TokenDefinition.cs

using System.Text.RegularExpressions;

namespace PangLib.Scripting;

public class TokenDefinition<T> where T : new()
{
    private Regex Regex;
    private readonly T ReturnToken;
        
    public TokenDefinition(T returnToken, string regexPattern)
    {
        Regex = new Regex(regexPattern, RegexOptions.IgnoreCase);
        ReturnToken = returnToken;
    }
        
    public TokenMatch<T> Match(string inputString)
    {
        var match = Regex.Match(inputString);
        if (match.Success)
        {
            string remainingText = string.Empty;
            if (match.Length != inputString.Length)
                remainingText = inputString.Substring(match.Length);

            return new TokenMatch<T>
            {
                IsMatch = true,
                RemainingText = remainingText,
                TokenType = ReturnToken,
                Value = match.Value
            };
        }
            
        return new TokenMatch<T> { IsMatch = false};
    }
}