[mercury-users] Tuple type class instances

Michael Day mikeday at corplink.com.au
Wed Jun 20 11:01:55 AEST 2001


Hi,

Is it or will it ever be possible to declare a type class instance that
applies to all tuples?

I seem to recall this syntax...

:- instance something({A | B}) ...

where A is the first element of the tuple and B is the n-1 size remaining
tuple.

Michael



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