19 lines
563 B
Haskell
19 lines
563 B
Haskell
module Lang where
|
||
|
||
import Text.Pandoc.Definition
|
||
import Data.Char (toLower)
|
||
import qualified Data.Text as Text
|
||
import System.IO
|
||
|
||
data Lang = Lántas deriving (Eq, Show)
|
||
|
||
type Vars = (?lang :: Maybe Lang)
|
||
|
||
toLang :: Maybe MetaValue -> IO (Maybe Lang)
|
||
toLang (Just (MetaInlines [Str s])) = toLang (Just (MetaString s)) -- ugh
|
||
toLang (Just (MetaString (Text.map toLower -> s)))
|
||
| s == "lántas" || s == "laantas" = pure $ Just Lántas
|
||
toLang Nothing = pure Nothing
|
||
toLang (Just ℓ) = do
|
||
hPutStrLn stderr $ "[WARN] unknown language: " <> show ℓ
|
||
pure Nothing
|