C++: Fix flow out of this
by reference
#1900
Merged
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This PR adds a type of post-update node that allows data flow out of a
this
pointer passed by reference. This was missing because there is noVariableAccess
associated with it, and so it didn't fit intoDefinitionByReferenceNode
.There's a false negative in one of the tests I'm adding. This will be fixed by #1884.
I tested performance on MySQL, and it was fine.