vala/valaunresolvedsymbol.vala

   1 /* valaunresolvedsymbol.vala
   2  *
   3  * Copyright (C) 2008-2009  Jürg Billeter
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  18  *
  19  * Author:
  20  *      Jürg Billeter <j@bitron.ch>
  21  */
  22
  23 /**
  24  * An unresolved reference to a symbol.
  25  */
  26 public class Vala.UnresolvedSymbol : Symbol {
  27         /**
  28          * The parent of the symbol or null.
  29          */
  30         public UnresolvedSymbol? inner { get; set; }
  31
  32         /**
  33          * Qualified access to global symbol.
  34          */
  35         public bool qualified { get; set; }
  36
  37         public UnresolvedSymbol (UnresolvedSymbol? inner, string name, SourceReference? source_reference = null) {
  38                 base (name, source_reference);
  39                 this.inner = inner;
  40         }
  41
  42         public static UnresolvedSymbol? new_from_expression (Expression expr) {
  43                 var ma = expr as MemberAccess;
  44                 if (ma != null) {
  45                         if (ma.inner != null) {
  46                                 return new UnresolvedSymbol (new_from_expression (ma.inner), ma.member_name, ma.source_reference);
  47                         } else {
  48                                 return new UnresolvedSymbol (null, ma.member_name, ma.source_reference);
  49                         }
  50                 }
  51
  52                 Report.error (expr.source_reference, "Type reference must be simple name or member access expression");
  53                 return null;
  54         }
  55
  56         public override string to_string () {
  57                 if (inner == null) {
  58                         return name;
  59                 } else {
  60                         return "%s.%s".printf (inner.to_string (), name);
  61                 }
  62         }
  63
  64         public UnresolvedSymbol copy () {
  65                 return new UnresolvedSymbol (inner, name, source_reference);
  66         }
  67 }
  68