63e88f80
 Hu Chunming
提交三方库
|
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
|
/*!
@file
Defines `boost::hana::adjust`.
Copyright Louis Dionne 2013-2022
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 BOOST_HANA_ADJUST_HPP
#define BOOST_HANA_ADJUST_HPP
#include <boost/hana/fwd/adjust.hpp>
#include <boost/hana/adjust_if.hpp>
#include <boost/hana/concept/functor.hpp>
#include <boost/hana/config.hpp>
#include <boost/hana/core/dispatch.hpp>
#include <boost/hana/equal.hpp>
namespace boost { namespace hana {
//! @cond
template <typename Xs, typename Value, typename F>
constexpr auto adjust_t::operator()(Xs&& xs, Value&& value, F&& f) const {
using S = typename hana::tag_of<Xs>::type;
using Adjust = BOOST_HANA_DISPATCH_IF(adjust_impl<S>,
hana::Functor<S>::value
);
#ifndef BOOST_HANA_CONFIG_DISABLE_CONCEPT_CHECKS
static_assert(hana::Functor<S>::value,
"hana::adjust(xs, value, f) requires 'xs' to be a Functor");
#endif
return Adjust::apply(static_cast<Xs&&>(xs),
static_cast<Value&&>(value),
static_cast<F&&>(f));
}
//! @endcond
template <typename Fun, bool condition>
struct adjust_impl<Fun, when<condition>> : default_ {
template <typename Xs, typename Value, typename F>
static constexpr auto apply(Xs&& xs, Value&& value, F&& f) {
return hana::adjust_if(
static_cast<Xs&&>(xs),
hana::equal.to(static_cast<Value&&>(value)),
static_cast<F&&>(f)
);
}
};
}} // end namespace boost::hana
#endif // !BOOST_HANA_ADJUST_HPP
|
