public static MethodBuilder CreateDelegateImplementation(TypeBuilder typeBuilder, FieldBuilder targetField, MethodInfo mi)
{
MethodBuilder methodBuilder = typeBuilder.DefineMethod(mi.Name,
MethodAttributes.Public | MethodAttributes.Virtual,
mi.ReturnType,
mi.GetParameters().Select(param => param.ParameterType).ToArray());
ILGenerator il = methodBuilder.GetILGenerator();
#region forwarding implementation
LocalBuilder baseReturn = null;
if (mi.ReturnType != typeof(void))
{
baseReturn = il.DeclareLocal(mi.ReturnType);
}
// Call the target method
il.Emit(OpCodes.Ldarg_0);
il.Emit(OpCodes.Ldfld, targetField);
// Load the call parameters
for (int i = 0; i < mi.GetParameters().Length; i++)
{
CodeGenUtil.EmitLoadArgument(il, i);
}
// Make the call
MethodInfo callTarget = targetField.FieldType.GetMethod(mi.Name, mi.GetParameters().Select(pi => pi.ParameterType).ToArray());
il.Emit(OpCodes.Callvirt, callTarget);
if (mi.ReturnType != typeof(void))
{
il.Emit(OpCodes.Stloc_0);
il.Emit(OpCodes.Ldloc_0);
}
il.Emit(OpCodes.Ret);
#endregion
return(methodBuilder);
}
