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... UTypes>
14// tuple(allocator_arg_t, const Alloc& a, tuple<UTypes...>&&);
15
16// UNSUPPORTED: c++03
17
18#include <tuple>
19#include <string>
20#include <memory>
21#include <cassert>
22
23#include "test_macros.h"
24#include "allocators.h"
25#include "test_allocator.h"
26#include "../alloc_first.h"
27#include "../alloc_last.h"
28
29struct B
30{
31 int id_;
32
33 explicit B(int i) : id_(i) {}
34
35 virtual ~B() {}
36};
37
38struct D
39 : B
40{
41 explicit D(int i) : B(i) {}
42};
43
44struct Explicit {
45 int value;
46 explicit Explicit(int x) : value(x) {}
47};
48
49struct Implicit {
50 int value;
51 Implicit(int x) : value(x) {}
52};
53
54#if TEST_STD_VER > 17
55constexpr bool alloc_move_constructor_is_constexpr() {
56 std::tuple<int> t1 = 1;
57 std::tuple<int> t2 = {std::allocator_arg, test_allocator<int>{}, std::move(t1)};
58 assert(std::get<0>(t2) == 1);
59 return true;
60}
61#endif
62
63int main(int, char**)
64{
65 {
66 typedef std::tuple<int> T0;
67 typedef std::tuple<alloc_first> T1;
68 T0 t0(2);
69 alloc_first::allocator_constructed = false;
70 T1 t1(std::allocator_arg, A1<int>(5), std::move(t0));
71 assert(alloc_first::allocator_constructed);
72 assert(std::get<0>(t1) == 2);
73 }
74 {
75 typedef std::tuple<std::unique_ptr<D>> T0;
76 typedef std::tuple<std::unique_ptr<B>> T1;
77 T0 t0(std::unique_ptr<D>(new D(3)));
78 T1 t1(std::allocator_arg, A1<int>(5), std::move(t0));
79 assert(std::get<0>(t1)->id_ == 3);
80 }
81 {
82 typedef std::tuple<int, std::unique_ptr<D>> T0;
83 typedef std::tuple<alloc_first, std::unique_ptr<B>> T1;
84 T0 t0(2, std::unique_ptr<D>(new D(3)));
85 alloc_first::allocator_constructed = false;
86 T1 t1(std::allocator_arg, A1<int>(5), std::move(t0));
87 assert(alloc_first::allocator_constructed);
88 assert(std::get<0>(t1) == 2);
89 assert(std::get<1>(t1)->id_ == 3);
90 }
91 {
92 typedef std::tuple<int, int, std::unique_ptr<D>> T0;
93 typedef std::tuple<alloc_last, alloc_first, std::unique_ptr<B>> T1;
94 T0 t0(1, 2, std::unique_ptr<D>(new D(3)));
95 alloc_first::allocator_constructed = false;
96 alloc_last::allocator_constructed = false;
97 T1 t1(std::allocator_arg, A1<int>(5), std::move(t0));
98 assert(alloc_first::allocator_constructed);
99 assert(alloc_last::allocator_constructed);
100 assert(std::get<0>(t1) == 1);
101 assert(std::get<1>(t1) == 2);
102 assert(std::get<2>(t1)->id_ == 3);
103 }
104 {
105 std::tuple<int> t1(42);
106 std::tuple<Explicit> t2{std::allocator_arg, std::allocator<int>{}, std::move(t1)};
107 assert(std::get<0>(t2).value == 42);
108 }
109 {
110 std::tuple<int> t1(42);
111 std::tuple<Implicit> t2 = {std::allocator_arg, std::allocator<int>{}, std::move(t1)};
112 assert(std::get<0>(t2).value == 42);
113 }
114 {
115 // Test that we can use a tag derived from allocator_arg_t
116 struct DerivedFromAllocatorArgT : std::allocator_arg_t { };
117 DerivedFromAllocatorArgT derived;
118 std::tuple<long> from(3l);
119 std::tuple<long long> t0(derived, A1<int>(), std::move(from));
120 }
121
122#if TEST_STD_VER > 17
123 static_assert(alloc_move_constructor_is_constexpr());
124#endif
125
126 return 0;
127}
128

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