NTERA/NTERA.Engine/Runtime/DynamicVariable.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace NTERA.Engine.Runtime
{
	public class DynamicVariable : Variable
	{
		protected EraRuntime Runtime { get; }
		protected Func<EraRuntime, int[], Value> Predicate { get; }

		public DynamicVariable(string name, ValueType type, EraRuntime runtime, Func<EraRuntime, int[], Value> predicate) : base(name, type)
		{
			Runtime = runtime;
			Predicate = predicate;
		}

		public override Value this[params int[] index]
		{
			get => Predicate(Runtime, index);
			set => throw new EraRuntimeException("Cannot assign to a dynamic variable");
		}
	}
}