using System;
using System.Collections.Generic;
using System.Globalization;
using System.Runtime.InteropServices.ComTypes;
using System.Text;

namespace ln.parse.tokenizer
{
    public abstract class TokenMatcher
    {

        public TokenMatcher()
        {
        }

        public abstract bool Match(SourceBuffer sourceBuffer, out Token token);

        public static readonly TokenMatcher INTEGER = new RegularExpressionMatcher("^-?\\d+", (SourceBuffer sourceBuffer, int start, int length) => new Token.IntegerToken(sourceBuffer, start, length));
        public static readonly TokenMatcher FLOAT = new RegularExpressionMatcher("^-?\\d+\\.\\d*", (SourceBuffer sourceBuffer, int start, int length) => new Token.FloatToken(sourceBuffer, start, length));
        public static readonly TokenMatcher STRING = new RegularExpressionMatcher("^\\\"(\\\\\"|.)*?\\\"", (SourceBuffer sourceBuffer, int start, int length) => new Token.StringToken(sourceBuffer, start, length));
        public static readonly TokenMatcher IDENTIFIER = new RegularExpressionMatcher("^\\w][a-zA-Z0-9_]*", (SourceBuffer sourceBuffer, int start, int length) => new Token.IdentifierToken(sourceBuffer, start, length));
        public static readonly TokenMatcher OPERATOR = new RegularExpressionMatcher("\\+|\\-|\\*|\\/|\\||\\&|\\|\\||\\&\\&", (SourceBuffer sourceBuffer, int start, int length) => new Token.OperatorToken(sourceBuffer, start, length));
        public static readonly TokenMatcher WHITESPACE = new RegularExpressionMatcher("^\\s+", (SourceBuffer sourceBuffer, int start, int length) => new Token.WhiteSpaceToken(sourceBuffer, start, length));
        public static readonly TokenMatcher BRACKET = new RegularExpressionMatcher("^\\{|\\}|\\(|\\)|\\[|\\]|", (SourceBuffer sourceBuffer, int start, int length) => new Token.WhiteSpaceToken(sourceBuffer, start, length));

    }

}