15 lines
450 B
Text
15 lines
450 B
Text
/-
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Copyright (c) Luke Nelson and Jared Roesch. All rights reserved.
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Released under Apache 2.0 license as described in the file LICENSE.
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Authors: Luke Nelson and Jared Roesch
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-/
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prelude
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structure [class] functor (f : Type → Type) : Type :=
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(map : Π {a b: Type}, (a → b) → f a → f b)
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attribute [inline]
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definition fmap {F : Type → Type} [functor F] {A B : Type} (f : A → B) (a : F A) : F B :=
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functor.map f a
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infixr ` <$> `:100 := fmap
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