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Enable FlexibleContexts in Servant.API.ContentTypes 

Starting with GHC 9.2, UndecidableInstances no longer implies FlexibleContexts.
Add this extension where it's needed to make compilation succeed.
This commit is contained in:
Joseph C. Sible 2021-10-30 23:26:21 -04:00
parent bd9e4b1090
commit fea40bd0fc
2 changed files with 10 additions and 0 deletions
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changelog.d/1477 Normal file
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synopsis: Enable FlexibleContexts in Servant.API.ContentTypes
prs: #1477
description: {
Starting with GHC 9.2, UndecidableInstances no longer implies FlexibleContexts.
Add this extension where it's needed to make compilation succeed.
}

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servant/src/Servant/API/ContentTypes.hs
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@ -2,6 +2,7 @@
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE DeriveDataTypeable #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE OverloadedStrings #-}