README.md

@@ -57,9 +57,8 @@ Listed in order of importance.
         - [x] Garbage Collection
     - [ ] Emitter
         - [ ] Code-gen (target yet to be decided)
-        - [ ] Core language emitter
-    - [ ] Core linter (Type-checker)
-    - [ ] Core2Core pass
+    - [x] Core linter (Type-checker)
+    - [ ] Core2Core pass (optimisations and misc. preprocessing)
         - [x] GM prep
             - [x] Non-strict case-floating
         - [ ] Let-floating
@@ -101,9 +100,10 @@ Listed in order of importance.
 ### January Release Plan
 - [ ] Beta rl' to Core
 - [ ] UX improvements
-    - [ ] Actual compiler errors -- no more unexceptional `error` calls
-    - [ ] Better CLI dump flags
-    - [ ] Annotate the AST with token positions for errors
+    - [x] Actual compiler errors -- no more unexceptional `error` calls
+    - [x] Better CLI dump flags
+    - [ ] Annotate the AST with token positions for errors (NOTE: As of Feb. 1,
+      this has been done, but the locational info is not yet used in error messages)
 - [ ] More examples
 
 ### March Release Plan

app/Main.hs

@@ -68,6 +68,8 @@ options = RLPCOptions
     <*> option languageReader
         (  long "language"
         <> short 'x'
+        <> metavar "rlp|core"
+        <> help "the language to be compiled -- see README"
         )
     <*> some (argument str $ metavar "FILES...")
     where

rlp.cabal

@@ -43,6 +43,7 @@ library
                     , Core.Parse
                     , Core.Lex
                     , Core2Core
+                    , Rlp2Core
                     , Control.Monad.Utils
 
     build-tool-depends: happy:happy, alex:alex

src/Rlp/Parse/Types.hs

@@ -52,7 +52,7 @@ import Compiler.Types
 
 data RlpcPs
 
-type instance XRec RlpcPs f = Located (f RlpcPs)
+type instance XRec RlpcPs a = Located a
 type instance IdP RlpcPs = PsName
 
 type instance XFunD RlpcPs = ()

src/Rlp/Syntax.hs

@@ -8,6 +8,7 @@ module Rlp.Syntax
     (
     -- * AST
       RlpProgram(..)
+    , progDecls
     , Decl(..), Decl', RlpExpr(..), RlpExpr'
     , Pat(..), Pat'
     , Assoc(..)
@@ -53,15 +54,20 @@ data RlpModule p = RlpModule
 
 -- | dear god.
 type PhaseShow p =
-    ( Show (XRec p Pat), Show (XRec p RlpExpr)
-    , Show (XRec p Lit), Show (IdP p)
-    , Show (XRec p RlpType)
-    , Show (XRec p Binding)
+    ( Show (XRec p (Pat p)), Show (XRec p (RlpExpr p))
+    , Show (XRec p (Lit p)), Show (IdP p)
+    , Show (XRec p (RlpType p))
+    , Show (XRec p (Binding p))
     )
 
 newtype RlpProgram p = RlpProgram [Decl' p]
 
-deriving instance (PhaseShow p, Show (XRec p Decl)) => Show (RlpProgram p)
+progDecls :: Lens' (RlpProgram p) [Decl' p]
+progDecls = lens
+    (\ (RlpProgram ds) -> ds)
+    (const RlpProgram)
+
+deriving instance (PhaseShow p, Show (XRec p (Decl p))) => Show (RlpProgram p)
 
 data RlpType p = FunConT
                | FunT (RlpType' p) (RlpType' p)
@@ -69,7 +75,7 @@ data RlpType p = FunConT
                | VarT (IdP p)
                | ConT (IdP p)
 
-type RlpType' p = XRec p RlpType
+type RlpType' p = XRec p (RlpType p)
 
 deriving instance (PhaseShow p)
                   => Show (RlpType p)
@@ -95,11 +101,11 @@ type family XInfixD p
 type family XXDeclD p
 
 pattern FunD   :: (XFunD p ~ ())
-               => (IdP p) -> [Pat' p] -> (RlpExpr' p) -> (Maybe (Where p))
+               => IdP p -> [Pat' p] -> RlpExpr' p -> Maybe (Where p)
                -> Decl p
-pattern TySigD :: (XTySigD p ~ ()) => [IdP p] -> (RlpType' p) -> Decl p
-pattern DataD  :: (XDataD p ~ ()) => (IdP p) -> [IdP p] -> [ConAlt p] -> Decl p
-pattern InfixD :: (XInfixD p ~ ()) => Assoc -> Int -> (IdP p) -> Decl p
+pattern TySigD :: (XTySigD p ~ ()) => [IdP p] -> RlpType' p -> Decl p
+pattern DataD  :: (XDataD p ~ ()) => IdP p -> [IdP p] -> [ConAlt p] -> Decl p
+pattern InfixD :: (XInfixD p ~ ()) => Assoc -> Int -> IdP p -> Decl p
 pattern XDeclD :: (XXDeclD p ~ ()) => Decl p
 
 pattern FunD n as e wh = FunD' () n as e wh
@@ -108,7 +114,7 @@ pattern DataD n as cs = DataD' () n as cs
 pattern InfixD a p n = InfixD' () a p n
 pattern XDeclD = XDeclD' ()
 
