I went from the assumption that he just wants something like instance Monad (Todo a) and that implies that b is the type inside of the monad. On 08/16/2016 08:23 PM, David Kraeutmann wrote:
This looks functionally identical to type Todo a b = Either [a] b, and Either has a Monad instance. On 8/16/2016 8:21 PM, Corentin Dupont wrote:
Hi guys, is there some library with a Monad (+Applicative, Functor...) instance of the following type:
data Todo a b = Todo [a] | Done b
Thanks! Corentin
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