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
|
// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/assert.hpp>
#include <boost/hana/at.hpp>
#include <boost/hana/basic_tuple.hpp>
#include <laws/base.hpp>
#include <string>
namespace hana = boost::hana;
struct Empty { };
int main() {
{
using T = hana::basic_tuple<>;
T t0;
T t_implicit = t0;
T t_explicit(t0);
(void)t_explicit;
(void)t_implicit;
}
{
using T = hana::basic_tuple<int>;
T t0(2);
T t = t0;
BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 2);
}
{
using T = hana::basic_tuple<int, char>;
T t0(2, 'a');
T t = t0;
BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 2);
BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 'a');
}
{
using T = hana::basic_tuple<int, char, std::string>;
const T t0(2, 'a', "some text");
T t = t0;
BOOST_HANA_RUNTIME_CHECK(hana::at_c<0>(t) == 2);
BOOST_HANA_RUNTIME_CHECK(hana::at_c<1>(t) == 'a');
BOOST_HANA_RUNTIME_CHECK(hana::at_c<2>(t) == "some text");
}
{
using T = hana::basic_tuple<int>;
constexpr T t0(2);
constexpr T t = t0;
static_assert(hana::at_c<0>(t) == 2, "");
}
{
using T = hana::basic_tuple<Empty>;
constexpr T t0{};
constexpr T t = t0;
constexpr Empty e = hana::at_c<0>(t); (void)e;
}
{
struct T { };
struct U { };
constexpr hana::basic_tuple<T, U> binary{};
constexpr hana::basic_tuple<T, U> copy_implicit = binary;
constexpr hana::basic_tuple<T, U> copy_explicit(binary);
(void)copy_implicit;
(void)copy_explicit;
}
// This used to fail
{
hana::basic_tuple<
hana::test::ct_eq<0>,
hana::test::ct_eq<2>,
hana::test::ct_eq<4>
> tuple{};
hana::basic_tuple<
hana::test::ct_eq<0>,
hana::test::ct_eq<2>,
hana::test::ct_eq<4>
> copy(tuple);
}
}
|
