libcxx/test/std/containers/unord/unord.multiset/emplace_hint.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++98, c++03
  10
  11 // <unordered_set>
  12
  13 // template <class Value, class Hash = hash<Value>, class Pred = equal_to<Value>,
  14 //           class Alloc = allocator<Value>>
  15 // class unordered_multiset
  16
  17 // template <class... Args>
  18 //     iterator emplace_hint(const_iterator p, Args&&... args);
  19
  20
  21 #include <unordered_set>
  22 #include <cassert>
  23
  24 #include "test_macros.h"
  25 #include "../../Emplaceable.h"
  26 #include "min_allocator.h"
  27
  28 int main(int, char**)
  29 {
  30     {
  31         typedef std::unordered_multiset<Emplaceable> C;
  32         typedef C::iterator R;
  33         C c;
  34         C::const_iterator e = c.end();
  35         R r = c.emplace_hint(e);
  36         assert(c.size() == 1);
  37         assert(*r == Emplaceable());
  38
  39         r = c.emplace_hint(c.end(), Emplaceable(5, 6));
  40         assert(c.size() == 2);
  41         assert(*r == Emplaceable(5, 6));
  42
  43         r = c.emplace_hint(r, 5, 6);
  44         assert(c.size() == 3);
  45         assert(*r == Emplaceable(5, 6));
  46     }
  47     {
  48         typedef std::unordered_multiset<Emplaceable, std::hash<Emplaceable>,
  49                       std::equal_to<Emplaceable>, min_allocator<Emplaceable>> C;
  50         typedef C::iterator R;
  51         C c;
  52         C::const_iterator e = c.end();
  53         R r = c.emplace_hint(e);
  54         assert(c.size() == 1);
  55         assert(*r == Emplaceable());
  56
  57         r = c.emplace_hint(c.end(), Emplaceable(5, 6));
  58         assert(c.size() == 2);
  59         assert(*r == Emplaceable(5, 6));
  60
  61         r = c.emplace_hint(r, 5, 6);
  62         assert(c.size() == 3);
  63         assert(*r == Emplaceable(5, 6));
  64     }
  65
  66   return 0;
  67 }