Returning table with CLR

Question

I want to write an CLR procedure which takes a text and returns a table with all the words in this text. But I can\'t figure out how to return a table. Could you please tell me

Answer 1

    [SqlFunction(DataAccess = DataAccessKind.Read, FillRowMethodName = "FillMatches", TableDefinition = "GroupNumber int, MatchText nvarchar(4000)")]
public static IEnumerable Findall(string Pattern, string Input)
{
    List GroupCollection = new List();

    Regex regex = new Regex(Pattern);
    if (regex.Match(Input).Success)
    {
        int i = 0;
        foreach (Match match in regex.Matches(Input))
        {
            GroupCollection.Add(new RegexMatch(i, match.Groups[0].Value));
            i++;
        }
    }
    return GroupCollection;
}

That was a slight alteration from the code by "Damon Drake"
This one does a findall instead of returning the first value found. so

declare @txt varchar(100) = 'Race Stat 2017-2018 -(FINAL)';
select * from dbo.findall('(\d+)', @txt)

returns