gcc/d/dmd/root/object.h

   1
   2 /* Copyright (C) 1999-2018 by The D Language Foundation, All Rights Reserved
   3  * http://www.digitalmars.com
   4  * Distributed under the Boost Software License, Version 1.0.
   5  * (See accompanying file LICENSE or copy at http://www.boost.org/LICENSE_1_0.txt)
   6  * https://github.com/dlang/dmd/blob/master/src/root/object.h
   7  */
   8
   9 #define POSIX (__linux__ || __APPLE__ || __FreeBSD__ || __OpenBSD__ || __sun)
  10
  11 #pragma once
  12
  13 #include <stddef.h>
  14
  15 typedef size_t hash_t;
  16
  17 struct OutBuffer;
  18
  19 enum 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 };
  30
  31 /*
  32  * Root of our class library.
  33  */
  34 class RootObject
  35 {
  36 public:
  37     RootObject() { }
  38
  39     virtual bool equals(RootObject *o);
  40
  41     /**
  42      * Return <0, ==0, or >0 if this is less than, equal to, or greater than obj.
  43      * Useful for sorting Objects.
  44      */
  45     virtual int compare(RootObject *obj);
  46
  47     /**
  48      * Pretty-print an Object. Useful for debugging the old-fashioned way.
  49      */
  50     virtual void print();
  51
  52     virtual const char *toChars();
  53     virtual void toBuffer(OutBuffer *buf);
  54
  55     /**
  56      * Used as a replacement for dynamic_cast. Returns a unique number
  57      * defined by the library user. For Object, the return value is 0.
  58      */
  59     virtual int dyncast() const;
  60 };