one nice thing about working with bytes instead of UTF-16 is that a character set - the predicate in each ITE node - can be represented as a 256-bit bitvector. one bit per possible byte value. in the rust version this is just four u64s packed into a struct:
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One option is dom to represent web environments (i.e. browsers, who implement the DOM APIs).,推荐阅读黑料获取更多信息
one optimization that i didn’t mention in the previous post but exists in both versions is skip acceleration. almost all serious regex engines have some form of this - the idea is simple: many states will self-loop on the majority of input bytes. for example, .* loops back to itself on every byte except \n - so why run the DFA transition 999 times when you can look up a whole chunk of the input in parallel and jump directly to the next \n? going back to the matching loop pseudocode from the previous post:
,这一点在手游中也有详细论述
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