Break up Parser.hs, make use of Parsec optional
This commit is contained in:
John Wiegley
parent
29909a2598
commit
9b12ebf081
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@ -0,0 +1 @@
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/Setup
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462
Nix.hs
462
Nix.hs
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@ -1,457 +1,19 @@
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--{-# LANGUAGE BangPatterns #-}
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{-# LANGUAGE DataKinds #-}
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{-# LANGUAGE DeriveDataTypeable #-}
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--{-# LANGUAGE DeriveFunctor #-}
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{-# LANGUAGE DeriveGeneric #-}
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{-# LANGUAGE FlexibleContexts #-}
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{-# LANGUAGE FlexibleInstances #-}
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{-# LANGUAGE GADTs #-}
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{-# LANGUAGE KindSignatures #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE MultiWayIf #-}
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{-# LANGUAGE OverloadedStrings #-}
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--{-# LANGUAGE PatternGuards #-}
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{-# LANGUAGE RankNTypes #-}
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{-# LANGUAGE TupleSections #-}
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--{-# LANGUAGE ViewPatterns #-}
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module Main where
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module Nix where
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import Control.Applicative
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import Control.Arrow
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import Control.Monad hiding (forM_, mapM, sequence)
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--import Control.Monad.IO.Class
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--import Control.Monad.Trans.Class
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--import Control.Monad.Trans.Control
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--import Control.Monad.Trans.Either
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--import Control.Monad.Trans.Reader
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import Data.Char
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import Data.Data
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import Data.Foldable
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import Data.Map (Map)
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import qualified Data.Map as Map
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--import Data.Monoid
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import qualified Data.Text as T
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import Data.Text hiding (concat, concatMap, head, map)
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--import Data.Text.IO
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import Data.Traversable
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--import Data.Typeable
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import GHC.Generics
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import qualified Prelude
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import Prelude hiding (readFile, concat, concatMap, elem, mapM,
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sequence)
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import System.Environment
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--import System.IO.Memoize
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-- import Text.Parsec hiding ((<|>), many, optional)
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-- import Text.Parsec.Text
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import Text.Trifecta
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import Text.Parser.LookAhead
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--import Debug.Trace
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trace :: a -> b -> b
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trace _ x = x
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loeb :: Functor f => f (f a -> a) -> f a
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loeb xs = ys where ys = fmap ($ ys) xs
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{-# INLINE loeb #-}
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newtype Fix (f :: * -> *) = Fix { outF :: f (Fix f) }
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cata :: Functor f => (f a -> a) -> Fix f -> a
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cata f = f . fmap (cata f) . outF
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cataM :: (Traversable f, Monad m) => (f a -> m a) -> Fix f -> m a
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cataM f = f <=< mapM (cataM f) . outF
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data NAtom
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= NStr Text
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| NInt Integer
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| NPath FilePath
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| NBool Bool
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| NSym Text
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| NNull
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deriving (Eq, Ord, Generic, Typeable, Data)
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instance Show (NAtom) where
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show (NStr s) = show s
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show (NInt i) = show i
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show (NPath p) = show p
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show (NBool b) = if b then "true" else "false"
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show (NSym s) = unpack s
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show NNull = "null"
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atomText :: NAtom -> Text
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atomText (NStr s) = s
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atomText (NInt i) = pack (show i)
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atomText (NPath p) = pack p
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atomText (NBool b) = if b then "true" else "false"
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atomText (NSym s) = s
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atomText NNull = "null"
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dumpAtom :: NAtom -> String
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dumpAtom (NStr s) = "NStr " ++ show s
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dumpAtom (NInt i) = "NInt " ++ show i
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dumpAtom (NPath p) = "NPath " ++ show p
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dumpAtom (NBool b) = "NBool " ++ show b
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dumpAtom (NSym s) = "NSym " ++ show s
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dumpAtom NNull = "NNull"
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data NExprF r
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= NConstant NAtom
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| NList [r]
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| NConcat [r]
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-- ^ A "concat" is a list of things which must combine to form a string.
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| NArgSet (Map Text (Maybe r))
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| NSet Bool [(r, r)]
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| NLet r r
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| NIf r r r
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| NWith r r
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| NAssert r r
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| NVar r
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| NApp r r
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| NAbs r r
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-- ^ The untyped lambda calculus core
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deriving (Ord, Eq, Generic, Typeable, Data)
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-- An 'NValue' is the most reduced form of an 'NExpr' after evaluation
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-- is completed.
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data NValueF r
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= NVConstant NAtom
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| NVList [r]
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| NVSet (Map Text r)
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| NVArgSet (Map Text (Maybe r))
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| NVFunction r (NValue -> IO r)
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deriving (Generic, Typeable)
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instance Functor NExprF where
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fmap _ (NConstant a) = NConstant a
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fmap f (NList r) = NList (fmap f r)
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fmap f (NConcat r) = NConcat (fmap f r)
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fmap f (NArgSet h) = NArgSet (fmap (fmap f) h)
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fmap f (NSet b h) = NSet b $ map go h
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where go (k, v) = (f k, f v)
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fmap f (NLet r r1) = NLet (f r) (f r1)
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fmap f (NIf r r1 r2) = NIf (f r) (f r1) (f r2)
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fmap f (NWith r r1) = NWith (f r) (f r1)
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fmap f (NAssert r r1) = NAssert (f r) (f r1)
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fmap f (NVar r) = NVar (f r)
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fmap f (NApp r r1) = NApp (f r) (f r1)
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fmap f (NAbs r r1) = NAbs (f r) (f r1)
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type NExpr = Fix NExprF
