libcxx/test/std/containers/associative/multiset/extract_iterator.pass.cpp

   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 // UNSUPPORTED: c++03, c++11, c++14
  10
  11 // <set>
  12
  13 // class multiset
  14
  15 // node_type extract(const_iterator);
  16
  17 #include <set>
  18 #include "test_macros.h"
  19 #include "min_allocator.h"
  20 #include "Counter.h"
  21
  22 template <class Container>
  23 void test(Container& c)
  24 {
  25     std::size_t sz = c.size();
  26
  27     for (auto first = c.cbegin(); first != c.cend();)
  28     {
  29         auto key_value = *first;
  30         typename Container::node_type t = c.extract(first++);
  31         --sz;
  32         assert(t.value() == key_value);
  33         assert(t.get_allocator() == c.get_allocator());
  34         assert(sz == c.size());
  35     }
  36
  37     assert(c.size() == 0);
  38 }
  39
  40 int main(int, char**)
  41 {
  42     {
  43         using set_type = std::multiset<int>;
  44         set_type m = {1, 2, 3, 4, 5, 6};
  45         test(m);
  46     }
  47
  48     {
  49         std::multiset<Counter<int>> m = {1, 2, 3, 4, 5, 6};
  50         assert(Counter_base::gConstructed == 6);
  51         test(m);
  52         assert(Counter_base::gConstructed == 0);
  53     }
  54
  55     {
  56         using min_alloc_set = std::multiset<int, std::less<int>, min_allocator<int>>;
  57         min_alloc_set m = {1, 2, 3, 4, 5, 6};
  58         test(m);
  59     }
  60
  61   return 0;
  62 }