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Why EitherT is not covariant for the input types as Either from scala #2538
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ceedubs
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Every once in a while [people](typelevel/cats#556) [ask](typelevel/cats#2310) [about](typelevel/cats#2538) this. I thought that it would be nice to provide a more detailed answer in a single place so we can link to it from the Cats FAQ. Note: I had to add the `-Ypartial-unification` flag for one of the code samples to compile. It's quite possible that I should be doing this a different way than I did.
ceedubs
added a commit
to ceedubs/typelevel.github.com
that referenced
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Sep 30, 2018
Every once in a while [people](typelevel/cats#556) [ask](typelevel/cats#2310) [about](typelevel/cats#2538) this. I thought that it would be nice to provide a more detailed answer in a single place so we can link to it from the Cats FAQ. Note: I had to add the `-Ypartial-unification` flag for one of the code samples to compile. It's quite possible that I should be doing this a different way than I did.
I've submitted typelevel/typelevel.github.com#233 and if it gets merged we can point to the blog post in the Cats FAQ. |
Thanks, @ceedubs ! |
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