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instance Functor NValueF where
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fmap _ (NVConstant a) = NVConstant a
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fmap f (NVList xs) = NVList (fmap f xs)
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fmap f (NVSet h) = NVSet (fmap f h)
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fmap f (NVArgSet h) = NVArgSet (fmap (fmap f) h)
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fmap f (NVFunction argset k) = NVFunction (f argset) (fmap f . k)
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type NValue = Fix NValueF
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instance Show f => Show (NExprF f) where
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show (NConstant x) = show x
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show (NList l) = "[ " ++ go l ++ " ]"
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where
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go [] = ""
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go [x] = show x
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go (x:xs) = show x ++ ", " ++ go xs
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show (NConcat l) = go l
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where
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go [] = ""
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go [x] = show x
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go (x:xs) = show x ++ " ++ " ++ go xs
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show (NArgSet h) = "{ " ++ go (Map.toList h) ++ " }"
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where
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go [] = ""
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go [x] = showArg x
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go (x:xs) = showArg x ++ ", " ++ go xs
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showArg (k, Nothing) = unpack k
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showArg (k, Just v) = unpack k ++ " ? " ++ show v
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show (NSet b xs) = (if b then "rec " else "")
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++ "{ " ++ concatMap go xs ++ " }"
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where
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go (k, v) = show k ++ " = " ++ show v ++ "; "
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show (NLet v e) = "let " ++ show v ++ "; " ++ show e
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show (NIf i t e) = "if " ++ show i ++ " then " ++ show t ++ " else " ++ show e
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show (NWith c v) = "with " ++ show c ++ "; " ++ show v
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show (NAssert e v) = "assert " ++ show e ++ "; " ++ show v
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show (NVar v) = show v
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show (NApp f x) = show f ++ " " ++ show x
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show (NAbs a b) = show a ++ ": " ++ show b
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dumpExpr :: NExpr -> String
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dumpExpr = cata phi where
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phi (NConstant x) = "NConstant " ++ dumpAtom x
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phi (NList l) = "NList [" ++ show l ++ "]"
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phi (NConcat l) = "NConcat " ++ show l
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phi (NArgSet xs) = "NArgSet " ++ show xs
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phi (NSet b xs) = "NSet " ++ show b ++ " " ++ show xs
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phi (NLet v e) = "NLet " ++ v ++ " " ++ e
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phi (NIf i t e) = "NIf " ++ i ++ " " ++ t ++ " " ++ e
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phi (NWith c v) = "NWith " ++ c ++ " " ++ v
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phi (NAssert e v) = "NAssert " ++ e ++ " " ++ v
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phi (NVar v) = "NVar " ++ v
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phi (NApp f x) = "NApp " ++ f ++ " " ++ x
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phi (NAbs a b) = "NAbs " ++ a ++ " " ++ b
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valueText :: NValue -> Text
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valueText = cata phi where
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phi (NVConstant a) = atomText a
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phi (NVList _) = error "Cannot coerce a list to a string"
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phi (NVSet _) = error "Cannot coerce a set to a string"
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phi (NVArgSet _) = error "Cannot coerce an argument list to a string"
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mkInt :: Integer -> NExpr
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mkInt = Fix . NConstant . NInt
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mkStr :: Text -> NExpr
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mkStr = Fix . NConstant . NStr
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mkPath :: FilePath -> NExpr
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mkPath = Fix . NConstant . NPath
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mkSym :: Text -> NExpr
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mkSym = Fix . NConstant . NSym
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mkBool :: Bool -> NExpr
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mkBool = Fix . NConstant . NBool
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mkNull :: NExpr
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mkNull = Fix (NConstant NNull)
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instance Show (Fix NExprF) where show (Fix f) = show f
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instance Eq (Fix NExprF) where Fix x == Fix y = x == y
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instance Ord (Fix NExprF) where compare (Fix x) (Fix y) = compare x y
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nixApp :: Parser NExpr
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nixApp = go <$> some (whiteSpace *> nixTerm True)
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where
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go [x] = x
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go (f:xs) = Fix (NApp f (go xs))
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nixTerm :: Bool -> Parser NExpr
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nixTerm allowLambdas = choice
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[ mkInt <$> decimal <?> "integer"
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, (string "true" *> pure (mkBool True)) <?> "bool"
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, (string "false" *> pure (mkBool False)) <?> "bool"
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, (string "null" *> pure mkNull) <?> "null"
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, between (symbolic '(') (symbolic ')') nixApp
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<?> "parens"
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, between (symbolic '[') (symbolic ']')
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(Fix . NList <$> many (nixTerm False))
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<?> "list"
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, try (do chars <- some (satisfy isPathChar)
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trace ("Path chars: " ++ show chars) $ return ()
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guard ('/' `elem` chars)
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return $ mkPath chars)
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, maybeSetOrLambda allowLambdas
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]
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maybeSetOrLambda :: Bool -> Parser NExpr
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maybeSetOrLambda allowLambdas = do
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trace "maybeSetOrLambda" $ return ()
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x <- try (lookAhead symName)
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<|> try (lookAhead (singleton <$> char '{'))
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<|> return ""
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if x == "rec" || x == "{"
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then setOrArgs
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else do
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trace "might still have a lambda" $ return ()
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y <- try (lookAhead (symName *> whiteSpace *> symbolic ':'
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*> return True))
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<|> return False
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trace ("results are = " ++ show y) $ return ()
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if y
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then if allowLambdas
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then setOrArgs
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else error "Unexpected lambda"
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else keyName <?> "string"
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isPathChar :: Char -> Bool
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isPathChar c = isAlpha c || c `Prelude.elem` ".:/"
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oneChar :: Parser NExpr
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oneChar = mkStr . singleton <$> anyChar
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stringChar :: Parser NExpr
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stringChar = char '\\' *> oneChar
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<|> (string "${" *> nixApp <* char '}')
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<|> (mkStr . pack <$> many (noneOf "\"\\"))
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symName :: Parser Text
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symName = do
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chars <- some (satisfy (\c -> isAlpha c || c == '.'))
