|
- using System;
- using System.Reflection;
- using System.Reflection.Emit;
-
- namespace Svelto.Utilities
- {
- //https://stackoverflow.com/questions/321650/how-do-i-set-a-field-value-in-an-c-sharp-expression-tree/321686#321686
-
- public static class FastInvoke<T> where T : class
- {
- public static Action<T, object> MakeSetter(FieldInfo field)
- {
- if (field.FieldType.IsInterface == true && field.FieldType.IsValueType == false)
- {
- DynamicMethod m = new DynamicMethod("setter", typeof(void), new Type[] { typeof(T), typeof(object) });
- ILGenerator cg = m.GetILGenerator();
-
- // arg0.<field> = arg1
- cg.Emit(OpCodes.Ldarg_0);
- cg.Emit(OpCodes.Ldarg_1);
- cg.Emit(OpCodes.Stfld, field);
- cg.Emit(OpCodes.Ret);
-
- return (Action<T, object>)m.CreateDelegate(typeof(Action<T, object>));
- }
-
- throw new ArgumentException("<color=orange>Svelto.ECS</color> unsupported EntityView field (must be an interface and a class)");
- }
- }
- }
|