SyntaxException.cs

using System;
 
namespace Waher.Script.Exceptions
{
    public class SyntaxException : ScriptException 
    {
        private readonly string script;
        private readonly int position;
 
        public SyntaxException(string Message, int Position, string Script)
            : base(Append(Message, Position, Script))
        {
            this.position = Position;
            this.script = Script;
        }
 
        public SyntaxException(string Message, int Position, string Script, Exception InnerException)
            : base(Append(Message, Position, Script), InnerException)
        {
            this.position = Position;
            this.script = Script;
        }
 
        private static string Append(string Message, int Position, string Script)
        {
            Message += "\r\n\r\n";
 
            int Start = Math.Max(0, Position - 100);
            int End = Math.Min(Script.Length, Position + 100);
 
            Message += Script.Substring(Start, Position - Start) + "^-------------" + Script.Substring(Position, End - Position);
 
            return Message;
        }
 
        public int Position => this.position;
 
        public string Script => this.script;
 
    }
}