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26 lines
593 B
Idris
26 lines
593 B
Idris
module Data.Fun
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import public Data.Vect
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%default total
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||| Build an n-ary function type from a Vect of Types and a result type
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public export
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Fun : Vect n Type -> Type -> Type
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Fun [] r = r
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Fun (t::ts) r = t -> Fun ts r
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public export
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chain : {ts : Vect n Type} -> Fun [r] r' -> Fun ts r -> Fun ts r'
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chain {ts = []} g r = g r
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chain {ts = (_::_)} g f = \ x => chain g (f x)
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public export
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[Nary] {ts : Vect n Type} -> Functor (Fun ts) where
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map = chain
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||| Returns the co-domain of a n-ary function.
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public export
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target : {ts : Vect n Type} -> {r: Type} -> Fun ts r -> Type
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target _ = r
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