Rubberduck.Parsing.Preprocessing.LikeExpression.TranslateToNETRegex C# (CSharp) Method

TranslateToNETRegex() private method

private TranslateToNETRegex ( VBALikeParser likePattern ) : string
likePattern VBALikeParser
return string
        private string TranslateToNETRegex(VBALikeParser.LikePatternStringContext likePattern)
        {
            StringBuilder regexStr = new StringBuilder();
            foreach (var element in likePattern.likePatternElement())
            {
                if (element.likePatternChar() != null)
                {
                    regexStr.Append(element.likePatternChar().GetText());
                }
                else if (element.QUESTIONMARK() != null)
                {
                    regexStr.Append(".");
                }
                else if (element.HASH() != null)
                {
                    regexStr.Append(@"\d");
                }
                else if (element.STAR() != null)
                {
                    regexStr.Append(@".*?");
                }
                else
                {
                    var charlist = element.likePatternCharlist().GetText();
                    if (charlist.StartsWith("[!"))
                    {
                        charlist = "[^" + charlist.Substring(2);
                    }
                    regexStr.Append(charlist);
                }
            }
            // Full string match, e.g. "abcd" should NOT match "a.c"
            var regex = "^" + regexStr.ToString() + "$";
            return regex;
        }
    }