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// <tuple>
10
11// template <class... Types> class tuple;
12
13// template <class Alloc, class U1, class U2>
14// tuple(allocator_arg_t, const Alloc& a, pair<U1, U2>&&);
15
16// UNSUPPORTED: c++03
17
18#include <tuple>
19#include <utility>
20#include <memory>
21#include <cassert>
22
23#include "test_macros.h"
24#include "allocators.h"
25#include "../alloc_first.h"
26#include "../alloc_last.h"
27
28struct B
29{
30 int id_;
31
32 explicit B(int i) : id_(i) {}
33
34 virtual ~B() {}
35};
36
37struct D
38 : B
39{
40 explicit D(int i) : B(i) {}
41};
42
43int main(int, char**)
44{
45 {
46 typedef std::pair<int, std::unique_ptr<D>> T0;
47 typedef std::tuple<alloc_first, std::unique_ptr<B>> T1;
48 T0 t0(2, std::unique_ptr<D>(new D(3)));
49 alloc_first::allocator_constructed = false;
50 T1 t1(std::allocator_arg, A1<int>(5), std::move(t0));
51 assert(alloc_first::allocator_constructed);
52 assert(std::get<0>(t1) == 2);
53 assert(std::get<1>(t1)->id_ == 3);
54 }
55 {
56 // Test that we can use a tag derived from allocator_arg_t
57 struct DerivedFromAllocatorArgT : std::allocator_arg_t { };
58 DerivedFromAllocatorArgT derived;
59 std::pair<int, int> from(1, 2);
60 std::tuple<int, int> t0(derived, A1<int>(), std::move(from));
61 }
62
63 return 0;
64}
65

source code of libcxx/test/std/utilities/tuple/tuple.tuple/tuple.cnstr/alloc_move_pair.pass.cpp