test/std/containers/unord/unord.set/unord.set.cnstr/move_assign_noexcept.pass.cpp

   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 // <unordered_set>
  11
  12 // unordered_set& operator=(unordered_set&& c)
  13 //     noexcept(
  14 //          allocator_type::propagate_on_container_move_assignment::value &&
  15 //          is_nothrow_move_assignable<allocator_type>::value &&
  16 //          is_nothrow_move_assignable<key_compare>::value);
  17
  18 // This tests a conforming extension
  19
  20 // UNSUPPORTED: c++98, c++03
  21
  22 #include <unordered_set>
  23 #include <cassert>
  24
  25 #include "test_macros.h"
  26 #include "MoveOnly.h"
  27 #include "test_allocator.h"
  28
  29 template <class T>
  30 struct some_comp
  31 {
  32     typedef T value_type;
  33     some_comp& operator=(const some_comp&);
  34     bool operator()(const T&, const T&) const { return false; }
  35 };
  36
  37 template <class T>
  38 struct some_hash
  39 {
  40     typedef T value_type;
  41     some_hash();
  42     some_hash(const some_hash&);
  43     some_hash& operator=(const some_hash&);
  44 };
  45
  46 int main()
  47 {
  48     {
  49         typedef std::unordered_set<MoveOnly> C;
  50         static_assert(std::is_nothrow_move_assignable<C>::value, "");
  51     }
  52     {
  53         typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
  54                            std::equal_to<MoveOnly>, test_allocator<MoveOnly>> C;
  55         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  56     }
  57     {
  58         typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
  59                           std::equal_to<MoveOnly>, other_allocator<MoveOnly>> C;
  60         LIBCPP_STATIC_ASSERT(std::is_nothrow_move_assignable<C>::value, "");
  61     }
  62     {
  63         typedef std::unordered_set<MoveOnly, some_hash<MoveOnly>> C;
  64         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  65     }
  66     {
  67         typedef std::unordered_set<MoveOnly, std::hash<MoveOnly>,
  68                                                          some_comp<MoveOnly>> C;
  69         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  70     }
  71 }