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
|
//
// Copyright (C) 2023 Robert Adam
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE_1_0.txt or copy at
// https://www.boost.org/LICENSE_1_0.txt)
//
#ifndef SOCI_IS_DETECTED_H_INCLUDED
#define SOCI_IS_DETECTED_H_INCLUDED
#include <type_traits>
namespace soci
{
namespace details
{
template<typename...>
using void_t = void;
using false_type = std::integral_constant<bool, false>;
using true_type = std::integral_constant<bool, true>;
// Implementation from https://blog.tartanllama.xyz/detection-idiom/
// Note, this is a stub that we require until standard C++ gets support
// for the detection idiom that is not experimental (and thus can be
// assumed to be present).
namespace detector_detail
{
template <template <class...> class Trait, class Enabler, class... Args>
struct is_detected : false_type {};
template <template <class...> class Trait, class... Args>
struct is_detected<Trait, void_t<Trait<Args...>>, Args...> : true_type {};
}
template <template <class...> class Trait, class... Args>
using is_detected = typename detector_detail::is_detected<Trait, void, Args...>::type;
}
}
#endif // SOCI_IS_DETECTED_H_INCLUDED
|