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|
{-# LANGUAGE DeriveGeneric #-}
module Main where
import GHC.Generics
import Coalpit
import Data.Proxy
data FooArgs = FooArgs { arg1 :: Int
, arg2 :: String
} deriving (Generic, Show)
instance ArgParser FooArgs
instance ToArgs FooArgs
instance ArgHelper FooArgs
data FooBar = Foo FooArgs
| Bar
deriving (Generic, Show)
instance ArgParser FooBar
instance ToArgs FooBar
instance ArgHelper FooBar
data Input = Input { something :: Maybe String
, fooBar :: Maybe FooBar
, fooBar2 :: FooBar
} deriving (Generic, Show)
instance ArgParser Input
instance ToArgs Input
instance ArgHelper Input
main :: IO ()
main = do
let val = Input { something = Nothing
, fooBar = Just (Foo FooArgs { arg1 = 1
, arg2 = "a string"})
, fooBar2 = Bar}
args = toArgs defOpt val
print val
print args
print (fromArgs defOpt args :: Either String Input)
data Test = Test { foo :: [Int], bar :: Maybe String }
deriving (Generic, Show)
instance ArgParser Test
instance ToArgs Test
instance ArgHelper Test
help :: IO ()
help = do
mapM_ (\(o, x, y) -> print o >> print x >> putStrLn y) $
[ let opts = defOpt { alwaysUseSelName = ausn
, omitNamedOptions = ono }
in ((ausn, ono), toArgs opts (Test [] vals), argHelper opts [] (Proxy :: Proxy Test))
| ausn <- [True, False]
, ono <- [True, False]
, vals <- [Just "a string", Nothing]]
|
