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Proposed laws for Bifunctor #557

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agenovese opened this issue Oct 4, 2015 · 2 comments
Closed

Proposed laws for Bifunctor #557

agenovese opened this issue Oct 4, 2015 · 2 comments

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@agenovese
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Currently there are no laws associated with Bifunctor, I'd like to propose the following:

Bifunctor Identity:

fa.bimap(identity, identity) <-> fa

Bifunctor Composition

fa.bimap(f1, f2).bimap(g1, g2) <-> fa.bimap(f1 andThen g1, f2 andThen g2)
@agenovese agenovese mentioned this issue Oct 4, 2015
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@fthomas
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fthomas commented Oct 4, 2015

See also #509. It is also good practice to add a comment here if you're working on this.

@fthomas fthomas mentioned this issue Oct 4, 2015
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@fthomas
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fthomas commented Oct 4, 2015

Fixed by #559

@fthomas fthomas closed this as completed Oct 4, 2015
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@fthomas @agenovese