libcxx/test/std/containers/associative/map/map.access/index_rv_key.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 // <map>
  12
  13 // class map
  14
  15 // mapped_type& operator[](key_type&& k);
  16
  17 #include <map>
  18 #include <cassert>
  19
  20 #include "test_macros.h"
  21 #include "count_new.h"
  22 #include "MoveOnly.h"
  23 #include "min_allocator.h"
  24 #include "container_test_types.h"
  25
  26 int main(int, char**)
  27 {
  28     {
  29     std::map<MoveOnly, double> m;
  30     assert(m.size() == 0);
  31     assert(m[1] == 0.0);
  32     assert(m.size() == 1);
  33     m[1] = -1.5;
  34     assert(m[1] == -1.5);
  35     assert(m.size() == 1);
  36     assert(m[6] == 0);
  37     assert(m.size() == 2);
  38     m[6] = 6.5;
  39     assert(m[6] == 6.5);
  40     assert(m.size() == 2);
  41     }
  42     {
  43     typedef std::pair<const MoveOnly, double> V;
  44     std::map<MoveOnly, double, std::less<MoveOnly>, min_allocator<V>> m;
  45     assert(m.size() == 0);
  46     assert(m[1] == 0.0);
  47     assert(m.size() == 1);
  48     m[1] = -1.5;
  49     assert(m[1] == -1.5);
  50     assert(m.size() == 1);
  51     assert(m[6] == 0);
  52     assert(m.size() == 2);
  53     m[6] = 6.5;
  54     assert(m[6] == 6.5);
  55     assert(m.size() == 2);
  56     }
  57     {
  58         // Use "container_test_types.h" to check what arguments get passed
  59         // to the allocator for operator[]
  60         using Container = TCT::map<>;
  61         using Key = Container::key_type;
  62         using MappedType = Container::mapped_type;
  63         ConstructController* cc = getConstructController();
  64         cc->reset();
  65         {
  66             Container c;
  67             Key k(1);
  68             cc->expect<std::piecewise_construct_t const&, std::tuple<Key &&>&&, std::tuple<>&&>();
  69             MappedType& mref = c[std::move(k)];
  70             assert(!cc->unchecked());
  71             {
  72                 Key k2(1);
  73                 DisableAllocationGuard g;
  74                 MappedType& mref2 = c[std::move(k2)];
  75                 assert(&mref == &mref2);
  76             }
  77         }
  78     }
  79
  80   return 0;
  81 }