Tools/DynamicProxy/Castle.DynamicProxy/Builder/CodeBuilder/SimpleAST/MethodTokenExpression.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;
  19         using System.Reflection.Emit;
  20
  21         /// <summary>
  22         /// Summary description for MethodTokenExpression.
  23         /// </summary>
  24         [CLSCompliant(false)]
  25         public class MethodTokenExpression : Expression
  26         {
  27                 private MethodInfo _method;
  28
  29                 public MethodTokenExpression( MethodInfo method )
  30                 {
  31                         _method = method;
  32                 }
  33
  34                 public override void Emit(IEasyMember member, ILGenerator gen)
  35                 {
  36                         gen.Emit(OpCodes.Ldtoken, _method);
  37 #if DOTNET2 && !MONO // Needed to support generics
  38                         gen.Emit(OpCodes.Ldtoken, _method.DeclaringType);
  39 #endif
  40                         MethodInfo minfo = typeof(MethodBase).GetMethod(
  41                                 "GetMethodFromHandle", BindingFlags.Static|BindingFlags.Public, null,
  42                                 new Type[] { typeof(RuntimeMethodHandle),
  43 #if DOTNET2 && !MONO // Needed to support generics
  44                                         typeof(RuntimeTypeHandle)
  45 #endif
  46                                 }, null);
  47
  48                         gen.Emit(OpCodes.Call, minfo);
  49
  50                         gen.Emit(OpCodes.Castclass, typeof(MethodInfo));
  51                 }
  52         }
  53 }