any.h

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Alex Alex Commit Client Upload Part 2 19/10/2026 00:06
1/*
2 * Copyright (c) 2010-2017 OTClient <https://github.com/edubart/otclient>
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a copy
5 * of this software and associated documentation files (the "Software"), to deal
6 * in the Software without restriction, including without limitation the rights
7 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
8 * copies of the Software, and to permit persons to whom the Software is
9 * furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
13 *
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
17 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
18 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
19 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
20 * THE SOFTWARE.
21 */
22
23#ifndef STDEXT_ANY_H
24#define STDEXT_ANY_H
25
26#include <algorithm>
27#include <typeinfo>
28
29namespace stdext {
30
31class any {
32public:
33 struct placeholder {
34 virtual ~placeholder() { }
35 virtual const std::type_info& type() const = 0;
36 virtual placeholder* clone() const = 0;
37 };
38
39 template<typename T>
40 struct holder : public placeholder {
41 holder(const T& value) : held(value) { }
42 const std::type_info& type() const { return typeid(T); }
43 placeholder* clone() const { return new holder(held); }
44 T held;
45 private:
46 holder& operator=(const holder &);
47 };
48
49 placeholder* content;
50
51 any() : content(nullptr) { }
52 any(const any& other) : content(other.content ? other.content->clone() : nullptr) { }
53 template<typename T> any(const T& value) : content(new holder<T>(value)) { }
54 ~any() { if(content) delete content; }
55
56 any& swap(any& rhs) { std::swap(content, rhs.content); return *this; }
57
58 template<typename T> any& operator=(const T& rhs) { any(rhs).swap(*this); return *this; }
59 any& operator=(any rhs) { rhs.swap(*this); return *this; }
60
61 bool empty() const { return !content; }
62 template<typename T> const T& cast() const;
63 const std::type_info & type() const { return content ? content->type() : typeid(void); }
64};
65
66template<typename T>
67const T& any_cast(const any& operand) {
68 VALIDATE(operand.type() == typeid(T));
69 return static_cast<any::holder<T>*>(operand.content)->held;
70}
71
72template<typename T> const T& any::cast() const { return any_cast<T>(*this); }
73
74}
75
76#endif
77
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