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, const pair<U1, U2>&);
15
16// UNSUPPORTED: c++03
17
18#include <tuple>
19#include <utility>
20#include <cassert>
21
22#include "test_macros.h"
23#include "allocators.h"
24#include "../alloc_first.h"
25#include "../alloc_last.h"
26
27int main(int, char**)
28{
29 {
30 typedef std::pair<long, int> T0;
31 typedef std::tuple<long long, double> T1;
32 T0 t0(2, 3);
33 T1 t1(std::allocator_arg, A1<int>(5), t0);
34 assert(std::get<0>(t1) == 2);
35 assert(std::get<1>(t1) == 3);
36 }
37 {
38 typedef std::pair<int, int> T0;
39 typedef std::tuple<alloc_first, double> T1;
40 T0 t0(2, 3);
41 alloc_first::allocator_constructed = false;
42 T1 t1(std::allocator_arg, A1<int>(5), t0);
43 assert(alloc_first::allocator_constructed);
44 assert(std::get<0>(t1) == 2);
45 assert(std::get<1>(t1) == 3);
46 }
47 {
48 typedef std::pair<int, int> T0;
49 typedef std::tuple<alloc_first, alloc_last> T1;
50 T0 t0(2, 3);
51 alloc_first::allocator_constructed = false;
52 alloc_last::allocator_constructed = false;
53 T1 t1(std::allocator_arg, A1<int>(5), t0);
54 assert(alloc_first::allocator_constructed);
55 assert(alloc_last::allocator_constructed);
56 assert(std::get<0>(t1) == 2);
57 assert(std::get<1>(t1) == 3);
58 }
59 {
60 // Test that we can use a tag derived from allocator_arg_t
61 struct DerivedFromAllocatorArgT : std::allocator_arg_t { };
62 DerivedFromAllocatorArgT derived;
63 std::pair<int, int> p(1, 2);
64 std::tuple<int, int> t(derived, A1<int>(), p);
65 }
66
67 return 0;
68}
69

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