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implementation module TupleOverloading
import StdEnv
instance + (a,b) | + a & + b where
instance + (a,b,c) | + a & + b & + c where
instance - (a,b) | - a & - b where
instance - (a,b,c) | - a & - b & - c where
instance * (a,b) | * a & * b where
instance * (a,b,c) | * a & * b & * c where
instance / (a,b) | / a & / b where
instance / (a,b,c) | / a & / b & / c where
instance zero (a,b) | zero a & zero b where
instance zero (a,b,c) | zero a & zero b & zero c where
instance one (a,b) | one a & one b where
instance one (a,b,c) | one a & one b & one c where
instance ~ (a,b) | ~ a & ~ b where
instance ~ (a,b,c) | ~ a & ~ b & ~ c where
Start = (test (1,2), test (1,2,3))
test a = ( zero + a == a && a == a + zero
, a - zero == a && a == ~ (zero - a)
, one * a == a && a == a * one
, zero * a == zero && zero == a * zero
, a / one == a
, ~ (~ a) == a
)
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