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trace ("chars = " ++ show chars) $ return ()
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guard (isLower (head chars))
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return $ pack (trace ("chars: " ++ show chars) chars)
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stringish :: Parser NExpr
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stringish
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= (char '"' *>
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(Fix . NConcat <$> manyTill stringChar (char '"')))
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<|> (char '$' *> between (symbolic '{') (symbolic '}') nixApp)
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keyName :: Parser NExpr
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keyName = (stringish <|> (mkSym <$> symName)) <* whiteSpace
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nvPair :: Parser (NExpr, NExpr)
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nvPair = (,) <$> keyName
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<*> (symbolic '=' *> nixApp)
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argExpr :: Parser NExpr
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argExpr = (Fix . NArgSet . Map.fromList <$> argList)
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<|> ((mkSym <$> symName) <?> "argname")
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argList :: Parser [(Text, Maybe NExpr)]
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argList = between (symbolic '{') (symbolic '}')
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((argName <* whiteSpace) `sepBy` symbolic ',')
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<?> "arglist"
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argName :: Parser (Text, Maybe NExpr)
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argName = (,) <$> (symName <* whiteSpace)
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<*> optional (try (symbolic '?' *> nixApp))
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whiteSymbolic :: Char -> Parser Char
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whiteSymbolic c = whiteSpace *> symbolic c
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lookaheadForSet :: Parser Bool
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lookaheadForSet = do
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trace "lookaheadForSet" $ return ()
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x <- (symbolic '{' *> return True) <|> return False
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if not x then return x else do
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y <- (keyName *> return True) <|> return False
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if not y then return y else
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(symbolic '=' *> return True) <|> return False
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setOrArgs :: Parser NExpr
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setOrArgs = do
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trace "setOrArgs" $ return ()
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sawRec <- try (symbol "rec" *> pure True) <|> pure False
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trace ("Do we have sawRec: " ++ show sawRec) $ return ()
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haveSet <-
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if sawRec
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then return True
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else try (lookAhead lookaheadForSet)
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trace ("Do we have a set: " ++ show haveSet) $ return ()
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if haveSet
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then between (symbolic '{') (symbolic '}')
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(Fix . NSet sawRec <$> nvPair `endBy` symbolic ';')
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<?> "set"
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else do
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trace "parsing arguments" $ return ()
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args <- argExpr <?> "arguments"
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trace ("args: " ++ show args) $ return ()
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symbolic ':' *> ((Fix .) . NAbs <$> pure args <*> nixApp)
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<|> pure args
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-- symbol :: String -> Parser String
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-- symbol str = string str <* whiteSpace
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-- symbolic :: Char -> Parser Char
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-- symbolic c = char c <* whiteSpace
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-- decimal :: Parser Integer
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-- decimal = read <$> some digit
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-- whiteSpace :: Parser ()
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-- whiteSpace = spaces
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-- parseFromFile :: Parser a -> FilePath -> IO (Maybe a)
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-- parseFromFile p path = do
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-- txt <- readFile path
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-- case parse p path txt of
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-- Left e -> error (show e)
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-- Right r -> return $ Just r
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buildArgument :: NValue -> NValue -> NValue
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buildArgument paramSpec arg = do
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-- Having the typed lambda calculus would make this code much safer.
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Fix $ NVSet $ case paramSpec of
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Fix (NVArgSet s) ->
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case arg of
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Fix (NVSet s') ->
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Map.foldlWithKey' (go s') Map.empty s
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_ -> error "Unexpected function environment"
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Fix (NVConstant (NSym name)) ->
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Map.singleton name arg
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where
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go env m k v = case Map.lookup k env of
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Nothing
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| Just v' <- v -> Map.insert k v' m
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| otherwise -> error $ "Could not find " ++ show k
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Just v' -> Map.insert k v' m
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evalExpr :: NExpr -> NValue -> IO NValue
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evalExpr = cata phi
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where
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phi :: NExprF (NValue -> IO NValue) -> NValue -> IO NValue
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phi (NConstant x) = const $ return $ Fix $ NVConstant x
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phi (NList l) = \env ->
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Fix . NVList <$> mapM ($ env) l
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phi (NConcat l) = \env ->
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Fix . NVConstant . NStr . T.concat
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<$> mapM (fmap valueText . ($ env)) l
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phi (NArgSet xs) = error "Cannot evaluate an argument set"
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phi (NSet b xs) = \env ->
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Fix . NVSet . Map.fromList
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<$> mapM (fmap (first valueText) . go env) xs
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where
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go env (x, y) = liftM2 (,) (x env) (y env)
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phi (NLet v e) = error "let: not implemented"
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phi (NIf i t e) = error "if: not implemented"
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phi (NWith c v) = error "with: not implemented"
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phi (NAssert e v) = error "assert: not implemented"
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phi (NVar v) = error "var: not implemented"
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phi (NApp fun x) = \env -> do
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fun' <- fun env
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case fun' of
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Fix (NVFunction argset f) -> do
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arg <- x env
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let arg' = buildArgument argset arg
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f arg'
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_ -> error "Attempt to call non-function"
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phi (NAbs a b) = \env -> do
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-- jww (2014-06-28): arglists should not receive the current
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-- environment, but rather should recursively view their own arg
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-- set
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args <- a env
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return $ Fix $ NVFunction args b
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import Data.Map as Map
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import Nix.Eval
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import Nix.Parser
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import Nix.Types
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import System.Environment
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nix :: FilePath -> IO ()
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nix path = do
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mn <- parseFromFile nixApp path
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forM_ mn $ \n -> do
|
||||
top <- evalExpr n (Fix (NVSet Map.empty)) -- evaluate the top level
|
||||
case top of
|
||||
Fix (NVConstant atom) ->
|
||||
Prelude.putStrLn $ "Evaluated atom: " ++ show atom
|
||||
Fix (NVList xs) ->
|
||||
Prelude.putStrLn "Evaluated to a list"
|
||||
Fix (NVSet atom) ->
|
||||
Prelude.putStrLn "Evaluated to a set"
|
||||
res <- parseNixFile path
|
||||
case res of
|
||||
Failure e -> error $ "Parse failed: " ++ show e
|
||||
Success n -> do
|
||||
top <- evalExpr n (Fix (NVSet Map.empty)) -- evaluate top level
|
||||
print top
|
||||
|
||||
main :: IO ()
|
||||
main = do
|
||||
|
|
|
|||
|
|
@ -0,0 +1,72 @@
|
|||
module Nix.Eval where
|
||||
|
||||
import Control.Applicative
|
||||
import Control.Arrow
|
||||
import Control.Monad hiding (forM_, mapM, sequence)
|
||||
import qualified Data.Map as Map
|
||||
import qualified Data.Text as T
|
||||
import Data.Traversable
|
||||
import Nix.Types
|
||||
import Prelude hiding (readFile, concat, concatMap, elem, mapM,
|
||||
sequence)
|
||||
|
||||
buildArgument :: NValue -> NValue -> NValue
|
||||
buildArgument paramSpec arg =
|
||||
-- Having the typed lambda calculus would make this code much safer.
