VER <= 14
     32     static_assert((std::is_convertible<I1,
     33         std::iterator<std::output_iterator_tag, void, void, void, void> >::value), "");
     34 #else
     35     static_assert((std::is_same<I1::iterator_category, std::output_iterator_tag>::value), "");
     36     static_assert((std::is_same<I1::value_type, void>::value), "");
     37     static_assert((std::is_same<I1::difference_type, void>::value), "");
     38     static_assert((std::is_same<I1::pointer, void>::value), "");
     39     static_assert((std::is_same<I1::reference, void>::value), "");
     40 #endif
     41     static_assert((std::is_same<I1::char_type, char>::value), "");
     42     static_assert((std::is_same<I1::traits_type, std::char_traits<char> >::value), "");
     43     static_assert((std::is_same<I1::ostream_type, std::ostream>::value), "");
     44     typedef std::ostream_iterator<unsigned, wchar_t> I2;
     45 #if TEST_STD_VER <= 14
     46     static_assert((std::is_convertible<I2,
     47         std::iterator<std::output_iterator_tag, void, void, void, void> >::value), "");
     48 #else
     49     static_assert((std::is_same<I2::iterator_category, std::output_iterator_tag>::value), "");
     50     static_assert((std::is_same<I2::value_type, void>::value), "");
     51     static_assert((std::is_same<I2::difference_type, void>::value), "");
     52     static_assert((std::is_same<I2::pointer, void>::value), "");
     53     static_assert((std::is_same<I2::reference, void>::value), "");
     54 #endif
     55     static_assert((std::is_same<I2::char_type, wchar_t>::value), "");
     56     static_assert((std::is_same<I2::traits_type, std::char_traits<wchar_t> >::value), "");
     57     static_assert((std::is_same<I2::ostream_type, std::wostream>::value), "");
     58 }
     59