On 5/16/2020 4:48 PM, Keith McKay wrote:
> Answering my own problem here.
>
> I've just searched through the mailing list archives and it seems that
> if I add [instance=doublefun] I do not get the Arithmetic Overflow
> error. Joy!
fwiw, we have also instance=decimalfun

concerning arithmic:

in metapost we have

scaled  : upto 4K bp
double  : 64 bit floats
decimal : configurable accuracy
complex : dual doubles (only in luametafun)

in lmtx lua we have:

integer  : lua tries to be clever but mixing leads to double
float    : lua tries to be clever
decimal  : userdata arbitrary precision (only in lmtx)
complex  : userdata dual doubles (only in lmtx)

(in lmtx we have an extended math library and these function are also
available in luametafun)

Hans

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