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 // back_insert_iterator
13 
14 // requires CopyConstructible<Cont::value_type>
15 //   back_insert_iterator<Cont>&
16 //   operator=(const Cont::value_type& value);
17 
18 #include <iterator>
19 #include <vector>
20 #include <cassert>
21 
22 template <class C>
23 void
test(C c)24 test(C c)
25 {
26     const typename C::value_type v = typename C::value_type();
27     std::back_insert_iterator<C> i(c);
28     i = v;
29     assert(c.back() == v);
30 }
31 
32 class Copyable
33 {
34     int data_;
35 public:
Copyable()36     Copyable() : data_(0) {}
~Copyable()37     ~Copyable() {data_ = -1;}
38 
operator ==(const Copyable & x,const Copyable & y)39     friend bool operator==(const Copyable& x, const Copyable& y)
40         {return x.data_ == y.data_;}
41 };
42 
main()43 int main()
44 {
45     test(std::vector<Copyable>());
46 }
47