gcc/d/dmd/aliasthis.d

   1 /**
   2  * Implements the `alias this` symbol.
   3  *
   4  * Specification: $(LINK2 https://dlang.org/spec/class.html#alias-this, Alias This)
   5  *
   6  * Copyright:   Copyright (C) 1999-2024 by The D Language Foundation, All Rights Reserved
   7  * Authors:     $(LINK2 https://www.digitalmars.com, Walter Bright)
   8  * License:     $(LINK2 https://www.boost.org/LICENSE_1_0.txt, Boost License 1.0)
   9  * Source:      $(LINK2 https://github.com/dlang/dmd/blob/master/src/dmd/aliasthis.d, _aliasthis.d)
  10  * Documentation:  https://dlang.org/phobos/dmd_aliasthis.html
  11  * Coverage:    https://codecov.io/gh/dlang/dmd/src/master/src/dmd/aliasthis.d
  12  */
  13
  14 module dmd.aliasthis;
  15
  16 import core.stdc.stdio;
  17
  18 import dmd.dsymbol;
  19 import dmd.identifier;
  20 import dmd.location;
  21 import dmd.visitor;
  22
  23 /***********************************************************
  24  * alias ident this;
  25  */
  26 extern (C++) final class AliasThis : Dsymbol
  27 {
  28     Identifier ident;
  29     /// The symbol this `alias this` resolves to
  30     Dsymbol sym;
  31     /// Whether this `alias this` is deprecated or not
  32     bool isDeprecated_;
  33
  34     extern (D) this(const ref Loc loc, Identifier ident) @safe
  35     {
  36         super(loc, null);    // it's anonymous (no identifier)
  37         this.ident = ident;
  38     }
  39
  40     override AliasThis syntaxCopy(Dsymbol s)
  41     {
  42         assert(!s);
  43         auto at = new AliasThis(loc, ident);
  44         at.comment = comment;
  45         return at;
  46     }
  47
  48     override const(char)* kind() const
  49     {
  50         return "alias this";
  51     }
  52
  53     AliasThis isAliasThis()
  54     {
  55         return this;
  56     }
  57
  58     override void accept(Visitor v)
  59     {
  60         v.visit(this);
  61     }
  62
  63     override bool isDeprecated() const
  64     {
  65         return this.isDeprecated_;
  66     }
  67 }