Token.cs

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using System;

namespace Mercury.Scanning
{

//==<<  TokenType  >>==========================================================

    public enum TokenType
    {
        String,
        Symbol,
        Keyword,
        Number   
    }

//=============================================================================
//  Token
//=============================================================================

    public class Token : IEquatable<Token>
    {
        //--[  Constructors  ]-------------------------------------------------

        public Token(string value, TokenType type, int position, bool quoted = false)
        {
            if (value == null) throw new ArgumentNullException("value");

            Value    = value;
            Type     = type;
            Position = position;
            Quoted   = quoted;
        }

        //--[  Properties  ]---------------------------------------------------

        public string Value { get; private set; }

        public TokenType Type { get; private set; }

        public int Position { get; private set; }

        public bool Quoted { get; private set; }

        //--[  Overriden methods  ]--------------------------------------------

        #region [  Object      ]

        public override bool Equals(object obj)
        {
            Token other = obj as Token;
            return other == null ? false : Equals(other);
        }

        public override int GetHashCode()
        { return Value.GetHashCode(); }

        public override string ToString()
        { return string.Format(Quoted ? "{0}\t <{1}>\t [\"{2}\"]" : "{0}\t <{1}>\t [{2}]", Position, Type, Value); }

        #endregion

        //--[  Interface implementation  ]-------------------------------------

        #region [  IEquatable  ]

        public bool Equals(Token other)
        {
            return (other    != null          ) && (Type  == other.Type )
                && (Position == other.Position) && (Value == other.Value);
        }

        #endregion

    }
}