stgsharp/StgSharp.RegularAnalysis/regex_node_transaction.md

basic

char/charset->char/charset

count

char/charset-match->count increment count increment-loop back->char/charset char/charset-miss match->count end count end-exit->count increment-judge->next node

match group/lookaround

left boarder-> match group start //push stack, add group index -> match logic // recored index -> match group end //pop stack, set group end, build sub sequence