44 lines
1.3 KiB
Haskell
44 lines
1.3 KiB
Haskell
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{-# LANGUAGE CPP #-}
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{-# LANGUAGE DeriveDataTypeable #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE MultiParamTypeClasses #-}
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{-# LANGUAGE OverloadedStrings #-}
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#if !MIN_VERSION_base(4,8,0)
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{-# LANGUAGE OverlappingInstances #-}
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#endif
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-- | An @HTML@ empty data type with `MimeRender` instances for @lucid@'s
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-- `ToHtml` class and `Html` datatype.
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-- You should only need to import this module for it's instances and the
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-- `HTML` datatype.:
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--
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-- >>> type Eg = Get '[HTML] a
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--
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-- Will then check that @a@ has a `ToHtml` instance, or is `Html`.
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module Servant.HTML.Lucid where
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import Data.Typeable (Typeable)
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import Lucid (Html, ToHtml (..), renderBS)
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import qualified Network.HTTP.Media as M
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import Servant.API (Accept (..), MimeRender (..))
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data HTML deriving Typeable
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-- | @text/plain;charset=utf-8@
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instance Accept HTML where
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contentType _ = "text" M.// "html" M./: ("charset", "utf-8")
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instance
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#if MIN_VERSION_base(4,8,0)
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{-# OVERLAPPABLE #-}
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#endif
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ToHtml a => MimeRender HTML a where
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mimeRender _ = renderBS . toHtml
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instance
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#if MIN_VERSION_base(4,8,0)
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{-# OVERLAPPING #-}
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#endif
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MimeRender HTML (Html a) where
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mimeRender _ = renderBS
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