EugenyCh7/CodeDOMTest

OpCodesEmit/Program.cs
31 строка1 KB
eugenych
fix
04 авг 2023, 21:25
04 авг 2023, 21:25f3eb43e
using System.Reflection;
using System.Reflection.Emit;

namespace EmitMethodSample
{
    internal class Program
    {
        private static void Main(string[] args)
        {
            AssemblyName asmName = new AssemblyName("MyAssembly");
            AssemblyBuilder builder = AssemblyBuilder.DefineDynamicAssembly(asmName, AssemblyBuilderAccess.Run);
            ModuleBuilder mbuilder = builder.DefineDynamicModule("MyModule");
            TypeBuilder tbuilder = mbuilder.DefineType("MyClass", TypeAttributes.Public);

            MethodBuilder methodSum = tbuilder.DefineMethod("Square", MethodAttributes.Public | MethodAttributes.Static,
                typeof(int),
                new[] { typeof(int) });

            ILGenerator generator = methodSum.GetILGenerator();
            generator.Emit(OpCodes.Ldarg_0);
            generator.Emit(OpCodes.Ldarg_0);
            generator.Emit(OpCodes.Mul);
            generator.Emit(OpCodes.Ret);

            Type thistype = tbuilder.CreateType();
            MethodInfo info = thistype.GetMethod("Square", BindingFlags.Public | BindingFlags.Static)!;
            object result = info.Invoke(null, BindingFlags.Public | BindingFlags.Static, null, new object[] { 12 }, Thread.CurrentThread.CurrentCulture)!;
            Console.WriteLine("Square of 12 : {0}", result);
        }
    }
}