Why does this computation expression builder expect “unit” in my for loop?

和自甴很熟 提交于 2019-12-03 17:21:26

The immediate cause is that your While function constrains the type of body. However, in general you can't use both custom operations and also control flow operators in the same computation expression, so I don't think you'll ever be able to do exactly what you want even if you fix the signature.

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