_Core/Lang/Parser/LexerBase.cs

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


namespace ComLib.Lang
{
    /// <summary>
    /// Base class for the language lexer... this does not know anything about tokens.
    /// This class only has methods to readchars, peekchars, read words, numbers etc.
    /// </summary>
    public class LexerBase
    {
        /// <summary>
        /// Stores the lexical position
        /// </summary>
        public class LexerState
        {
            /// <summary>
            /// Current position in text.
            /// </summary>
            public int Pos;


            /// <summary>
            /// Line number
            /// </summary>
            public int Line;


            /// <summary>
            /// Line char position.
            /// </summary>
            public int LineCharPosition;


            /// <summary>
            /// The source code.
            /// </summary>
            public string Text;


            /// <summary>
            /// The current char
            /// </summary>
            public char CurrentChar;


            /// <summary>
            /// The next char.
            /// </summary>
            public char NextChar;
        }


        /// <summary>
        /// Single quote
        /// </summary>
        protected const char SQUOTE = '\'';