gcc/d/dmd/root/rootobject.d

   1 /**
   2  * Provide the root object that AST classes in dmd inherit from.
   3  *
   4  * Copyright: Copyright (C) 1999-2023 by The D Language Foundation, All Rights Reserved
   5  * Authors:   Walter Bright, https://www.digitalmars.com
   6  * License:   $(LINK2 https://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
   7  * Source:    $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/root/rootobject.d, root/_rootobject.d)
   8  * Documentation:  https://dlang.org/phobos/dmd_root_rootobject.html
   9  * Coverage:    https://codecov.io/gh/dlang/dmd/src/master/src/dmd/root/rootobject.d
  10  */
  11
  12 module dmd.root.rootobject;
  13
  14 /***********************************************************
  15  */
  16
  17 enum DYNCAST : int
  18 {
  19     object,
  20     expression,
  21     dsymbol,
  22     type,
  23     identifier,
  24     tuple,
  25     parameter,
  26     statement,
  27     condition,
  28     templateparameter,
  29     initializer,
  30 }
  31
  32 /***********************************************************
  33  */
  34
  35 extern (C++) class RootObject
  36 {
  37     this() nothrow pure @nogc @safe scope
  38     {
  39     }
  40
  41     bool equals(const RootObject o) const
  42     {
  43         return o is this;
  44     }
  45
  46     const(char)* toChars() const
  47     {
  48         assert(0);
  49     }
  50
  51     ///
  52     extern(D) const(char)[] toString() const
  53     {
  54         import core.stdc.string : strlen;
  55         auto p = this.toChars();
  56         return p[0 .. strlen(p)];
  57     }
  58
  59     DYNCAST dyncast() const nothrow pure @nogc @safe
  60     {
  61         return DYNCAST.object;
  62     }
  63 }