CodeQL library for Python
codeql/python-all 2.1.1-dev (changelog, source)
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Predicate Make::tupleDeltaBackwards

Holds if there exists a transition from r to q in the product automaton. Notice that the arguments are flipped, and thus the direction is backwards.

Import path

import codeql.regex.nfa.SuperlinearBackTracking
predicate tupleDeltaBackwards(StateTuple q, StateTuple r)