Hi there

I hope you would indulge me in asking for some details about the new
CFrame structure, even in the form of existing literature (e.g. PEP)
where the idea behind it is explained.

Also, I'd like to a quick question, if I may. There now appear to be
two ways of unwinding the frame stack: either iterate over
CFrame.previous, or the more traditional PyFrameObject.f_back. I
suspect there are reasons why these are perhaps not actually
equivalent, and indeed this is mainly what I'd like to read in the
literature I've requested above.

Cheers,
Gabriele

-- 
"Egli è scritto in lingua matematica, e i caratteri son triangoli,
cerchi, ed altre figure
geometriche, senza i quali mezzi è impossibile a intenderne umanamente parola;
senza questi è un aggirarsi vanamente per un oscuro laberinto."

-- G. Galilei, Il saggiatore.
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