1 /* ****************************************************************************
3 * Copyright (c) Microsoft Corporation.
5 * This source code is subject to terms and conditions of the Apache License, Version 2.0. A
6 * copy of the license can be found in the License.html file at the root of this distribution. If
7 * you cannot locate the Apache License, Version 2.0, please send an email to
8 * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound
9 * by the terms of the Apache License, Version 2.0.
11 * You must not remove this notice, or any other, from this software.
14 * ***************************************************************************/
17 using System.Dynamic.Utils;
18 using System.Reflection;
19 using System.Reflection.Emit;
22 namespace Microsoft.Scripting.Ast.Compiler {
24 namespace System.Linq.Expressions.Compiler {
26 internal static partial class DelegateHelpers {
27 private const MethodAttributes CtorAttributes = MethodAttributes.RTSpecialName | MethodAttributes.HideBySig | MethodAttributes.Public;
28 private const MethodImplAttributes ImplAttributes = MethodImplAttributes.Runtime | MethodImplAttributes.Managed;
29 private const MethodAttributes InvokeAttributes = MethodAttributes.Public | MethodAttributes.HideBySig | MethodAttributes.NewSlot | MethodAttributes.Virtual;
30 private static readonly Type[] _DelegateCtorSignature = new Type[] { typeof(object), typeof(IntPtr) };
32 private static Type MakeNewCustomDelegate(Type[] types) {
33 Type returnType = types[types.Length - 1];
34 Type[] parameters = types.RemoveLast();
36 TypeBuilder builder = AssemblyGen.DefineDelegateType("Delegate" + types.Length);
37 builder.DefineConstructor(CtorAttributes, CallingConventions.Standard, _DelegateCtorSignature).SetImplementationFlags(ImplAttributes);
38 builder.DefineMethod("Invoke", InvokeAttributes, returnType, parameters).SetImplementationFlags(ImplAttributes);
39 return builder.CreateType();