166 lines
3.9 KiB
Haskell
166 lines
3.9 KiB
Haskell
{-# LANGUAGE DeriveGeneric #-}
|
|
{-# LANGUAGE OverloadedStrings #-}
|
|
{-# LANGUAGE TypeOperators #-}
|
|
{-# LANGUAGE PartialTypeSignatures #-}
|
|
{-# LANGUAGE DerivingStrategies #-}
|
|
{-# LANGUAGE OrPatterns #-}
|
|
{-# LANGUAGE PatternSynonyms #-}
|
|
module Gyehoek.Scheme.Syntax
|
|
( Name(..)
|
|
, Prim(..)
|
|
, Lit(..)
|
|
, Define(..)
|
|
, Exp(..)
|
|
, Sexp(..)
|
|
, primSexpIso
|
|
)
|
|
where
|
|
|
|
import Data.Text (Text)
|
|
import Data.List (List)
|
|
import Language.SexpGrammar
|
|
( SexpIso(..), list, el, (>>>), rest, sym, symbol )
|
|
import Language.SexpGrammar qualified as Sexp
|
|
import Language.SexpGrammar.Generic
|
|
import GHC.Generics
|
|
import Prelude hiding ((.), id)
|
|
import Control.Category
|
|
import Data.List.NonEmpty (NonEmpty ((:|)))
|
|
import Gyehoek.Sexp qualified
|
|
import Gyehoek.GenSym (Gen)
|
|
import Control.Lens (Each)
|
|
import Data.String (IsString)
|
|
import Data.Hashable (Hashable)
|
|
|
|
|
|
newtype Name = MkName { getName :: Text }
|
|
deriving newtype (Show, Eq, IsString, Gen, Hashable)
|
|
deriving stock (Generic)
|
|
|
|
data Prim e
|
|
= PrimAdd e e
|
|
| PrimSub e e
|
|
| PrimMul e e
|
|
| PrimDiv e e
|
|
| PrimCons e e
|
|
| PrimCar e
|
|
| PrimCdr e
|
|
| PrimImmediateP e
|
|
| PrimConsP e
|
|
| PrimIntegerP e
|
|
| PrimWrite e
|
|
| PrimZeroP e
|
|
| PrimNewline
|
|
deriving (Show, Generic, Functor, Foldable, Traversable)
|
|
|
|
instance Each (Prim e) (Prim e') e e'
|
|
|
|
data Lit
|
|
= LitInt Int
|
|
| LitNil
|
|
| LitBool Bool
|
|
| LitString Text
|
|
| LitQuote Sexp
|
|
deriving (Show, Generic)
|
|
|
|
data Define
|
|
= DefineConstant Name Exp
|
|
| DefineProcedure Name (List Name) (List Exp)
|
|
deriving (Show, Generic)
|
|
|
|
data Exp
|
|
= ExpLet (NonEmpty (Name, Exp)) Exp
|
|
| ExpPrim (Prim Exp)
|
|
| ExpBegin (List Exp)
|
|
| ExpDefine Define
|
|
| ExpIf Exp Exp Exp
|
|
| ExpLit Lit
|
|
| ExpLambda (List Name) Exp
|
|
| ExpVar Name
|
|
| ExpApply Exp (List Exp)
|
|
deriving (Show, Generic)
|
|
|
|
data Sexp
|
|
= SexpCons Sexp Sexp
|
|
| SexpSymbol Text
|
|
| SexpLit Lit
|
|
deriving (Show, Generic)
|
|
|
|
|
|
|
|
instance SexpIso Name where
|
|
sexpIso = symbol >>> Sexp.partialOsi f g
|
|
where
|
|
f = Right . MkName
|
|
g (MkName s) = s
|
|
|
|
primSexpIso :: (Text -> Text) -> Sexp.SexpGrammar a -> Sexp.SexpGrammar (Prim a)
|
|
primSexpIso namefn a = match
|
|
$ With (. binop "+")
|
|
$ With (. binop "-")
|
|
$ With (. binop "*")
|
|
$ With (. binop "/")
|
|
$ With (. binop "cons")
|
|
$ With (. unop "car")
|
|
$ With (. unop "cdr")
|
|
$ With (. unop "immediate?")
|
|
$ With (. unop "cons?")
|
|
$ With (. unop "integer?")
|
|
$ With (. unop "write")
|
|
$ With (. unop "zero?")
|
|
$ With (. nullop "newline")
|
|
$ End
|
|
where
|
|
idn s = el (sym (namefn s))
|
|
nullop s = list $ idn s
|
|
unop s = list $ idn s >>> el a
|
|
binop s = list $ idn s >>> el a >>> el a
|
|
|
|
instance SexpIso a => SexpIso (Prim a) where
|
|
sexpIso = primSexpIso ("prim:"<>) sexpIso
|
|
|
|
instance SexpIso Lit where
|
|
sexpIso = match
|
|
$ With (. sexpIso)
|
|
$ With (. sym "nil")
|
|
$ With (. sexpIso)
|
|
$ With (. sexpIso)
|
|
$ With (. Gyehoek.Sexp.prefixSugar "quote" Sexp.Quote sexpIso)
|
|
$ End
|
|
|
|
instance SexpIso Sexp where
|
|
sexpIso = match
|
|
$ With (\cons -> cons . Gyehoek.Sexp.todo)
|
|
$ With (\s -> s . symbol)
|
|
$ With (\lit -> lit . sexpIso)
|
|
$ End
|
|
|
|
instance SexpIso Define where
|
|
sexpIso = match
|
|
$ With (. defconst)
|
|
$ With (. defun)
|
|
$ End
|
|
where
|
|
defconst = list $ el (sym "define") >>> el sexpIso >>> el sexpIso
|
|
defun = list $ el (sym "define") >>> el args >>> rest sexpIso
|
|
args = list $ el sexpIso >>> rest sexpIso
|
|
|
|
instance SexpIso Exp where
|
|
sexpIso = match
|
|
$ With (. Gyehoek.Sexp.let_ "let" sexpIso sexpIso sexpIso)
|
|
$ With (. sexpIso)
|
|
$ With (\bgn -> bgn . list (el (sym "begin") >>> rest sexpIso))
|
|
$ With (. sexpIso)
|
|
$ With (. if_)
|
|
$ With (. sexpIso)
|
|
$ With (. lam)
|
|
$ With (. sexpIso)
|
|
$ With (\app -> app . list (el sexpIso >>> rest sexpIso))
|
|
$ End
|
|
where
|
|
if_ = list $ el (sym "if") >>> el sexpIso >>> el sexpIso >>> el sexpIso
|
|
lam = list
|
|
( el Gyehoek.Sexp.lambdaKeyword
|
|
>>> el (sexpIso @(List Name))
|
|
>>> el sexpIso )
|