rlp2core

src/Rlp2Core.hs

@@ -0,0 +1,44 @@
+{-# LANGUAGE LambdaCase #-}
+module Rlp2Core
+    ( rlp2core
+    )
+    where
+--------------------------------------------------------------------------------
+import Core.Syntax                  as Core
+import Rlp.Syntax                   as Rlp
+import Data.Foldable
+import Data.HashMap.Strict          qualified as H
+import Control.Monad.State
+import Lens.Micro.Platform
+--------------------------------------------------------------------------------
+
+rlp2core :: RlpProgram' -> Program'
+rlp2core (RlpProgram ds) = execState (decl2core `traverse_` ds) init
+    where
+        init = Program
+            { _programScDefs    = mempty
+            , _programTypeSigs  = mempty
+            }
+
+type GenCoreProg b = State (Program b)
+
+type GenCoreProg' = GenCoreProg Name
+
+emitTypeSig :: Name -> Type -> GenCoreProg' ()
+emitTypeSig b t = do
+    let tl :: Lens' Program' (Maybe Type)
+        tl = programTypeSigs . at b
+    tl <~ (use tl >>= \case
+        -- TODO: non-fatal error
+        Just o  -> error "(TODO: non-fatal) duplicate type sigs"
+        Nothing -> pure (Just t)
+        )
+
+decl2core :: Decl' RlpExpr -> GenCoreProg' ()
+
+decl2core (DataD n as cs) = undefined
+
+decl2core (TySigD vs t) = mkSig `traverse_` vs where
+    mkSig :: VarId -> GenCoreProg' ()
+    mkSig (NameVar n) = emitTypeSig n t
+