I am pretty late here but I’d advise against regexes unless they are very straightforward. Haven’t looked into yours in details (and length is not always an indicator of a complex regex) but I’d probably reach for nimble_parsec and give it a go for a day or two.
That being said, being productive in that particular library is a skill in and of itself so if you are pressed for time you should probably keep your regex solution but also add edge case unit tests.
