Allow some manual testing at the very least

1 files changed, 38 insertions, 0 deletions

diff --git a/test/Main.hs b/test/Main.hs
new file mode 100644
index 0000000..19f56e2
--- /dev/null
+++ b/test/Main.hs
@@ -0,0 +1,38 @@
+{-# LANGUAGE DataKinds #-}
+{-# LANGUAGE GADTs #-}
+{-# LANGUAGE LambdaCase #-}
+{-# LANGUAGE StandaloneDeriving #-}
+{-# LANGUAGE TypeApplications #-}
+{-# LANGUAGE TypeFamilies #-}
+module Main where
+
+import qualified Data.Dependent.EnumMap.Strict as DE
+import Data.Dependent.Sum
+import Data.Some
+
+
+data Tag = A | B | C
+  deriving (Show)
+
+data STag tag where
+  SA :: STag A
+  SB :: STag B
+  SC :: STag C
+deriving instance Show (STag tag)
+
+instance DE.Enum1 STag where
+  type Enum1Info STag = ()
+  fromEnum1 = \case { SA -> (0, ()); SB -> (1, ()); SC -> (2, ()) }
+  toEnum1 n () = case n of { 0 -> Some SA; 1 -> Some SB; 2 -> Some SC; _ -> error "invalid tag" }
+
+data Value tag where
+  VA :: Int -> Value A
+  VB :: Bool -> Value B
+  VC :: String -> Value c
+deriving instance Show (Value tag)
+
+
+main :: IO ()
+main = do
+  print $ DE.fromList @STag @Value []
+  print $ DE.fromList [SB :=> VB False, SA :=> VA 3]