vala/valatypeparameter.vala

   1 /* valatypeparameter.vala
   2  *
   3  * Copyright (C) 2006-2009  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 using GLib;
  24
  25 /**
  26  * Represents a generic type parameter in the source code.
  27  */
  28 public class Vala.TypeParameter : Symbol {
  29         /**
  30          * Creates a new generic type parameter.
  31          *
  32          * @param name              parameter name
  33          * @param source_reference  reference to source code
  34          * @return                  newly created generic type parameter
  35          */
  36         public TypeParameter (string name, SourceReference source_reference) {
  37                 base (name, source_reference);
  38         }
  39
  40         public override void accept (CodeVisitor visitor) {
  41                 visitor.visit_type_parameter (this);
  42         }
  43
  44         /**
  45          * Checks two type parameters for equality.
  46          *
  47          * @param param2 a type parameter
  48          * @return      true if this type parameter is equal to param2, false
  49          *              otherwise
  50          */
  51         public bool equals (TypeParameter param2) {
  52                 /* only type parameters with a common scope are comparable */
  53                 if (!owner.is_subscope_of (param2.owner) && !param2.owner.is_subscope_of (owner)) {
  54                         Report.error (source_reference, "internal error: comparing type parameters from different scopes");
  55                         return false;
  56                 }
  57
  58                 return name == param2.name && parent_symbol == param2.parent_symbol;
  59         }
  60 }