Re: [Haskell-cafe] Help with TH trick

That doesn't work out so well when the class has a bunch of methods. I definitely saw the nice way on Hackage ... somewhere. On Sat, Oct 22, 2022, 2:49 PM Brandon Allbery wrote:

I'm not aware of anything specifically like that, but the `make…` functions in https://hackage.haskell.org/package/deriving-compat-0.6.1/docs/Data-Deriving... may allow you to do something similar?

On Sat, Oct 22, 2022 at 2:32 PM David Feuer wrote:

...

I remember seeing a package that offered a function used something like

this:

...

$(deriveThingy [d| instance Foo a => Thingy a |])

to allow the user to specify the constraint(s) for a generated instance.

I'd love to borrow the code for that, but I can't remember what package it was in, what class it derived, etc. Can anyone help?

...

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-- brandon s allbery kf8nh allbery.b@gmail.com