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
87
88
89
|
// -*-c++-*-
// vim: set ft=cpp:
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
file LICENSE.rst or https://cmake.org/licensing for details. */
#pragma once
#include <type_traits> // IWYU pragma: export
namespace cm {
#if __cplusplus >= 201402L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201402L)
// Miscellaneous transformations
template <bool B, typename T = void>
using enable_if_t = std::enable_if_t<B, T>;
#else
// Miscellaneous transformations
template <bool B, typename T = void>
using enable_if_t = typename std::enable_if<B, T>::type;
#endif
#if __cplusplus >= 201703L || (defined(_MSVC_LANG) && _MSVC_LANG >= 201703L)
// Helper classes
using std::bool_constant;
// Miscellaneous transformations
using std::invoke_result;
using std::invoke_result_t;
using std::void_t;
#else
// Helper classes
template <bool B>
using bool_constant = std::integral_constant<bool, B>;
// Miscellaneous transformations
template <typename F, typename... ArgTypes>
using invoke_result = std::result_of<F(ArgTypes...)>;
template <class F, typename... ArgTypes>
using invoke_result_t = typename invoke_result<F, ArgTypes...>::type;
template <typename... ArgTypes>
struct make_void
{
typedef void type;
};
template <typename... ArgTypes>
using void_t = typename make_void<ArgTypes...>::type;
#endif
#if (__cplusplus >= 202302L || \
(defined(_MSVC_LANG) && _MSVC_LANG >= 202302L)) && \
__cpp_lib_is_scoped_enum == 202011L
using std::is_scoped_enum;
#else
namespace internals {
template <typename T, bool = std::is_enum<T>::value>
struct is_scoped_enum_helper : std::false_type
{
};
template <typename T>
struct is_scoped_enum_helper<T, true>
: public cm::bool_constant<
!std::is_convertible<T, typename std::underlying_type<T>::type>::value>
{
};
}
template <typename T>
struct is_scoped_enum : public internals::is_scoped_enum_helper<T>
{
};
#endif
} // namespace cm
|
