1 files changed, 236 insertions, 0 deletions

diff --git a/Language.hs b/Language.hs
new file mode 100644
index 0000000..ae38916
--- /dev/null
+++ b/Language.hs
@@ -0,0 +1,236 @@
+{-# LANGUAGE RankNTypes, OverloadedStrings, DeriveGeneric, LambdaCase #-}
+module Language where
+
+import GHC.Generics
+import Data.Aeson (ToJSON(..),FromJSON(..))
+import Control.Monad.Writer
+import Data.String
+import Data.List
+
+instance IsString Type where
+  fromString a = Data a
+
+data DataDef
+  = DataDef
+  { dataName      :: String
+  , constructors  :: [ConstructorDef]
+  }
+  | TypeAlias
+  { aliasName     :: String
+  , aliasType     :: Type
+  }
+  deriving (Show,Generic)
+
+data ConstructorDef
+  = ConstructorDef
+  { name          :: String
+  , fields        :: [Field]
+  }
+  deriving (Show,Generic)
+
+data Field
+  = Field
+  { fieldName :: String
+  , fieldType :: Type
+  }
+  deriving (Show,Generic)
+
+data Type
+  = Int
+  | Int32
+  | Word
+  | Word32
+  | Float
+  | Bool
+  | String
+  | V2 Type
+  | V3 Type
+  | V4 Type
+  -- higher order types
+  | Array Type
+  | List Type
+  | Tuple [Type]
+  | Maybe Type
+  | Map Type Type
+  -- user defined
+  | Data String
+  deriving (Show,Generic)
+
+parens :: String -> String
+parens a
+  | 1 == length (words a) = a
+  | otherwise = "(" ++ a ++ ")"
+
+psType :: Type -> String
+psType = \case
+  Int     -> "Int"
+  Int32   -> "Int32"
+  Word    -> "Word"
+  Word32  -> "Word32"
+  Float   -> "Float"
+  Bool    -> "Bool"
+  String  -> "String"
+
+  V2 Int        -> "V2I"
+  V2 Word       -> "V2U"
+  V2 Float      -> "V2F"
+  V2 Bool       -> "V2B"
+  V2 (V2 Float) -> "M22F"
+  V2 (V3 Float) -> "M32F"
+  V2 (V4 Float) -> "M42F"
+
+  V3 Int        -> "V3I"
+  V3 Word       -> "V3U"
+  V3 Float      -> "V3F"
+  V3 Bool       -> "V3B"
+  V3 (V2 Float) -> "M23F"
+  V3 (V3 Float) -> "M33F"
+  V3 (V4 Float) -> "M43F"
+
+  V4 Int        -> "V4I"
+  V4 Word       -> "V4U"
+  V4 Float      -> "V4F"
+  V4 Bool       -> "V4B"
+  V4 (V2 Float) -> "M24F"
+  V4 (V3 Float) -> "M34F"
+  V4 (V4 Float) -> "M44F"
+
+  Array t       -> "Array " ++ parens (hsType t)
+  List t        -> "List " ++ parens (hsType t)
+  Tuple l       -> "(" ++ intercalate "," (map hsType l) ++ ")"
+  Maybe t       -> "Maybe " ++ parens (hsType t)
+  Map String v  -> "StrMap " ++ parens (hsType v)
+  Map k v       -> "Map " ++ parens (hsType k) ++ " " ++ parens (hsType v)
+  -- user defined
+  Data t        -> t
+  x -> error $ "unknown type: " ++ show x
+
+hsType :: Type -> String
+hsType = \case
+  Int     -> "Int"
+  Int32   -> "Int32"
+  Word    -> "Word"
+  Word32  -> "Word32"
+  Float   -> "Float"
+  Bool    -> "Bool"
+  String  -> "String"
+
+  V2 Int        -> "V2I"
+  V2 Word       -> "V2U"
+  V2 Float      -> "V2F"
+  V2 Bool       -> "V2B"
+  V2 (V2 Float) -> "M22F"
+  V2 (V3 Float) -> "M32F"
+  V2 (V4 Float) -> "M42F"
+
+  V3 Int        -> "V3I"
+  V3 Word       -> "V3U"
+  V3 Float      -> "V3F"
+  V3 Bool       -> "V3B"
+  V3 (V2 Float) -> "M23F"
+  V3 (V3 Float) -> "M33F"
+  V3 (V4 Float) -> "M43F"
+
+  V4 Int        -> "V4I"
+  V4 Word       -> "V4U"
+  V4 Float      -> "V4F"
+  V4 Bool       -> "V4B"
+  V4 (V2 Float) -> "M24F"
+  V4 (V3 Float) -> "M34F"
+  V4 (V4 Float) -> "M44F"
+
+  Array t       -> "[" ++ hsType t ++ "]"
+  List t        -> "[" ++ hsType t ++ "]"
+  Tuple l       -> "(" ++ intercalate "," (map hsType l) ++ ")"
+  Maybe t       -> "Maybe " ++ parens (hsType t)
+  Map k v       -> "Map " ++ parens (hsType k) ++ " " ++ parens (hsType v)
+  -- user defined
+  Data t        -> t
+  x -> error $ "unknown type: " ++ show x
+
+hasFieldNames :: [Field] -> Bool
+hasFieldNames [] = False
+hasFieldNames l = all (not . null . fieldName) l
+
+constType :: DataDef -> String
+constType = head . words . show
+
+instance ToJSON ConstructorDef
+instance ToJSON DataDef
+instance ToJSON Field
+instance ToJSON Type
+
+instance FromJSON ConstructorDef
+instance FromJSON DataDef
+instance FromJSON Field
+instance FromJSON Type
+
+type DDef = Writer [DataDef]
+type CDef = Writer [ConstructorDef]
+
+data_ :: forall a . String -> CDef () -> DDef ()
+data_ n l = tell [DataDef n $ execWriter l]
+
+alias_ :: String -> Type -> DDef ()
+alias_ n t = tell [TypeAlias n t]
+
+a #= b = alias_ a b
+
+class IsField a where
+  toField :: a -> Field
+
+instance IsField Field where
+  toField a = a
+
+instance IsField Type where
+  toField a = Field "" a
+
+const_ :: String -> [Type] -> CDef ()
+const_ n t = tell [ConstructorDef n [Field a b | Field a b <- map toField t]]
+
+constR_ :: String -> [Field] -> CDef ()
+constR_ n t = tell [ConstructorDef n [Field a b | Field a b <- map toField t]]
+
+enum_ :: String -> CDef ()
+enum_ n = tell [ConstructorDef n []]
+
+v2b = V2 Bool
+v3b = V3 Bool
+v4b = V4 Bool
+v2u = V2 Word
+v3u = V3 Word
+v4u = V4 Word
+v2i = V2 Int
+v3i = V3 Int
+v4i = V4 Int
+v2f = V2 Float
+v3f = V3 Float
+v4f = V4 Float
+m22 = V2 v2f
+m23 = V3 v2f
+m24 = V4 v2f
+m32 = V2 v3f
+m33 = V3 v3f
+m34 = V4 v3f
+m42 = V2 v4f
+m43 = V3 v4f
+m44 = V4 v4f
+
+(#::) :: String -> Type -> Field
+a #:: b = Field a b
+
+{-
+  definitions:
+    ADT
+    Record
+    Vector
+
+  instances:
+    Show
+    Eq
+    Ord
+
+  serialization:
+    json: encode/decode
+    other?
+-}
\ No newline at end of file