Variables::getMemberProperties(): add caching #466
Merged
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Follow up on #332
While parsing the properties of property declarations was reasonably straight forward, with the introduction of union type in PHP 8.0, intersection types in PHP 8.1 and disjunctive normal form types in PHP 8.2, the retrieving of the property type has become more token walking intensive.
With that in mind, caching the results of the function seems prudent.
Includes a dedicated test to verify the cache is used and working.