-type Decl' p = XRec p Decl
+type Decl' p = XRec p (Decl p)
 
 data Assoc = InfixL
            | InfixR
@@ -117,7 +123,7 @@ data Assoc = InfixL
 
 data ConAlt p = ConAlt (IdP p) [RlpType' p]
 
-deriving instance (Show (IdP p), Show (XRec p RlpType)) => Show (ConAlt p)
+deriving instance (Show (IdP p), Show (XRec p (RlpType p))) => Show (ConAlt p)
 
 data RlpExpr p = LetE'  (XLetE p) [Binding' p] (RlpExpr' p)
                | VarE'  (XVarE p) (IdP p)
@@ -171,15 +177,15 @@ deriving instance
     , PhaseShow p
     ) => Show (RlpExpr p)
 
-type RlpExpr' p = XRec p RlpExpr
+type RlpExpr' p = XRec p (RlpExpr p)
 
 class UnXRec p where
-    unXRec :: XRec p f -> f p
+    unXRec :: XRec p a -> a
 
 class MapXRec p where
-    mapXRec :: (f p -> f' p') -> XRec p f -> XRec p' f'
+    mapXRec :: (a -> b) -> XRec p a -> XRec p b
 
-type family XRec p (f :: Type -> Type) = (r :: Type) | r -> p f
+type family XRec p a = (r :: Type) | r -> p a
 
 type family IdP p
 
@@ -193,9 +199,9 @@ deriving instance (PhaseShow p) => Show (Alt p)
 data Binding p = PatB (Pat' p) (RlpExpr' p)
                | FunB (IdP p) [Pat' p] (RlpExpr' p)
 
-type Binding' p = XRec p Binding
+type Binding' p = XRec p (Binding p)
 
-deriving instance (Show (XRec p Pat), Show (XRec p RlpExpr), Show (IdP p)
+deriving instance (Show (XRec p (Pat p)), Show (XRec p (RlpExpr p)), Show (IdP p)
                   ) => Show (Binding p)
 
 data Pat p = VarP (IdP p)
@@ -204,7 +210,7 @@ data Pat p = VarP (IdP p)
 
 deriving instance (PhaseShow p) => Show (Pat p)
 
-type Pat' p = XRec p Pat
+type Pat' p = XRec p (Pat p)
 
 data Lit p = IntL Int
            | CharL Char
@@ -212,7 +218,7 @@ data Lit p = IntL Int
 
 deriving instance (PhaseShow p) => Show (Lit p)
 
-type Lit' p = XRec p Lit
+type Lit' p = XRec p (Lit p)
 
 -- instance HasLHS Alt Alt Pat Pat where
 --     _lhs = lens
@@ -224,7 +230,7 @@ type Lit' p = XRec p Lit
 --         (\ (AltA _ e) -> e)
 --         (\ (AltA p _) e' -> AltA p e')
 
-makeBaseFunctor ''RlpExpr
+-- makeBaseFunctor ''RlpExpr
 
 -- showsTernaryWith :: (Int -> x -> ShowS)
 --                  -> (Int -> y -> ShowS)

src/Rlp2Core.hs

@@ -0,0 +1,40 @@
+module Rlp2Core
+    ( rlpProgToCore
+    )
+    where
+--------------------------------------------------------------------------------
+import Control.Monad
+import Control.Monad.Writer.CPS
+import Lens.Micro
+import Lens.Micro.Internal
+import Data.Text                        (Text)
+import Data.Text                        qualified as T
+import Data.HashMap.Strict              qualified as H
+
+import Core.Syntax                      as Core
+import Rlp.Syntax                       as Rlp
+import Rlp.Parse.Types                  (RlpcPs)
+--------------------------------------------------------------------------------
+
+rlpProgToCore :: RlpProgram RlpcPs -> Program'
+rlpProgToCore = foldMapOf (progDecls . each) declToCore
+
+declToCore :: Decl' RlpcPs -> Program'
+
+declToCore = undefined
+
+-- declToCore (TySigD ns t) =
+--     mempty & programTypeSigs .~ H.fromList [ (n, typeToCore t) | n <- ns ]
+
+typeToCore :: RlpType RlpcPs -> Type
+typeToCore = undefined
+-- typeToCore FunConT = TyFun
+-- typeToCore (FunT s t) = typeToCore s :-> typeToCore t
+-- typeToCore (AppT s t) = TyApp (typeToCore s) (typeToCore t)
+-- typeToCore (ConT n) = TyCon (dsNameToName n)
+-- typeToCore (VarT x) = TyVar (dsNameToName x)
+
+-- | Forwards-compatiblity if IdP RlpDs is changed
+dsNameToName :: IdP RlpcPs -> Name
+dsNameToName = id
+