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
28 struct B
29 {
30 int id_;
31
BB32 explicit B(int i) : id_(i) {}
33
~BB34 virtual ~B() {}
35 };
36
37 struct D
38 : B
39 {
DD40 explicit D(int i) : B(i) {}
41 };
42
main(int,char **)43 int 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