Names.cs

using System;
using System.Reflection;
using Waher.Script.Abstraction.Elements;
using Waher.Script.Exceptions;
using Waher.Script.Model;
using Waher.Script.Objects;
using Waher.Script.Objects.VectorSpaces;
 
namespace Waher.Script.Functions.Runtime
{
    public class Names : FunctionOneVariable
    {
        public Names(ScriptNode Argument, int Start, int Length, Expression Expression)
            : base(Argument, Start, Length, Expression)
        {
        }
 
        public override string FunctionName => nameof(Names);
 
        public override IElement Evaluate(IElement Argument, Variables Variables)
        {
            Type T;
 
            if (Argument is TypeValue TypeValue)
                T = TypeValue.Value;
            else
                T = Argument.AssociatedObjectValue?.GetType() ?? typeof(object);
 
            if (!T.GetTypeInfo().IsEnum)
                throw new ScriptRuntimeException("Argument is not an enumeration type of value.", this);
 
            return new ObjectVector(Enum.GetNames(T));
        }
    }
}