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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 // insert_iterator
     13 
     14 // requires CopyConstructible<Cont::value_type>
     15 //   insert_iterator<Cont>&
     16 //   operator=(const Cont::value_type& value);
     17 
     18 #include <iterator>
     19 #include <vector>
     20 #include <cassert>
     21 #include "nasty_containers.hpp"
     22 
     23 template <class C>
     24 void
     25 test(C c1, typename C::difference_type j,
     26      typename C::value_type x1, typename C::value_type x2,
     27      typename C::value_type x3, const C& c2)
     28 {
     29     std::insert_iterator<C> q(c1, c1.begin() + j);
     30     q = x1;
     31     q = x2;
     32     q = x3;
     33     assert(c1 == c2);
     34 }
     35 
     36 template <class C>
     37 void
     38 insert3at(C& c, typename C::iterator i,
     39      typename C::value_type x1, typename C::value_type x2,
     40      typename C::value_type x3)
     41 {
     42     i = c.insert(i, x1);
     43     i = c.insert(++i, x2);
     44     c.insert(++i, x3);
     45 }
     46 
     47 int main()
     48 {
     49     {
     50     typedef std::vector<int> C;
     51     C c1;
     52     for (int i = 0; i < 3; ++i)
     53         c1.push_back(i);
     54     C c2 = c1;
     55     insert3at(c2, c2.begin(), 'a', 'b', 'c');
     56     test(c1, 0, 'a', 'b', 'c', c2);
     57     c2 = c1;
     58     insert3at(c2, c2.begin()+1, 'a', 'b', 'c');
     59     test(c1, 1, 'a', 'b', 'c', c2);
     60     c2 = c1;
     61     insert3at(c2, c2.begin()+2, 'a', 'b', 'c');
     62     test(c1, 2, 'a', 'b', 'c', c2);
     63     c2 = c1;
     64     insert3at(c2, c2.begin()+3, 'a', 'b', 'c');
     65     test(c1, 3, 'a', 'b', 'c', c2);
     66     }
     67     {
     68     typedef nasty_vector<int> C;
     69     C c1;
     70     for (int i = 0; i < 3; ++i)
     71         c1.push_back(i);
     72     C c2 = c1;
     73     insert3at(c2, c2.begin(), 'a', 'b', 'c');
     74     test(c1, 0, 'a', 'b', 'c', c2);
     75     c2 = c1;
     76     insert3at(c2, c2.begin()+1, 'a', 'b', 'c');
     77     test(c1, 1, 'a', 'b', 'c', c2);
     78     c2 = c1;
     79     insert3at(c2, c2.begin()+2, 'a', 'b', 'c');
     80     test(c1, 2, 'a', 'b', 'c', c2);
     81     c2 = c1;
     82     insert3at(c2, c2.begin()+3, 'a', 'b', 'c');
     83     test(c1, 3, 'a', 'b', 'c', c2);
     84     }
     85 }
     86