|
||||
Fix $ NVSet $ case paramSpec of
|
||||
Fix (NVArgSet s) ->
|
||||
case arg of
|
||||
Fix (NVSet s') ->
|
||||
Map.foldlWithKey' (go s') Map.empty s
|
||||
_ -> error "Unexpected function environment"
|
||||
Fix (NVConstant (NSym name)) -> Map.singleton name arg
|
||||
_ -> error $ "Unexpected param spec: " ++ show paramSpec
|
||||
where
|
||||
go env m k v = case Map.lookup k env of
|
||||
Nothing
|
||||
| Just v' <- v -> Map.insert k v' m
|
||||
| otherwise -> error $ "Could not find " ++ show k
|
||||
Just v' -> Map.insert k v' m
|
||||
|
||||
evalExpr :: NExpr -> NValue -> IO NValue
|
||||
evalExpr = cata phi
|
||||
where
|
||||
phi :: NExprF (NValue -> IO NValue) -> NValue -> IO NValue
|
||||
phi (NConstant x) = const $ return $ Fix $ NVConstant x
|
||||
|
||||
phi (NList l) = \env ->
|
||||
Fix . NVList <$> mapM ($ env) l
|
||||
|
||||
phi (NConcat l) = \env ->
|
||||
Fix . NVConstant . NStr . T.concat
|
||||
<$> mapM (fmap valueText . ($ env)) l
|
||||
|
||||
phi (NArgSet _xs) = error "Cannot evaluate an argument set"
|
||||
|
||||
phi (NSet _b xs) = \env ->
|
||||
Fix . NVSet . Map.fromList
|
||||
<$> mapM (fmap (first valueText) . go env) xs
|
||||
where
|
||||
go env (x, y) = liftM2 (,) (x env) (y env)
|
||||
|
||||
phi (NLet _v _e) = error "let: not implemented"
|
||||
phi (NIf _i _t _e) = error "if: not implemented"
|
||||
phi (NWith _c _v) = error "with: not implemented"
|
||||
phi (NAssert _e _v) = error "assert: not implemented"
|
||||
phi (NVar _v) = error "var: not implemented"
|
||||
|
||||
phi (NApp fun x) = \env -> do
|
||||
fun' <- fun env
|
||||
case fun' of
|
||||
Fix (NVFunction argset f) -> do
|
||||
arg <- x env
|
||||
let arg' = buildArgument argset arg
|
||||
f arg'
|
||||
_ -> error "Attempt to call non-function"
|
||||
|
||||
phi (NAbs a b) = \env -> do
|
||||
-- jww (2014-06-28): arglists should not receive the current
|
||||
-- environment, but rather should recursively view their own arg
|
||||
-- set
|
||||
args <- a env
|
||||
return $ Fix $ NVFunction args b
|
||||
|
|
@ -0,0 +1,5 @@
|
|||
module Nix.Internal (trace) where
|
||||
|
||||
--import Debug.Trace
|
||||
trace :: String -> b -> b
|
||||
trace _ x = x
|
||||
336
Nix/Parser.hs
336
Nix/Parser.hs
|
|
@ -1,220 +1,52 @@
|
|||
module Nix.Parser where
|
||||
{-# LANGUAGE CPP #-}
|
||||
|
||||
module Nix.Parser (parseNixFile, Result(..)) where
|
||||
|
||||
import Control.Applicative
|
||||
import Control.Arrow
|
||||
import Control.Monad hiding (forM_, mapM, sequence)
|
||||
import Control.Monad.IO.Class
|
||||
import Data.Char
|
||||
import Data.Data
|
||||
import Data.Foldable
|
||||
import Data.Map (Map)
|
||||
import qualified Data.Map as Map
|
||||
import qualified Data.Text as T
|
||||
import Data.Text hiding (concat, concatMap, head, map)
|
||||
import Data.Traversable
|
||||
import GHC.Generics
|
||||
import Nix.Types
|
||||
import Nix.Internal
|
||||
import qualified Prelude
|
||||
import Prelude hiding (readFile, concat, concatMap, elem, mapM,
|
||||
sequence)
|
||||
import System.Environment
|
||||
|
||||
#if USE_PARSEC
|
||||
import Data.Text.IO
|
||||
import Text.Parsec hiding ((<|>), many, optional)
|
||||
import Text.Parsec.Text
|
||||
import Text.PrettyPrint.ANSI.Leijen (Doc, text)
|
||||
|
||||
symbol :: String -> Parser String
|
||||
symbol str = string str <* whiteSpace
|
||||
|
||||
symbolic :: Char -> Parser Char
|
||||
symbolic c = char c <* whiteSpace
|
||||
|
||||
decimal :: Parser Integer
|
||||
decimal = read <$> some digit
|
||||
|
||||
whiteSpace :: Parser ()
|
||||
whiteSpace = spaces
|
||||
|
||||
data Result a = Success a
|
||||
| Failure Doc
|
||||
|
||||
parseFromFileEx :: MonadIO m => Parser a -> FilePath -> m (Result a)
|
||||
parseFromFileEx p path =
|
||||
(either (Failure . text . show) Success . parse p path)
|
||||
`liftM` liftIO (readFile path)
|
||||
#else
|
||||
import Text.Trifecta
|
||||
import Text.Parser.LookAhead
|
||||
#endif
|
||||
|
||||
--import Debug.Trace
|
||||
trace :: String -> b -> b
|
||||
trace _ x = x
|
||||
|
||||
loeb :: Functor f => f (f a -> a) -> f a
|
||||
loeb xs = ys where ys = fmap ($ ys) xs
|
||||
{-# INLINE loeb #-}
|
||||
|
||||
newtype Fix (f :: * -> *) = Fix { outF :: f (Fix f) }
|
||||
|
||||
cata :: Functor f => (f a -> a) -> Fix f -> a
|
||||
cata f = f . fmap (cata f) . outF
|
||||
|
||||
cataM :: (Traversable f, Monad m) => (f a -> m a) -> Fix f -> m a
|
||||
cataM f = f <=< mapM (cataM f) . outF
|
||||
|
||||
data NAtom
|
||||
= NStr Text
|
||||
| NInt Integer
|
||||
| NPath FilePath
|
||||
| NBool Bool
|
||||
| NSym Text
|
||||
| NNull
|
||||
deriving (Eq, Ord, Generic, Typeable, Data)
|
||||
|
||||
instance Show (NAtom) where
|
||||
show (NStr s) = show s
|
||||
show (NInt i) = show i
|
||||
show (NPath p) = show p
|
||||
show (NBool b) = if b then "true" else "false"
|
||||
show (NSym s) = unpack s
|
||||
show NNull = "null"
|
||||
|
||||
atomText :: NAtom -> Text
|
||||
atomText (NStr s) = s
|
||||
atomText (NInt i) = pack (show i)
|
||||
atomText (NPath p) = pack p
|
||||
atomText (NBool b) = if b then "true" else "false"
|
||||
atomText (NSym s) = s
|
||||
atomText NNull = "null"
|
||||
|
||||
dumpAtom :: NAtom -> String
|
||||
dumpAtom (NStr s) = "NStr " ++ show s
|
||||
dumpAtom (NInt i) = "NInt " ++ show i
|
||||
dumpAtom (NPath p) = "NPath " ++ show p
|
||||
dumpAtom (NBool b) = "NBool " ++ show b
|
||||
dumpAtom (NSym s) = "NSym " ++ show s
|
||||
dumpAtom NNull = "NNull"
|
||||
|
||||
data NExprF r
|
||||
= NConstant NAtom
|
||||
|
||||
| NList [r]
|
||||
| NConcat [r]
|
||||
-- ^ A "concat" is a list of things which must combine to form a string.
