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
|
// -*-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 "cmSTL.hxx" // IWYU pragma: keep
#include <memory> // IWYU pragma: export
#if !defined(CMake_HAVE_CXX_MAKE_UNIQUE)
# include <cstddef>
# include <type_traits>
# include <utility>
#endif
namespace cm {
#if defined(CMake_HAVE_CXX_MAKE_UNIQUE)
using std::make_unique;
#else
namespace internals {
template <typename T>
struct make_unique_if
{
using single = std::unique_ptr<T>;
};
template <typename T>
struct make_unique_if<T[]>
{
using unbound_array = std::unique_ptr<T[]>;
};
template <typename T, std::size_t N>
struct make_unique_if<T[N]>
{
using bound_array = void;
};
}
template <typename T, typename... Args>
typename internals::make_unique_if<T>::single make_unique(Args&&... args)
{
return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
}
template <typename T>
typename internals::make_unique_if<T>::unbound_array make_unique(std::size_t n)
{
using E = typename std::remove_extent<T>::type;
return std::unique_ptr<T>(new E[n]());
}
template <typename T, typename... Args>
typename internals::make_unique_if<T>::bound_array make_unique(Args&&...) =
delete;
#endif
} // namespace cm
|
