Did you mean this link for the Users Guide?
https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/deriving.html#derive-any-class

DeriveAny class lets you write

> data Foo = ... deriving (Bar)

instead of:

> data Foo = ...
> instance Bar Foo

(i.e. if it's possible to make it an instance without having to
provide explicit method implementations); as the Users Guide hints
it's primarily useful in cases where default definitions are provided
for you, typically using the DefaultSignatures definition with
GHC.Generics.

On 6 November 2015 at 20:01, Kostiantyn Rybnikov <k-bx@k-bx.com> wrote:
> Is there a topic for DeriveAnyClass extension in user guide? It is mentioned
> several times in different places, also I see link to it in from cabal
> haddocs [0] into its page inside "other type extensions" [1], but it leads
> nowhere.
>
> Thank you.
>
> [0]:
> https://www.haskell.org/cabal/release/cabal-latest/doc/API/Cabal/Language-Haskell-Extension.html
> [1]:
> https://downloads.haskell.org/~ghc/latest/docs/html/users_guide/other-type-extensions.html#derive-any-class
>

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Ivan Lazar Miljenovic
Ivan.Miljenovic@gmail.com
http://IvanMiljenovic.wordpress.com