1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// <tuple>
// template <class... Types>
// template<class Alloc, class... UTypes>
// constexpr explicit(see below)
// tuple<Types...>::tuple(allocator_arg_t, const Alloc& a,
// const tuple<UTypes...>&&);
//
// Constraints:
// sizeof...(Types) equals sizeof...(UTypes) &&
// (is_constructible_v<Types, decltype(get<I>(FWD(u)))> && ...) is true &&
// (
// sizeof...(Types) is not 1 ||
// (
// !is_convertible_v<decltype(u), T> &&
// !is_constructible_v<T, decltype(u)> &&
// !is_same_v<T, U>
// )
// )
// UNSUPPORTED: c++03, c++11, c++14, c++17, c++20
#include <cassert>
#include <tuple>
#include "convert_types.h"
#include "test_allocator.h"
#include "test_macros.h"
// test: The expression inside explicit is equivalent to:
// !(is_convertible_v<decltype(get<I>(FWD(u))), Types> && ...)
static_assert(ImplicitlyConstructible< std::tuple<ConvertibleFrom<ConstMove>>, std::allocator_arg_t,
const test_allocator<int>&, const std::tuple<ConstMove>&&>);
static_assert(
ImplicitlyConstructible< std::tuple<ConvertibleFrom<ConstMove>, ConvertibleFrom<ConstMove>>, std::allocator_arg_t,
const test_allocator<int>&, const std::tuple<ConstMove, ConstMove>&&>);
static_assert(!ImplicitlyConstructible<std::tuple<ExplicitConstructibleFrom<ConstMove>>, std::allocator_arg_t,
const test_allocator<int>&, const std::tuple<ConstMove>&&>);
static_assert(!ImplicitlyConstructible<std::tuple<ExplicitConstructibleFrom<ConstMove>, ConvertibleFrom<ConstMove>>,
std::allocator_arg_t, const test_allocator<int>&,
const std::tuple<ConstMove, ConstMove>&&>);
constexpr bool test() {
// test implicit conversions.
// sizeof...(Types) == 1
{
const std::tuple<ConstMove> t1{1};
std::tuple<ConvertibleFrom<ConstMove>> t2 = {std::allocator_arg, test_allocator<int>{}, std::move(t1)};
assert(std::get<0>(t2).v.val == 1);
assert(std::get<0>(t2).alloc_constructed);
}
// test implicit conversions.
// sizeof...(Types) > 1
{
const std::tuple<ConstMove, int> t1{1, 2};
std::tuple<ConvertibleFrom<ConstMove>, int> t2 = {std::allocator_arg_t{}, test_allocator<int>{}, std::move(t1)};
assert(std::get<0>(t2).v.val == 1);
assert(std::get<1>(t2) == 2);
assert(std::get<0>(t2).alloc_constructed);
}
// test explicit conversions.
// sizeof...(Types) == 1
{
const std::tuple<ConstMove> t1{1};
std::tuple<ExplicitConstructibleFrom<ConstMove>> t2{std::allocator_arg_t{}, test_allocator<int>{}, std::move(t1)};
assert(std::get<0>(t2).v.val == 1);
assert(std::get<0>(t2).alloc_constructed);
}
// test explicit conversions.
// sizeof...(Types) > 1
{
const std::tuple<ConstMove, int> t1{1, 2};
std::tuple<ExplicitConstructibleFrom<ConstMove>, int> t2{std::allocator_arg_t{}, test_allocator<int>{},
std::move(t1)};
assert(std::get<0>(t2).v.val == 1);
assert(std::get<1>(t2) == 2);
assert(std::get<0>(t2).alloc_constructed);
}
// test constraints
// sizeof...(Types) != sizeof...(UTypes)
static_assert(!std::is_constructible_v<std::tuple<int, int>, std::allocator_arg_t, const test_allocator<int>&,
const std::tuple<int>&&>);
static_assert(!std::is_constructible_v<std::tuple<int, int, int>, std::allocator_arg_t, const test_allocator<int>&,
const std::tuple<int, int>&&>);
// !(is_constructible_v<Types, decltype(get<I>(FWD(u)))> && ...)
static_assert(!std::is_constructible_v< std::tuple<int, NoConstructorFromInt>, std::allocator_arg_t,
const test_allocator<int>&, const std::tuple<int, int>&&>);
// sizeof...(Types) == 1 && other branch of "||" satisfied
{
const std::tuple<TracedCopyMove> t1{};
std::tuple<ConvertibleFrom<TracedCopyMove>> t2{std::allocator_arg_t{}, test_allocator<int>{}, std::move(t1)};
assert(constMoveCtrCalled(std::get<0>(t2).v));
assert(std::get<0>(t2).alloc_constructed);
}
// sizeof...(Types) == 1 && is_same_v<T, U>
{
const std::tuple<TracedCopyMove> t1{};
std::tuple<TracedCopyMove> t2{std::allocator_arg_t{}, test_allocator<int>{}, std::move(t1)};
assert(!constMoveCtrCalled(std::get<0>(t2)));
assert(std::get<0>(t2).alloc_constructed);
}
// sizeof...(Types) != 1
{
const std::tuple<TracedCopyMove, TracedCopyMove> t1{};
std::tuple<TracedCopyMove, TracedCopyMove> t2{std::allocator_arg_t{}, test_allocator<int>{}, std::move(t1)};
assert(constMoveCtrCalled(std::get<0>(std::move(t2))));
assert(std::get<0>(t2).alloc_constructed);
}
// These two test points cause gcc to ICE
#if !defined(TEST_COMPILER_GCC)
// sizeof...(Types) == 1 && is_convertible_v<decltype(u), T>
{
const std::tuple<CvtFromTupleRef> t1{};
std::tuple<ConvertibleFrom<CvtFromTupleRef>> t2{std::allocator_arg_t{}, test_allocator<int>{}, std::move(t1)};
assert(!constMoveCtrCalled(std::get<0>(t2).v));
assert(std::get<0>(t2).alloc_constructed);
}
// sizeof...(Types) == 1 && is_constructible_v<decltype(u), T>
{
const std::tuple<ExplicitCtrFromTupleRef> t1{};
std::tuple<ConvertibleFrom<ExplicitCtrFromTupleRef>> t2{std::allocator_arg_t{}, test_allocator<int>{},
std::move(t1)};
assert(!constMoveCtrCalled(std::get<0>(t2).v));
assert(std::get<0>(t2).alloc_constructed);
}
#endif
return true;
}
int main(int, char**) {
test();
static_assert(test());
return 0;
}
|
