/Prelude-v19.0.0/Function/compose.dhall

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Compose two functions into one.

Examples

compose Natural Natural Bool (λ(n : Natural) → n + n) Natural/even 3 ≡ True

Source

--| Compose two functions into one.
let compose
: ∀(a : Type) → ∀(b : Type) → ∀(c : Type) → (a → b) → (b → c) → a → c
= λ(A : Type) →
λ(B : Type) →
λ(C : Type) →
λ(f : AB) →
λ(g : BC) →
λ(x : A) →
g (f x)

let example0 =
assert
: compose Natural Natural Bool (λ(n : Natural) → n + n) Natural/even 3
≡ True

in compose