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 // front_insert_iterator
13
14 // Test nested types and data member:
15
16 // template <class Container>
17 // class front_insert_iterator {
18 // protected:
19 // Container* container;
20 // public:
21 // typedef Container container_type;
22 // typedef void value_type;
23 // typedef void difference_type;
24 // typedef front_insert_iterator<Cont>& reference;
25 // typedef void pointer;
26 // typedef output_iterator_tag iterator_category;
27 // };
28
29 #include <iterator>
30 #include <type_traits>
31 #include <vector>
32
33 template <class C>
34 struct find_container
35 : private std::front_insert_iterator<C>
36 {
find_containerfind_container37 explicit find_container(C& c) : std::front_insert_iterator<C>(c) {}
testfind_container38 void test() {this->container = 0;}
39 };
40
41 template <class C>
42 void
test()43 test()
44 {
45 typedef std::front_insert_iterator<C> R;
46 C c;
47 find_container<C> q(c);
48 q.test();
49 static_assert((std::is_same<typename R::container_type, C>::value), "");
50 static_assert((std::is_same<typename R::value_type, void>::value), "");
51 static_assert((std::is_same<typename R::difference_type, void>::value), "");
52 static_assert((std::is_same<typename R::reference, R&>::value), "");
53 static_assert((std::is_same<typename R::pointer, void>::value), "");
54 static_assert((std::is_same<typename R::iterator_category, std::output_iterator_tag>::value), "");
55 }
56
main()57 int main()
58 {
59 test<std::vector<int> >();
60 }
61