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foldRecM #98

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matthewleon opened this issue Feb 10, 2018 · 3 comments
Open

foldRecM #98

matthewleon opened this issue Feb 10, 2018 · 3 comments
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status: blocked This issue or PR is blocked by something and cannot make progress. type: enhancement A new feature or addition.

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@matthewleon
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Generalize from Data.Array:

foldRecM :: forall m a b. Foldable f => MonadRec m => (a -> b -> m a) -> a -> f b -> m a
@matthewleon
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Sadly, it seems that any generalized version of this will be hopelessly inefficient, repeatedly running a left fold over the collection.

@matthewleon
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This should eventually be doable in a reasonable once (if?) default member implementations are part of the language, so leaving it up for now.

@JordanMartinez JordanMartinez added status: blocked This issue or PR is blocked by something and cannot make progress. type: enhancement A new feature or addition. labels Dec 4, 2021
@jamesdbrock
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I want this too.

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@matthewleon @jamesdbrock @JordanMartinez