NTERA/NTERA.Engine/Runtime/Base/Variables.cs

using System;
using System.Collections.Generic;
using System.Reflection;

namespace NTERA.Engine.Runtime.Base
{
	public static class Variables
	{
		public class VariableAttribute : Attribute
		{
			public string Name { get; }
			public ValueType Type { get; }

			public VariableAttribute(string name, ValueType type)
			{
				Name = name;
				Type = type;
			}
		}

		public static Dictionary<VariableAttribute, Func<EraRuntime, int[], Value>> StaticVariables { get; } = _getFunctions();

		private static Dictionary<VariableAttribute, Func<EraRuntime, int[], Value>> _getFunctions()
		{
			var output = new Dictionary<VariableAttribute, Func<EraRuntime, int[], Value>>();

			foreach (MethodInfo method in typeof(Variables).GetMethods(BindingFlags.Public | BindingFlags.Static))
			{
				var variable = method.GetCustomAttribute<VariableAttribute>();

				if (variable != null)
					output[variable] = (Func<EraRuntime, int[], Value>)Delegate.CreateDelegate(typeof(Func<EraRuntime, int[], Value>), method);
			}

			return output;
		}

		[Variable("LINECOUNT", ValueType.Real)]
		public static Value LineCount(EraRuntime runtime, int[] index)
		{
			return runtime.Console.LineCount;
		}
	}
}