So, I've come across this a few times, and I'm not sure if this is a "usual"
operation or a formal function/macro in certain languages.

I want to compare two values, but I want to then utilize a third, linked value.

So in the current situation, I'm looking at the dimensions of vectors during a
rotation, and a typical operation is to do something like:
#local MaxX = max(TestValue, MaxX);

But I don't want to keep track of the magnitude of maximum vector - I want to
keep track of the ANGLE of rotation at which that maximum occurs.

Obviously I can concoct some sort of macro to handle this, but it just seemed to
me that this must be a somewhat common task, to the point where such a function
might exist and have a name.

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