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Add a known tactic for writing arbitrary instances #695

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merged 9 commits into from
Dec 24, 2020

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isovector
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Christmas comes early for QuickCheck users! This PR adds support for generating arbitrary --- including the tricky business of ensuring termination. It can be run by calling Attempt to fill hole on anything of the form arbitrary :: Gen A for some type A.

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@alanz alanz left a comment

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I love what you are doing, thanks.

I don't see anything obvious, happy for it it merge when CI is green.

@isovector isovector merged commit 0f07efc into haskell:master Dec 24, 2020
@isovector isovector deleted the known-arbitrary branch May 21, 2021 16:42
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