CodeQL library for Python
codeql/python-all 0.9.1 ( changelog , source )
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Member predicate SsaSourceVariable :: hasRefinementEdge

Holds if the edge pred->succ defines an ESSA variable for this variable in such a way that the new variable is a refinement in some way of the variable used at use.

predicate hasRefinementEdge ( ControlFlowNode use , BasicBlock pred , BasicBlock succ )