|
||||
| NArgSet (Map Text (Maybe r))
|
||||
| NSet Bool [(r, r)]
|
||||
|
||||
| NLet r r
|
||||
| NIf r r r
|
||||
| NWith r r
|
||||
| NAssert r r
|
||||
|
||||
| NVar r
|
||||
| NApp r r
|
||||
| NAbs r r
|
||||
-- ^ The untyped lambda calculus core
|
||||
deriving (Ord, Eq, Generic, Typeable, Data)
|
||||
|
||||
-- An 'NValue' is the most reduced form of an 'NExpr' after evaluation
|
||||
-- is completed.
|
||||
data NValueF r
|
||||
= NVConstant NAtom
|
||||
| NVList [r]
|
||||
| NVSet (Map Text r)
|
||||
| NVArgSet (Map Text (Maybe r))
|
||||
| NVFunction r (NValue -> IO r)
|
||||
deriving (Generic, Typeable)
|
||||
|
||||
instance Functor NExprF where
|
||||
fmap _ (NConstant a) = NConstant a
|
||||
fmap f (NList r) = NList (fmap f r)
|
||||
fmap f (NConcat r) = NConcat (fmap f r)
|
||||
fmap f (NArgSet h) = NArgSet (fmap (fmap f) h)
|
||||
fmap f (NSet b h) = NSet b $ map go h
|
||||
where go (k, v) = (f k, f v)
|
||||
fmap f (NLet r r1) = NLet (f r) (f r1)
|
||||
fmap f (NIf r r1 r2) = NIf (f r) (f r1) (f r2)
|
||||
fmap f (NWith r r1) = NWith (f r) (f r1)
|
||||
fmap f (NAssert r r1) = NAssert (f r) (f r1)
|
||||
fmap f (NVar r) = NVar (f r)
|
||||
fmap f (NApp r r1) = NApp (f r) (f r1)
|
||||
fmap f (NAbs r r1) = NAbs (f r) (f r1)
|
||||
|
||||
type NExpr = Fix NExprF
|
||||
|
||||
instance Functor NValueF where
|
||||
fmap _ (NVConstant a) = NVConstant a
|
||||
fmap f (NVList xs) = NVList (fmap f xs)
|
||||
fmap f (NVSet h) = NVSet (fmap f h)
|
||||
fmap f (NVArgSet h) = NVArgSet (fmap (fmap f) h)
|
||||
fmap f (NVFunction argset k) = NVFunction (f argset) (fmap f . k)
|
||||
|
||||
type NValue = Fix NValueF
|
||||
|
||||
instance Show f => Show (NValueF f) where
|
||||
show (NVConstant a) = "NVConstant " ++ show a
|
||||
show (NVList xs) = "NVList " ++ show xs
|
||||
show (NVSet h) = "NVSet " ++ show h
|
||||
show (NVArgSet h) = "NVArgSet " ++ show h
|
||||
show (NVFunction argset _) = "NVFunction " ++ show argset
|
||||
|
||||
instance Show f => Show (NExprF f) where
|
||||
show (NConstant x) = show x
|
||||
|
||||
show (NList l) = "[ " ++ go l ++ " ]"
|
||||
where
|
||||
go [] = ""
|
||||
go [x] = show x
|
||||
go (x:xs) = show x ++ ", " ++ go xs
|
||||
|
||||
show (NConcat l) = go l
|
||||
where
|
||||
go [] = ""
|
||||
go [x] = show x
|
||||
go (x:xs) = show x ++ " ++ " ++ go xs
|
||||
|
||||
show (NArgSet h) = "{ " ++ go (Map.toList h) ++ " }"
|
||||
where
|
||||
go [] = ""
|
||||
go [x] = showArg x
|
||||
go (x:xs) = showArg x ++ ", " ++ go xs
|
||||
|
||||
showArg (k, Nothing) = unpack k
|
||||
showArg (k, Just v) = unpack k ++ " ? " ++ show v
|
||||
|
||||
show (NSet b xs) = (if b then "rec " else "")
|
||||
++ "{ " ++ concatMap go xs ++ " }"
|
||||
where
|
||||
go (k, v) = show k ++ " = " ++ show v ++ "; "
|
||||
|
||||
show (NLet v e) = "let " ++ show v ++ "; " ++ show e
|
||||
show (NIf i t e) = "if " ++ show i ++ " then " ++ show t ++ " else " ++ show e
|
||||
show (NWith c v) = "with " ++ show c ++ "; " ++ show v
|
||||
show (NAssert e v) = "assert " ++ show e ++ "; " ++ show v
|
||||
|
||||
show (NVar v) = show v
|
||||
show (NApp f x) = show f ++ " " ++ show x
|
||||
show (NAbs a b) = show a ++ ": " ++ show b
|
||||
|
||||
dumpExpr :: NExpr -> String
|
||||
dumpExpr = cata phi where
|
||||
phi (NConstant x) = "NConstant " ++ dumpAtom x
|
||||
phi (NList l) = "NList [" ++ show l ++ "]"
|
||||
phi (NConcat l) = "NConcat " ++ show l
|
||||
phi (NArgSet xs) = "NArgSet " ++ show xs
|
||||
phi (NSet b xs) = "NSet " ++ show b ++ " " ++ show xs
|
||||
phi (NLet v e) = "NLet " ++ v ++ " " ++ e
|
||||
phi (NIf i t e) = "NIf " ++ i ++ " " ++ t ++ " " ++ e
|
||||
phi (NWith c v) = "NWith " ++ c ++ " " ++ v
|
||||
phi (NAssert e v) = "NAssert " ++ e ++ " " ++ v
|
||||
phi (NVar v) = "NVar " ++ v
|
||||
phi (NApp f x) = "NApp " ++ f ++ " " ++ x
|
||||
phi (NAbs a b) = "NAbs " ++ a ++ " " ++ b
|
||||
|
||||
valueText :: NValue -> Text
|
||||
valueText = cata phi where
|
||||
phi (NVConstant a) = atomText a
|
||||
phi (NVList _) = error "Cannot coerce a list to a string"
|
||||
phi (NVSet _) = error "Cannot coerce a set to a string"
|
||||
phi (NVArgSet _) = error "Cannot coerce an argument list to a string"
|
||||
phi (NVFunction _ _) = error "Cannot coerce a function to a string"
|
||||
|
||||
mkInt :: Integer -> NExpr
|
||||
mkInt = Fix . NConstant . NInt
|
||||
|
||||
mkStr :: Text -> NExpr
|
||||
mkStr = Fix . NConstant . NStr
|
||||
|
||||
mkPath :: FilePath -> NExpr
|
||||
mkPath = Fix . NConstant . NPath
|
||||
|
||||
mkSym :: Text -> NExpr
|
||||
mkSym = Fix . NConstant . NSym
|
||||
|
||||
mkBool :: Bool -> NExpr
|
||||
mkBool = Fix . NConstant . NBool
|
||||
|
||||
mkNull :: NExpr
|
||||
mkNull = Fix (NConstant NNull)
|
||||
|
||||
