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
|
// 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/equal.hpp>
#include <boost/hana/experimental/types.hpp>
#include <boost/hana/transform.hpp>
#include <boost/hana/type.hpp>
namespace hana = boost::hana;
template <typename ...>
struct mf { struct type; };
template <int> struct x;
struct undefined { };
int main() {
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<>{}, undefined{}),
hana::experimental::types<>{}
));
// with a Metafunction
{
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>>{}, hana::metafunction<mf>),
hana::experimental::types<mf<x<0>>::type>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>, x<1>>{}, hana::metafunction<mf>),
hana::experimental::types<mf<x<0>>::type, mf<x<1>>::type>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>, x<1>, x<2>>{}, hana::metafunction<mf>),
hana::experimental::types<mf<x<0>>::type, mf<x<1>>::type, mf<x<2>>::type>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>, x<1>, x<2>, x<3>>{}, hana::metafunction<mf>),
hana::experimental::types<mf<x<0>>::type, mf<x<1>>::type, mf<x<2>>::type, mf<x<3>>::type>{}
));
}
// with a non-Metafunction
{
auto f = [](auto t) {
return hana::metafunction<mf>(t);
};
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>>{}, f),
hana::experimental::types<mf<x<0>>::type>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>, x<1>>{}, f),
hana::experimental::types<mf<x<0>>::type, mf<x<1>>::type>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>, x<1>, x<2>>{}, f),
hana::experimental::types<mf<x<0>>::type, mf<x<1>>::type, mf<x<2>>::type>{}
));
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::transform(hana::experimental::types<x<0>, x<1>, x<2>, x<3>>{}, f),
hana::experimental::types<mf<x<0>>::type, mf<x<1>>::type, mf<x<2>>::type, mf<x<3>>::type>{}
));
}
}
|
