1
2/* Copyright (C) 1999-2022 by The D Language Foundation, All Rights Reserved
3 * written by Walter Bright
4 * https://www.digitalmars.com
5 * Distributed under the Boost Software License, Version 1.0.
6 * https://www.boost.org/LICENSE_1_0.txt
7 * https://github.com/dlang/dmd/blob/master/src/dmd/root/object.h
8 */
9
10#pragma once
11
12#include "dsystem.h"
13#include "dcompat.h"
14
15typedef size_t hash_t;
16
17struct OutBuffer;
18
19enum DYNCAST
20{
21    DYNCAST_OBJECT,
22    DYNCAST_EXPRESSION,
23    DYNCAST_DSYMBOL,
24    DYNCAST_TYPE,
25    DYNCAST_IDENTIFIER,
26    DYNCAST_TUPLE,
27    DYNCAST_PARAMETER,
28    DYNCAST_STATEMENT,
29    DYNCAST_TEMPLATEPARAMETER
30};
31
32/*
33 * Root of our class library.
34 */
35class RootObject
36{
37public:
38    RootObject() { }
39
40    virtual bool equals(const RootObject *o) const;
41
42    /**
43     * Pretty-print an Object. Useful for debugging the old-fashioned way.
44     */
45    virtual const char *toChars() const;
46    /// This function is `extern(D)` and should not be called from C++,
47    /// as the ABI does not match on some platforms
48    virtual DString toString();
49
50    /**
51     * Used as a replacement for dynamic_cast. Returns a unique number
52     * defined by the library user. For Object, the return value is 0.
53     */
54    virtual DYNCAST dyncast() const;
55};
56