1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 // <iterator>
10 
11 // istreambuf_iterator
12 //
13 // istreambuf_iterator() noexcept; // constexpr since C++11
14 //
15 // All specializations of istreambuf_iterator shall have a trivial copy constructor,
16 //    a constexpr default constructor and a trivial destructor.
17 
18 #include <iterator>
19 #include <sstream>
20 #include <cassert>
21 
22 #include "test_macros.h"
23 
main(int,char **)24 int main(int, char**) {
25   {
26     typedef std::istreambuf_iterator<char> T;
27     T it;
28     assert(it == T());
29 #if TEST_STD_VER >= 11
30     constexpr T it2;
31     (void)it2;
32 #endif
33 
34     ASSERT_NOEXCEPT(T());
35   }
36 
37 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
38   {
39     typedef std::istreambuf_iterator<wchar_t> T;
40     T it;
41     assert(it == T());
42 #if TEST_STD_VER >= 11
43     constexpr T it2;
44     (void)it2;
45 #endif
46 
47     ASSERT_NOEXCEPT(T());
48   }
49 #endif // TEST_HAS_NO_WIDE_CHARACTERS
50 
51   return 0;
52 }
53