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ContentTypes: Add constraints

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GHC 8.0 seems to want these.
This commit is contained in:
Ben Gamari 2016-02-20 13:37:02 +01:00
parent 3467eba44f
commit c6e51260f0
1 changed files with 1 additions and 1 deletions
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servant/src/Servant/API/ContentTypes.hs
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@ -170,7 +170,7 @@ class (AllMime list) => AllCTRender (list :: [*]) a where
handleAcceptH :: Proxy list -> AcceptHeader -> a -> Maybe (ByteString, ByteString)
instance OVERLAPPABLE_
(AllMimeRender (ct ': cts) a) => AllCTRender (ct ': cts) a where
(Accept ct, AllMime cts, AllMimeRender (ct ': cts) a) => AllCTRender (ct ': cts) a where
handleAcceptH _ (AcceptHeader accept) val = M.mapAcceptMedia lkup accept
where pctyps = Proxy :: Proxy (ct ': cts)
amrs = allMimeRender pctyps val