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Make sure to move typeObservers from old to new node when replacing nodes #1783

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merged 2 commits into from
Oct 7, 2024
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Make sure to move typeObservers from old to new node when replacing nodes #1783

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7963422
Make sure to move `typeObservers` from old to new node when replacing…
oxisto Oct 7, 2024
994e4eb
Added doc for typeobservers
oxisto Oct 7, 2024
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6 changes: 6 additions & 0 deletions cpg-core/src/main/kotlin/de/fraunhofer/aisec/cpg/helpers/SubgraphWalker.kt
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Original file line number Diff line number Diff line change
Expand Up @@ -391,6 +391,12 @@ fun SubgraphWalker.ScopedWalker.replace(parent: Node?, old: Expression, new: Exp
new.prevEOG = oldPrevEOG
new.nextEOG = oldNextEOG

// Also move over any type observers
old.typeObservers.forEach {
old.unregisterTypeObserver(it)
new.registerTypeObserver(it)
}

// Make sure to inform the walker about our change
this.registerReplacement(old, new)
}
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