Add support for arglist opcode.

ICSharpCode.Decompiler/Ast/AstBuilder.cs

@@ -257,7 +257,7 @@ namespace ICSharpCode.Decompiler.Ast
 				foreach (var m in typeDef.Methods) {
 					if (m.Name == "Invoke") {
 						dd.ReturnType = ConvertType(m.ReturnType, m.MethodReturnType);
-						dd.Parameters.AddRange(MakeParameters(m.Parameters));
+						dd.Parameters.AddRange(MakeParameters(m));
 					}
 				}
 				result = dd;
@@ -618,7 +618,7 @@ namespace ICSharpCode.Decompiler.Ast
 			astMethod.ReturnType = ConvertType(methodDef.ReturnType, methodDef.MethodReturnType);
 			astMethod.Name = CleanName(methodDef.Name);
 			astMethod.TypeParameters.AddRange(MakeTypeParameters(methodDef.GenericParameters));
-			astMethod.Parameters.AddRange(MakeParameters(methodDef.Parameters));
+			astMethod.Parameters.AddRange(MakeParameters(methodDef));
 			astMethod.Constraints.AddRange(MakeConstraints(methodDef.GenericParameters));
 			if (!methodDef.DeclaringType.IsInterface) {
 				if (!methodDef.HasOverrides) {
@@ -706,7 +706,7 @@ namespace ICSharpCode.Decompiler.Ast
 				astMethod.Modifiers &= ~Modifiers.VisibilityMask;
 			}
 			astMethod.Name = CleanName(methodDef.DeclaringType.Name);
-			astMethod.Parameters.AddRange(MakeParameters(methodDef.Parameters));
+			astMethod.Parameters.AddRange(MakeParameters(methodDef));
 			astMethod.Body = AstMethodBodyBuilder.CreateMethodBody(methodDef, context, astMethod.Parameters);
 			ConvertAttributes(astMethod, methodDef);
 			return astMethod;
@@ -857,6 +857,16 @@ namespace ICSharpCode.Decompiler.Ast
 			return astField;
 		}
 		
+		public static IEnumerable<ParameterDeclaration> MakeParameters(MethodDefinition method, bool isLambda = false)
+		{
+			var parameters = MakeParameters(method.Parameters, isLambda);
+			if (method.CallingConvention == MethodCallingConvention.VarArg) {
+				return parameters.Concat(new[] { new ParameterDeclaration { Name = "__arglist" } });
+			} else {
+				return parameters;
+			}
+		}
+		
 		public static IEnumerable<ParameterDeclaration> MakeParameters(IEnumerable<ParameterDefinition> paramCol, bool isLambda = false)
 		{
 			foreach(ParameterDefinition paramDef in paramCol) {

ICSharpCode.Decompiler/Ast/AstMethodBodyBuilder.cs

@@ -476,7 +476,8 @@ namespace ICSharpCode.Decompiler.Ast
 					else
 						return new AssignmentExpression(new UnaryOperatorExpression(UnaryOperatorType.Dereference, arg1), arg2);
 					#endregion
-					case ILCode.Arglist:  return InlineAssembly(byteCode, args);
+				case ILCode.Arglist:
+					return new ArgListExpression { IsAccess = true };
 					case ILCode.Break:    return InlineAssembly(byteCode, args);
 				case ILCode.Call:
 				case ILCode.CallGetter:

ICSharpCode.Decompiler/Ast/Transforms/DelegateConstruction.cs

@@ -119,7 +119,7 @@ namespace ICSharpCode.Decompiler.Ast.Transforms
 			
 			// Create AnonymousMethodExpression and prepare parameters
 			AnonymousMethodExpression ame = new AnonymousMethodExpression();
-			ame.Parameters.AddRange(AstBuilder.MakeParameters(method.Parameters, isLambda: true));
+			ame.Parameters.AddRange(AstBuilder.MakeParameters(method, isLambda: true));
 			ame.HasParameterList = true;
 			
 			// rename variables so that they don't conflict with the parameters:

ILSpy/TreeNodes/MethodTreeNode.cs

@@ -60,6 +60,11 @@ namespace ICSharpCode.ILSpy.TreeNodes
 					b.Append(", ");
 				b.Append(language.TypeToString(method.Parameters[i].ParameterType, false, method.Parameters[i]));
 			}
+			if (method.CallingConvention == MethodCallingConvention.VarArg) {
+				if (method.HasParameters)
+					b.Append(", ");
+				b.Append("...");
+			}
 			b.Append(") : ");
 			b.Append(language.TypeToString(method.ReturnType, false, method.MethodReturnType));
 			return HighlightSearchMatch(method.Name, b.ToString());
@@ -85,7 +90,7 @@ namespace ICSharpCode.ILSpy.TreeNodes
 			}
 
 			if (method.IsSpecialName &&
-				(method.Name == ".ctor" || method.Name == ".cctor")) {
+			    (method.Name == ".ctor" || method.Name == ".cctor")) {
 				return Images.GetIcon(MemberIcon.Constructor, GetOverlayIcon(method.Attributes), false);
 			}