src/Boo.Lang.Compiler/TypeSystem/InternalEnum.cs

   1 #region license
   2 // Copyright (c) 2004, Rodrigo B. de Oliveira (rbo@acm.org)
   3 // All rights reserved.
   4 //
   5 // Redistribution and use in source and binary forms, with or without modification,
   6 // are permitted provided that the following conditions are met:
   7 //
   8 //     * Redistributions of source code must retain the above copyright notice,
   9 //     this list of conditions and the following disclaimer.
  10 //     * Redistributions in binary form must reproduce the above copyright notice,
  11 //     this list of conditions and the following disclaimer in the documentation
  12 //     and/or other materials provided with the distribution.
  13 //     * Neither the name of Rodrigo B. de Oliveira nor the names of its
  14 //     contributors may be used to endorse or promote products derived from this
  15 //     software without specific prior written permission.
  16 //
  17 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  18 // ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  19 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  20 // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  21 // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22 // DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  23 // SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  24 // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  25 // OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26 // THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27 #endregion
  28
  29 namespace Boo.Lang.Compiler.TypeSystem
  30 {
  31         using Boo.Lang.Compiler.Ast;
  32
  33         public class InternalEnum : AbstractInternalType
  34         {
  35                 internal InternalEnum(TypeSystemServices tagManager, EnumDefinition enumDefinition) :
  36                         base(tagManager, enumDefinition)
  37                 {
  38                 }
  39
  40                 override public bool IsFinal
  41                 {
  42                         get
  43                         {
  44                                 return true;
  45                         }
  46                 }
  47
  48                 override public bool IsValueType
  49                 {
  50                         get
  51                         {
  52                                 return true;
  53                         }
  54                 }
  55
  56                 override public IType BaseType
  57                 {
  58                         get
  59                         {
  60                                 return _typeSystemServices.EnumType;
  61                         }
  62                 }
  63
  64                 override public bool Resolve(List targetList, string name, EntityType flags)
  65                 {
  66                         bool found = base.Resolve(targetList, name, flags);
  67                         if (!found)
  68                         {
  69                                 if (BaseType.Resolve(targetList, name, flags))
  70                                 {
  71                                         found = true;
  72                                 }
  73                         }
  74                         return found;
  75                 }
  76
  77                 override public bool IsSubclassOf(IType type)
  78                 {
  79                         return type == _typeSystemServices.EnumType ||
  80                                 _typeSystemServices.EnumType.IsSubclassOf(type);
  81                 }
  82         }
  83 }