instance Show (Fix NValueF) where show (Fix f) = show f
|
||||
|
||||
instance Show (Fix NExprF) where show (Fix f) = show f
|
||||
instance Eq (Fix NExprF) where Fix x == Fix y = x == y
|
||||
instance Ord (Fix NExprF) where compare (Fix x) (Fix y) = compare x y
|
||||
parseNixFile :: MonadIO m => FilePath -> m (Result NExpr)
|
||||
parseNixFile = parseFromFileEx nixApp
|
||||
|
||||
nixApp :: Parser NExpr
|
||||
nixApp = go <$> some (whiteSpace *> nixTerm True)
|
||||
|
|
@ -310,8 +142,8 @@ argName :: Parser (Text, Maybe NExpr)
|
|||
argName = (,) <$> (symName <* whiteSpace)
|
||||
<*> optional (try (symbolic '?' *> nixApp))
|
||||
|
||||
whiteSymbolic :: Char -> Parser Char
|
||||
whiteSymbolic c = whiteSpace *> symbolic c
|
||||
-- whiteSymbolic :: Char -> Parser Char
|
||||
-- whiteSymbolic c = whiteSpace *> symbolic c
|
||||
|
||||
lookaheadForSet :: Parser Bool
|
||||
lookaheadForSet = do
|
||||
|
|
@ -342,95 +174,3 @@ setOrArgs = do
|
|||
trace ("args: " ++ show args) $ return ()
|
||||
symbolic ':' *> ((Fix .) . NAbs <$> pure args <*> nixApp)
|
||||
<|> pure args
|
||||
|
||||
-- symbol :: String -> Parser String
|
||||
-- symbol str = string str <* whiteSpace
|
||||
|
||||
-- symbolic :: Char -> Parser Char
|
||||
-- symbolic c = char c <* whiteSpace
|
||||
|
||||
-- decimal :: Parser Integer
|
||||
-- decimal = read <$> some digit
|
||||
|
||||
-- whiteSpace :: Parser ()
|
||||
-- whiteSpace = spaces
|
||||
|
||||
-- parseFromFile :: Parser a -> FilePath -> IO (Maybe a)
|
||||
-- parseFromFile p path = do
|
||||
-- txt <- readFile path
|
||||
-- case parse p path txt of
|
||||
-- Left e -> error (show e)
|
||||
-- Right r -> return $ Just r
|
||||
|
||||
buildArgument :: NValue -> NValue -> NValue
|
||||
buildArgument paramSpec arg =
|
||||
-- Having the typed lambda calculus would make this code much safer.
|
||||
Fix $ NVSet $ case paramSpec of
|
||||
Fix (NVArgSet s) ->
|
||||
case arg of
|
||||
Fix (NVSet s') ->
|
||||
Map.foldlWithKey' (go s') Map.empty s
|
||||
_ -> error "Unexpected function environment"
|
||||
Fix (NVConstant (NSym name)) -> Map.singleton name arg
|
||||
_ -> error $ "Unexpected param spec: " ++ show paramSpec
|
||||
where
|
||||
go env m k v = case Map.lookup k env of
|
||||
Nothing
|
||||
| Just v' <- v -> Map.insert k v' m
|
||||
| otherwise -> error $ "Could not find " ++ show k
|
||||
Just v' -> Map.insert k v' m
|
||||
|
||||
evalExpr :: NExpr -> NValue -> IO NValue
|
||||
evalExpr = cata phi
|
||||
where
|
||||
phi :: NExprF (NValue -> IO NValue) -> NValue -> IO NValue
|
||||
phi (NConstant x) = const $ return $ Fix $ NVConstant x
|
||||
|
||||
phi (NList l) = \env ->
|
||||
Fix . NVList <$> mapM ($ env) l
|
||||
|
||||
phi (NConcat l) = \env ->
|
||||
Fix . NVConstant . NStr . T.concat
|
||||
<$> mapM (fmap valueText . ($ env)) l
|
||||
|
||||
phi (NArgSet _xs) = error "Cannot evaluate an argument set"
|
||||
|
||||
phi (NSet _b xs) = \env ->
|
||||
Fix . NVSet . Map.fromList
|
||||
<$> mapM (fmap (first valueText) . go env) xs
|
||||
where
|
||||
go env (x, y) = liftM2 (,) (x env) (y env)
|
||||
|
||||
phi (NLet _v _e) = error "let: not implemented"
|
||||
phi (NIf _i _t _e) = error "if: not implemented"
|
||||
phi (NWith _c _v) = error "with: not implemented"
|
||||
phi (NAssert _e _v) = error "assert: not implemented"
|
||||
phi (NVar _v) = error "var: not implemented"
|
||||
|
||||
phi (NApp fun x) = \env -> do
|
||||
fun' <- fun env
|
||||
case fun' of
|
||||
Fix (NVFunction argset f) -> do
|
||||
arg <- x env
|
||||
let arg' = buildArgument argset arg
|
||||
f arg'
|
||||
_ -> error "Attempt to call non-function"
|
||||
|
||||
phi (NAbs a b) = \env -> do
|
||||
-- jww (2014-06-28): arglists should not receive the current
|
||||
-- environment, but rather should recursively view their own arg
|
||||
-- set
|
||||
args <- a env
|
||||
return $ Fix $ NVFunction args b
|
||||
|
||||
nix :: FilePath -> IO ()
|
||||
nix path = do
|
||||
mn <- parseFromFile nixApp path
|
||||
forM_ mn $ \n -> do
|
||||
top <- evalExpr n (Fix (NVSet Map.empty)) -- evaluate the top level
|
||||
print top
|
||||
|
||||
main :: IO ()
|
||||
main = do
|
||||
[path] <- getArgs
|
||||
nix path
|
||||
|
|
|
|||
|
|
@ -0,0 +1,193 @@
|
|||
module Nix.Types where
|
||||
|
||||
import Control.Monad hiding (forM_, mapM, sequence)
|
||||
import Data.Data
|
||||
import Data.Foldable
|
||||
import Data.Map (Map)
|
||||
import qualified Data.Map as Map
|
||||
import Data.Text hiding (concat, concatMap, head, map)
|
||||
import Data.Traversable
|
||||
import GHC.Generics
|
||||
import Prelude hiding (readFile, concat, concatMap, elem, mapM,
|
||||
sequence)
|
||||
|
||||
newtype Fix (f :: * -> *) = Fix { outF :: f (Fix f) }
|
||||
|
||||
cata :: Functor f => (f a -> a) -> Fix f -> a
