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Add migration guide for hoistClientMonad

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Oleg Grenrus 2018-06-12 22:05:06 +03:00
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servant/CHANGELOG.md
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@ -41,6 +41,14 @@
Read [tutorial section for more information](https://haskell-servant.readthedocs.io/en/release-0.14/tutorial/Client.html#changing-the-monad-the-client-functions-live-in).
([#936](https://github.com/haskell-servant/servant/pull/936))
iF you have own combinators, you'll need to define a new method of
`HasClient` class, for example:
```haskell
type Client m (MyCombinator :> api) = MyValue :> Client m api
hoistClientMonad pm _ nt cl = hoistClientMonad pm (Proxy :: Proxy api) nt . cl
```
- *servant* Add `safeLink' :: (Link -> a) -> ... -> MkLink endpoint a`,
which allows to create helpers returning something else than `Link`.
([#968](https://github.com/haskell-servant/servant/pull/968))