The »op •« is infamous. Whatever you wish instead (my personal favorite being no special syntax at all), problems include a) to detect unintended printing behaviour b) a suitable migration mechanisms
Concerning b), one you could imagine things like
a) alternative declarations (infix(l/r)_new beside infix(l/r),
infix(l/r) beside infix(l/r)_old)
b) a flag to control the semantics of infix(l/r)
c) a flag combined with a data slot to modify existing mixfix
declarations afterwards also
Personally I would appreciate some move here, but this only makes sense
if we agree what the goal is and whether it is worth the effort.
Cheers,
Florian
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