blob: bdc234afec550f734958605e440cc6485a5d14f5 (
plain)
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
|
// 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)
#ifndef TEST_SUPPORT_CONSTEXPR_MOVE_ONLY_HPP
#define TEST_SUPPORT_CONSTEXPR_MOVE_ONLY_HPP
#include <boost/hana/bool.hpp>
#include <boost/hana/fwd/hash.hpp>
#include <boost/hana/type.hpp>
#include <utility>
// A move-only type that's also a literal type. It is also Comparable and
// Hashable so it can be used in associative containers.
template <int i>
struct ConstexprMoveOnly {
constexpr ConstexprMoveOnly() { }
constexpr ConstexprMoveOnly(ConstexprMoveOnly const&) = delete;
constexpr ConstexprMoveOnly& operator=(ConstexprMoveOnly const&) = delete;
constexpr ConstexprMoveOnly(ConstexprMoveOnly&&) { }
};
template <int i, int j>
constexpr auto operator==(ConstexprMoveOnly<i> const&, ConstexprMoveOnly<j> const&)
{ return boost::hana::bool_c<i == j>; }
template <int i, int j>
constexpr auto operator!=(ConstexprMoveOnly<i> const&, ConstexprMoveOnly<j> const&)
{ return boost::hana::bool_c<i != j>; }
namespace boost { namespace hana {
template <int i>
struct hash_impl<ConstexprMoveOnly<i>> {
static constexpr auto apply(ConstexprMoveOnly<i> const&)
{ return hana::type_c<ConstexprMoveOnly<i>>; };
};
}}
#endif // !TEST_SUPPORT_CONSTEXPR_MOVE_ONLY_HPP
|
