FunctionDeclarations::getParameters(): add caching #377
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Follow up on #332
While most function declarations will be quite straight-forward, for function declarations with lots of parameters, this method can be token walking intensive.
As this method is also used by the
Operators::isReference()
method and in the future potentially by yet another method, caching the results of the function seems prudent.Includes a dedicated test to verify the cache is used and working.