Feature match test counts: 32 '*' zero-or-more matcher 27 () parenthetized group 48 []-enclosed character-class matcher 7 '.' single-character matcher 29 |-separated logical alternatives 16 '?' optional matcher 29 '+' one-or-more matcher Feature non-match test counts: 45 '+' one-or-more matcher 24 '*' zero-or-more matcher 31 () parenthetized group 49 []-enclosed character-class matcher 6 '.' single-character matcher 32 |-separated logical alternatives 21 '?' optional matcher

{lo,hi} : occurrence-count matcher ~p{} : Unicode property matcher ~P{} : Unicode property-complement matcher [^] : complementary character-class matcher

Regexp Lessons

I’m just landing a chonky PR in Quamina whose effect is to enable the + and * regexp features. As in my last chapter, this is a disorderly war story not an essay, and probably not of general interest. But as I said then, the people who care about coercing finite automata into doing useful things at scale are My People (there are dozens of us).

+

*

2014-2026 · As I write this, I’m sitting in the same couch in my Mom’s living room in Saskatchewan where, on my first Christmas after joining AWS, I got the first-ever iteration