libstdc++-v3/testsuite/23_containers/unordered_multiset/55043.cc

   1 // { dg-options "-std=gnu++0x" }
   2 // { dg-do compile }
   3
   4 // Copyright (C) 2013 Free Software Foundation, Inc.
   5 //
   6 // This file is part of the GNU ISO C++ Library.  This library is free
   7 // software; you can redistribute it and/or modify it under the
   8 // terms of the GNU General Public License as published by the
   9 // Free Software Foundation; either version 3, or (at your option)
  10 // any later version.
  11
  12 // This library is distributed in the hope that it will be useful,
  13 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 // GNU General Public License for more details.
  16
  17 // You should have received a copy of the GNU General Public License along
  18 // with this library; see the file COPYING3.  If not see
  19 // <http://www.gnu.org/licenses/>.
  20
  21 // libstdc++/55043
  22
  23 #include <unordered_set>
  24 #include <vector>
  25
  26 struct MoveOnly
  27 {
  28   MoveOnly() = default;
  29   MoveOnly(MoveOnly&&) = default;
  30 };
  31
  32 struct equal {
  33   bool operator()(const MoveOnly&, const MoveOnly) const { return true; }
  34 };
  35 struct hash {
  36   std::size_t operator()(const MoveOnly&) const { return 0; }
  37 };
  38
  39 template<typename Alloc>
  40   using test_type = std::unordered_multiset<MoveOnly, hash, equal, Alloc>;
  41
  42 void test01()
  43 {
  44   typedef test_type<std::allocator<MoveOnly>> uim;
  45   std::vector<uim> v;
  46   v.emplace_back(uim());
  47 }
  48
  49 // Unordered containers don't use allocator_traits yet so need full
  50 // Allocator interface, derive from std::allocator to get it.
  51 template<typename T, bool R>
  52 struct Alloc : std::allocator<T>
  53 {
  54   template<typename U>
  55     struct rebind { typedef Alloc<U, R> other; };
  56
  57   Alloc() = default;
  58
  59   template<typename U>
  60     Alloc(const Alloc<U, R>&) { }
  61
  62   typedef typename std::conditional<R, T&&, const T&>::type arg_type;
  63
  64   void construct(T* p, arg_type) const
  65   { new((void*)p) T(); }
  66 };
  67
  68 // verify is_copy_constructible depends on allocator
  69 typedef test_type<Alloc<MoveOnly, true>> uim_rval;
  70 static_assert(!std::is_copy_constructible<uim_rval>::value, "is not copyable");
  71
  72 typedef test_type<Alloc<MoveOnly, false>> uim_lval;
  73 static_assert(std::is_copy_constructible<uim_lval>::value, "is copyable");