types.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
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// <iterator>
11
12// back_insert_iterator
13
14// Test nested types and data member:
15
16// template <BackInsertionContainer Cont>
17// class back_insert_iterator {
18// protected:
19//   Cont* container;
20// public:
21//   typedef Cont                        container_type;
22//   typedef void                        value_type;
23//   typedef void                        difference_type;
24//   typedef back_insert_iterator<Cont>& reference;
25//   typedef void                        pointer;
26// };
27
28#include <iterator>
29#include <type_traits>
30#include <vector>
31
32template <class C>
33struct find_container
34    : private std::back_insert_iterator<C>
35{
36    explicit find_container(C& c) : std::back_insert_iterator<C>(c) {}
37    void test() {this->container = 0;}
38};
39
40template <class C>
41void
42test()
43{
44    typedef std::back_insert_iterator<C> R;
45    C c;
46    find_container<C> q(c);
47    q.test();
48    static_assert((std::is_same<typename R::container_type, C>::value), "");
49    static_assert((std::is_same<typename R::value_type, void>::value), "");
50    static_assert((std::is_same<typename R::difference_type, void>::value), "");
51    static_assert((std::is_same<typename R::reference, R&>::value), "");
52    static_assert((std::is_same<typename R::pointer, void>::value), "");
53    static_assert((std::is_same<typename R::iterator_category, std::output_iterator_tag>::value), "");
54}
55
56int main()
57{
58    test<std::vector<int> >();
59}
60