Created
July 3, 2020 16:49
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Call __arglist method with Reflection.Emit
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| using System; | |
| using System.Linq; | |
| using System.Reflection; | |
| using System.Reflection.Emit; | |
| namespace ConsoleApp4 | |
| { | |
| public class Program | |
| { | |
| public static void Callee(__arglist) | |
| { | |
| var iterator = new ArgIterator(__arglist); | |
| while (iterator.GetRemainingCount() > 0) | |
| { | |
| Console.WriteLine( | |
| __refvalue(iterator.GetNextArg(), string)); | |
| } | |
| } | |
| static void Main() | |
| { | |
| var args = new object[] {"a", "b", "×"}; | |
| var callee = typeof(Program).GetMethod("Callee", BindingFlags.Static|BindingFlags.Public); | |
| MakeCall(callee, args); | |
| } | |
| private static void MakeCall(MethodInfo callee, object[] args) | |
| { | |
| var name = new AssemblyName("ZOG"); | |
| var ass = AssemblyBuilder.DefineDynamicAssembly(name, AssemblyBuilderAccess.Run); | |
| var moduleBuilder = ass.DefineDynamicModule("COG"); | |
| var typeBuilder = moduleBuilder.DefineType("MUG", | |
| TypeAttributes.Public | TypeAttributes.Class | TypeAttributes.BeforeFieldInit); | |
| var parameterTypes = args.Select(δ => δ.GetType()).ToArray(); | |
| var methodBuilder = typeBuilder.DefineMethod("Main", MethodAttributes.Public | MethodAttributes.Static, | |
| typeof(void), parameterTypes); | |
| var ilGenerator = methodBuilder.GetILGenerator(); | |
| GeneratedCode(ilGenerator, callee, parameterTypes); | |
| var mug = typeBuilder.CreateType(); | |
| var main = mug.GetMethod("Main", BindingFlags.Public | BindingFlags.Static); | |
| main.Invoke(null, args); | |
| } | |
| private static void GeneratedCode(ILGenerator ilGenerator, MethodInfo callee, Type[] types) | |
| { | |
| for (var i = 0; i < types.Length; ++i) | |
| ilGenerator.Emit(OpCodes.Ldarg, (short)i); | |
| ilGenerator.EmitCall(OpCodes.Call, callee, types); | |
| ilGenerator.Emit(OpCodes.Ret); | |
| } | |
| } | |
| } |
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