|
||||
cata f = f . fmap (cata f) . outF
|
||||
|
||||
cataM :: (Traversable f, Monad m) => (f a -> m a) -> Fix f -> m a
|
||||
cataM f = f <=< mapM (cataM f) . outF
|
||||
|
||||
data NAtom
|
||||
= NStr Text
|
||||
| NInt Integer
|
||||
| NPath FilePath
|
||||
| NBool Bool
|
||||
| NSym Text
|
||||
| NNull
|
||||
deriving (Eq, Ord, Generic, Typeable, Data)
|
||||
|
||||
instance Show (NAtom) where
|
||||
show (NStr s) = "NStr " ++ show s
|
||||
show (NInt i) = "NInt " ++ show i
|
||||
show (NPath p) = "NPath " ++ show p
|
||||
show (NBool b) = "NBool " ++ show b
|
||||
show (NSym s) = "NSym " ++ show s
|
||||
show NNull = "NNull"
|
||||
|
||||
atomText :: NAtom -> Text
|
||||
atomText (NStr s) = s
|
||||
atomText (NInt i) = pack (show i)
|
||||
atomText (NPath p) = pack p
|
||||
atomText (NBool b) = if b then "true" else "false"
|
||||
atomText (NSym s) = s
|
||||
atomText NNull = "null"
|
||||
|
||||
data NExprF r
|
||||
= NConstant NAtom
|
||||
|
||||
| NList [r]
|
||||
| NConcat [r]
|
||||
-- ^ A "concat" is a list of things which must combine to form a string.
|
||||
| NArgSet (Map Text (Maybe r))
|
||||
| NSet Bool [(r, r)]
|
||||
|
||||
| NLet r r
|
||||
| NIf r r r
|
||||
| NWith r r
|
||||
| NAssert r r
|
||||
|
||||
| NVar r
|
||||
| NApp r r
|
||||
| NAbs r r
|
||||
-- ^ The untyped lambda calculus core
|
||||
deriving (Ord, Eq, Generic, Typeable, Data)
|
||||
|
||||
type NExpr = Fix NExprF
|
||||
|
||||
instance Show (Fix NExprF) where show (Fix f) = show f
|
||||
instance Eq (Fix NExprF) where Fix x == Fix y = x == y
|
||||
instance Ord (Fix NExprF) where compare (Fix x) (Fix y) = compare x y
|
||||
|
||||
instance Functor NExprF where
|
||||
fmap _ (NConstant a) = NConstant a
|
||||
fmap f (NList r) = NList (fmap f r)
|
||||
fmap f (NConcat r) = NConcat (fmap f r)
|
||||
fmap f (NArgSet h) = NArgSet (fmap (fmap f) h)
|
||||
fmap f (NSet b h) = NSet b $ map go h
|
||||
where go (k, v) = (f k, f v)
|
||||
fmap f (NLet r r1) = NLet (f r) (f r1)
|
||||
fmap f (NIf r r1 r2) = NIf (f r) (f r1) (f r2)
|
||||
fmap f (NWith r r1) = NWith (f r) (f r1)
|
||||
fmap f (NAssert r r1) = NAssert (f r) (f r1)
|
||||
fmap f (NVar r) = NVar (f r)
|
||||
fmap f (NApp r r1) = NApp (f r) (f r1)
|
||||
fmap f (NAbs r r1) = NAbs (f r) (f r1)
|
||||
|
||||
instance Show f => Show (NExprF f) where
|
||||
show (NConstant x) = show x
|
||||
|
||||
show (NList l) = "[ " ++ go l ++ " ]"
|
||||
where
|
||||
go [] = ""
|
||||
go [x] = show x
|
||||
go (x:xs) = show x ++ ", " ++ go xs
|
||||
|
||||
show (NConcat l) = go l
|
||||
where
|
||||
go [] = ""
|
||||
go [x] = show x
|
||||
go (x:xs) = show x ++ " ++ " ++ go xs
|
||||
|
||||
show (NArgSet h) = "{ " ++ go (Map.toList h) ++ " }"
|
||||
where
|
||||
go [] = ""
|
||||
go [x] = showArg x
|
||||
go (x:xs) = showArg x ++ ", " ++ go xs
|
||||
|
||||
showArg (k, Nothing) = unpack k
|
||||
showArg (k, Just v) = unpack k ++ " ? " ++ show v
|
||||
|
||||
show (NSet b xs) = (if b then "rec " else "")
|
||||
++ "{ " ++ concatMap go xs ++ " }"
|
||||
where
|
||||
go (k, v) = show k ++ " = " ++ show v ++ "; "
|
||||
|
||||
show (NLet v e) = "let " ++ show v ++ "; " ++ show e
|
||||
show (NIf i t e) = "if " ++ show i ++ " then " ++ show t ++ " else " ++ show e
|
||||
show (NWith c v) = "with " ++ show c ++ "; " ++ show v
|
||||
show (NAssert e v) = "assert " ++ show e ++ "; " ++ show v
|
||||
|
||||
show (NVar v) = show v
|
||||
show (NApp f x) = show f ++ " " ++ show x
|
||||
show (NAbs a b) = show a ++ ": " ++ show b
|
||||
|
||||
dumpExpr :: NExpr -> String
|
||||
dumpExpr = cata phi where
|
||||
phi (NConstant x) = "NConstant " ++ show x
|
||||
phi (NList l) = "NList [" ++ show l ++ "]"
|
||||
phi (NConcat l) = "NConcat " ++ show l
|
||||
phi (NArgSet xs) = "NArgSet " ++ show xs
|
||||
phi (NSet b xs) = "NSet " ++ show b ++ " " ++ show xs
|
||||
phi (NLet v e) = "NLet " ++ v ++ " " ++ e
|
||||
phi (NIf i t e) = "NIf " ++ i ++ " " ++ t ++ " " ++ e
|
||||
phi (NWith c v) = "NWith " ++ c ++ " " ++ v
|
||||
phi (NAssert e v) = "NAssert " ++ e ++ " " ++ v
|
||||
phi (NVar v) = "NVar " ++ v
|
||||
phi (NApp f x) = "NApp " ++ f ++ " " ++ x
|
||||
phi (NAbs a b) = "NAbs " ++ a ++ " " ++ b
|
||||
|
||||
mkInt :: Integer -> NExpr
|
||||
mkInt = Fix . NConstant . NInt
|
||||
|
||||
mkStr :: Text -> NExpr
|
||||
mkStr = Fix . NConstant . NStr
|
||||
|
||||
mkPath :: FilePath -> NExpr
|
||||
mkPath = Fix . NConstant . NPath
|
||||
|
||||
mkSym :: Text -> NExpr
|
||||
mkSym = Fix . NConstant . NSym
|
||||
|
||||
mkBool :: Bool -> NExpr
|
||||
mkBool = Fix . NConstant . NBool
|
||||
|
||||
mkNull :: NExpr
|
||||
mkNull = Fix (NConstant NNull)
|
||||
|
||||
-- An 'NValue' is the most reduced form of an 'NExpr' after evaluation
|
||||
-- is completed.
