test/std/containers/associative/set/set.cons/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 // <set>
  11
  12 // set& operator=(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 <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 int main()
  38 {
  39     {
  40         typedef std::set<MoveOnly> C;
  41         static_assert(std::is_nothrow_move_assignable<C>::value, "");
  42     }
  43     {
  44         typedef std::set<MoveOnly, std::less<MoveOnly>, test_allocator<MoveOnly>> C;
  45         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  46     }
  47     {
  48         typedef std::set<MoveOnly, std::less<MoveOnly>, other_allocator<MoveOnly>> C;
  49         LIBCPP_STATIC_ASSERT(std::is_nothrow_move_assignable<C>::value, "");
  50     }
  51     {
  52         typedef std::set<MoveOnly, some_comp<MoveOnly>> C;
  53         static_assert(!std::is_nothrow_move_assignable<C>::value, "");
  54     }
  55 }