blob: 86b1e2c1f73d5209e9b3f9b6d3e8445150c600c4 (
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
42
43
44
45
46
47
48
49
|
#pragma once
#include <cassert>
template <class T, class TBase>
bool is_a(TBase* t)
{
assert(t != nullptr);
return T::IsInstance(t);
}
template <class T, class TBase>
bool is_a_nullable(TBase* t)
{
if (t) {
return is_a<T, TBase>(t);
} else {
return false;
}
}
template <class T, class TBase>
T* dyn_cast(TBase* t)
{
assert(t != nullptr);
if (T::IsInstance(t)) {
return static_cast<T*>(t);
} else {
return nullptr;
}
}
template <class T, class TBase>
const T* dyn_cast(const TBase* t)
{
assert(t != nullptr);
if (T::IsInstance(t)) {
return static_cast<const T*>(t);
} else {
return nullptr;
}
}
template <class T, class TBase>
T* dyn_cast_nullable(TBase* t)
{
if (!t) return nullptr;
return dyn_cast<T, TBase>(t);
}
|