|
||||
data NValueF r
|
||||
= NVConstant NAtom
|
||||
| NVList [r]
|
||||
| NVSet (Map Text r)
|
||||
| NVArgSet (Map Text (Maybe r))
|
||||
| NVFunction r (NValue -> IO r)
|
||||
deriving (Generic, Typeable)
|
||||
|
||||
type NValue = Fix NValueF
|
||||
|
||||
instance Show (Fix NValueF) where show (Fix f) = show f
|
||||
|
||||
instance Functor NValueF where
|
||||
fmap _ (NVConstant a) = NVConstant a
|
||||
fmap f (NVList xs) = NVList (fmap f xs)
|
||||
fmap f (NVSet h) = NVSet (fmap f h)
|
||||
fmap f (NVArgSet h) = NVArgSet (fmap (fmap f) h)
|
||||
fmap f (NVFunction argset k) = NVFunction (f argset) (fmap f . k)
|
||||
|
||||
instance Show f => Show (NValueF f) where
|
||||
show (NVConstant a) = "NVConstant " ++ show a
|
||||
show (NVList xs) = "NVList " ++ show xs
|
||||
show (NVSet h) = "NVSet " ++ show h
|
||||
show (NVArgSet h) = "NVArgSet " ++ show h
|
||||
show (NVFunction argset _) = "NVFunction " ++ show argset
|
||||
|
||||
valueText :: NValue -> Text
|
||||
valueText = cata phi where
|
||||
phi (NVConstant a) = atomText a
|
||||
phi (NVList _) = error "Cannot coerce a list to a string"
|
||||
phi (NVSet _) = error "Cannot coerce a set to a string"
|
||||
phi (NVArgSet _) = error "Cannot coerce an argument list to a string"
|
||||
phi (NVFunction _ _) = error "Cannot coerce a function to a string"
|
||||
14
default.nix
14
default.nix
|
|
@ -1,14 +1,18 @@
|
|||
{ cabal, parsers, trifecta, text }:
|
||||
{ cabal, parsers, trifecta, text, ansiWlPprint, parsec, transformers
|
||||
, useParsec ? false
|
||||
}:
|
||||
|
||||
cabal.mkDerivation (self: {
|
||||
cabal.mkDerivation (self: rec {
|
||||
pname = "hnix";
|
||||
version = "0.0.1";
|
||||
src = ./.;
|
||||
isLibrary = true;
|
||||
isExecutable = true;
|
||||
buildDepends = [
|
||||
parsers
|
||||
trifecta
|
||||
ansiWlPprint
|
||||
text
|
||||
];
|
||||
transformers
|
||||
] ++ (if useParsec then [ parsec ] else [ parsers trifecta ]);
|
||||
meta = {
|
||||
homepage = "https://github.com/jwiegley/hnix";
|
||||
description = "Haskell implementation of the Nix language";
|
||||
|
|
|
|||
57
hnix.cabal
57
hnix.cabal
|
|
@ -10,12 +10,21 @@ Author: John Wiegley
|
|||
Maintainer: johnw@newartisans.com
|
||||
Category: Data, Nix
|
||||
Build-type: Simple
|
||||
Cabal-version: >=1.8
|
||||
Cabal-version: >=1.10
|
||||
Homepage: http://github.com/jwiegley/hnix
|
||||
|
||||
Flag Parsec
|
||||
Description: Use parsec instead of Trifecta
|
||||
Default: False
|
||||
|
||||
Library
|
||||
default-language: Haskell2010
|
||||
Exposed-modules:
|
||||
Nix.Eval
|
||||
Nix.Parser
|
||||
Nix.Types
|
||||
Other-modules:
|
||||
Nix.Internal
|
||||
Default-extensions:
|
||||
DataKinds
|
||||
DeriveDataTypeable
|
||||
|
|
@ -32,10 +41,52 @@ Library
|
|||
TupleSections
|
||||
Build-depends:
|
||||
base >= 4.3 && < 5
|
||||
, ansi-wl-pprint
|
||||
, containers
|
||||
, parsers
|
||||
, trifecta
|
||||
, text
|
||||
, transformers
|
||||
if flag(parsec)
|
||||
ghc-options: -DUSE_PARSEC
|
||||
Build-depends:
|
||||
parsec
|
||||
else
|
||||
Build-depends:
|
||||
parsers
|
||||
, trifecta
|
||||
ghc-options: -Wall
|
||||
|
||||
executable hnix
|
||||
default-language: Haskell2010
|
||||
main-is: Nix.hs
|
||||
Default-extensions:
|
||||
DataKinds
|
||||
DeriveDataTypeable
|
||||
DeriveGeneric
|
||||
FlexibleContexts
|
||||
FlexibleInstances
|
||||
GADTs
|
||||
KindSignatures
|
||||
LambdaCase
|
||||
MultiWayIf
|
||||
OverloadedStrings
|
||||
PatternGuards
|
||||
RankNTypes
|
||||
TupleSections
|
||||
build-depends:
|
||||
base >= 4.3 && < 5
|
||||
, hnix
|
||||
, ansi-wl-pprint
|
||||
, containers
|
||||
, text
|
||||
, transformers
|
||||
if flag(parsec)
|
||||
ghc-options: -DUSE_PARSEC
|
||||
Build-depends:
|
||||
parsec
|
||||
else
|
||||
Build-depends:
|
||||
parsers
|
||||
, trifecta
|
||||
ghc-options: -Wall
|
||||
|
||||
source-repository head
|
||||
|
|
|
|||
Loading…
Reference in New Issue