libcxx/test/std/containers/associative/set/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++03
  10
  11 // <set>
  12
  13 // class set
  14
  15 // template <class... Args>
  16 //   iterator emplace_hint(const_iterator position, Args&&... args);
  17
  18 #include <set>
  19 #include <cassert>
  20
  21 #include "test_macros.h"
  22 #include "../../Emplaceable.h"
  23 #include "DefaultOnly.h"
  24 #include "min_allocator.h"
  25
  26 int main(int, char**)
  27 {
  28     {
  29         typedef std::set<DefaultOnly> M;
  30         typedef M::iterator R;
  31         M m;
  32         assert(DefaultOnly::count == 0);
  33         R r = m.emplace_hint(m.cend());
  34         assert(r == m.begin());
  35         assert(m.size() == 1);
  36         assert(*m.begin() == DefaultOnly());
  37         assert(DefaultOnly::count == 1);
  38
  39         r = m.emplace_hint(m.cbegin());
  40         assert(r == m.begin());
  41         assert(m.size() == 1);
  42         assert(*m.begin() == DefaultOnly());
  43         assert(DefaultOnly::count == 1);
  44     }
  45     assert(DefaultOnly::count == 0);
  46     {
  47         typedef std::set<Emplaceable> M;
  48         typedef M::iterator R;
  49         M m;
  50         R r = m.emplace_hint(m.cend());
  51         assert(r == m.begin());
  52         assert(m.size() == 1);
  53         assert(*m.begin() == Emplaceable());
  54         r = m.emplace_hint(m.cend(), 2, 3.5);
  55         assert(r == std::next(m.begin()));
  56         assert(m.size() == 2);
  57         assert(*r == Emplaceable(2, 3.5));
  58         r = m.emplace_hint(m.cbegin(), 2, 3.5);
  59         assert(r == std::next(m.begin()));
  60         assert(m.size() == 2);
  61         assert(*r == Emplaceable(2, 3.5));
  62     }
  63     {
  64         typedef std::set<int> M;
  65         typedef M::iterator R;
  66         M m;
  67         R r = m.emplace_hint(m.cend(), M::value_type(2));
  68         assert(r == m.begin());
  69         assert(m.size() == 1);
  70         assert(*r == 2);
  71     }
  72     {
  73         typedef std::set<int, std::less<int>, min_allocator<int>> M;
  74         typedef M::iterator R;
  75         M m;
  76         R r = m.emplace_hint(m.cend(), M::value_type(2));
  77         assert(r == m.begin());
  78         assert(m.size() == 1);
  79         assert(*r == 2);
  80     }
  81
  82   return 0;
  83 }