SE-0357: Regex String Processing Algorithms

[ole (Ole Begemann)]

@benrimmington

Why does the consuming method of the CustomConsumingRegexComponent protocol have both index and bounds parameters?

@Michael_Ilseman talked about this in the pitch thread: [Pitch] Regex-powered string processing algorithms - #7 by Michael_Ilseman

What's the difference between index and bounds.lowerBound here?

Regexes include lookaround assertions, which might look before or after the current search point. Additionally, some anchors will actually try to look at the surrounding context outside of the searched range, though there are modes and options to tweak this.