Tools/DynamicProxy/Castle.DynamicProxy/Builder/CodeBuilder/SimpleAST/ArgumentReference.cs

   1 // Copyright 2004-2007 Castle Project - http://www.castleproject.org/
   2 //
   3 // Licensed under the Apache License, Version 2.0 (the "License");
   4 // you may not use this file except in compliance with the License.
   5 // You may obtain a copy of the License at
   6 //
   7 //     http://www.apache.org/licenses/LICENSE-2.0
   8 //
   9 // Unless required by applicable law or agreed to in writing, software
  10 // distributed under the License is distributed on an "AS IS" BASIS,
  11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  12 // See the License for the specific language governing permissions and
  13 // limitations under the License.
  14
  15 namespace Castle.DynamicProxy.Builder.CodeBuilder.SimpleAST
  16 {
  17         using System;
  18         using System.Reflection.Emit;
  19
  20         /// <summary>
  21         /// Summary description for ArgumentReference.
  22         /// </summary>
  23         [CLSCompliant(false)]
  24         public class ArgumentReference : TypeReference
  25         {
  26                 private int _position = -1;
  27
  28                 public ArgumentReference( Type argumentType ) : base(argumentType)
  29                 {
  30                 }
  31
  32                 internal int Position
  33                 {
  34                         get { return _position; }
  35                         set { _position = value; }
  36                 }
  37
  38                 public override void LoadReference(ILGenerator gen)
  39                 {
  40                         if (Position == -1)
  41                         {
  42                                 throw new ApplicationException("ArgumentReference unitialized");
  43                         }
  44                         switch(Position)
  45                         {
  46                                 case 0:
  47                                         gen.Emit(OpCodes.Ldarg_0);
  48                                         break;
  49                                 case 1:
  50                                         gen.Emit(OpCodes.Ldarg_1);
  51                                         break;
  52                                 case 2:
  53                                         gen.Emit(OpCodes.Ldarg_2);
  54                                         break;
  55                                 case 3:
  56                                         gen.Emit(OpCodes.Ldarg_3);
  57                                         break;
  58                                 default:
  59                                         gen.Emit(OpCodes.Ldarg, Position);
  60                                         break;
  61                         }
  62                 }
  63
  64                 public override void StoreReference(ILGenerator gen)
  65                 {
  66                         // Invalid operation
  67                         // We'd like to keep arguments read-only
  68                         throw new NotImplementedException();
  69                 }
  70
  71                 public override void LoadAddressOfReference(ILGenerator gen)
  72                 {
  73                         throw new NotSupportedException();
  74                 }
  75         }
  76 }