diff --git a/LICENSE b/LICENSE new file mode 100644 --- /dev/null +++ b/LICENSE @@ -0,0 +1,340 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. By contrast, the GNU General Public +License is intended to guarantee your freedom to share and change free +software--to make sure the software is free for all its users. This +General Public License applies to most of the Free Software +Foundation's software and to any other program whose authors commit to +using it. (Some other Free Software Foundation software is covered by +the GNU Library General Public License instead.) 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Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Setup.hs b/Setup.hs new file mode 100644 --- /dev/null +++ b/Setup.hs @@ -0,0 +1,5 @@ +#!/usr/bin/runhaskell + +import Distribution.Simple + +main = defaultMainWithHooks simpleUserHooks diff --git a/ShowFun.hs b/ShowFun.hs new file mode 100644 --- /dev/null +++ b/ShowFun.hs @@ -0,0 +1,11 @@ +-- Helper code for runplugs that doesn't agree with SmallCheck + +module ShowFun where + +import Data.Typeable + +instance (Typeable a, Typeable b) => Show (a -> b) where + show e = '<' : (show . typeOf) e ++ ">" + +instance Typeable a => Show (IO a) where + show e = '<' : (show . typeOf) e ++ ">" diff --git a/ShowQ.hs b/ShowQ.hs new file mode 100644 --- /dev/null +++ b/ShowQ.hs @@ -0,0 +1,112 @@ +-- Helper code for runplugs +-- +-- Note: must be kept in separate module to hide unsafePerformIO from +-- runplugs-generated eval code!! you're warned. + +module ShowQ where + +-- import Language.Haskell.TH +import System.IO.Unsafe +import Data.Dynamic +import Data.Ratio + +import Test.QuickCheck.Batch +import Test.QuickCheck +import Data.Char +import Data.List +import Data.Word +import Data.Int +import System.Random + +type T = [Int] +type I = Int + +-- instance Ppr a => Show (Q a) where +-- show e = unsafePerformIO $ runQ e >>= return . pprint + +instance Arbitrary Char where + arbitrary = choose (minBound, maxBound) + coarbitrary c = variant (ord c `rem` 4) + +instance Arbitrary Word8 where + arbitrary = choose (minBound, maxBound) + coarbitrary c = variant (fromIntegral ((fromIntegral c) `rem` 4)) + +instance Arbitrary Ordering where + arbitrary = elements [LT,EQ,GT] + coarbitrary LT = variant 1 + coarbitrary EQ = variant 2 + coarbitrary GT = variant 0 + +instance Arbitrary Int64 where + arbitrary = sized $ \n -> choose (-fromIntegral n,fromIntegral n) + coarbitrary n = variant (fromIntegral (if n >= 0 then 2*n else 2*(-n) + 1)) + +instance (Integral a, Arbitrary a) => Arbitrary (Ratio a) where + arbitrary = do a <- arbitrary + b <- arbitrary + return $ if b == 0 + then if a == 0 + then (1 % 1) + else (b % a) + else (a % b) + + coarbitrary m = variant (fromIntegral $ if n >= 0 then 2*n else 2*(-n) + 1) + where n = numerator m + +instance Random Word8 where + randomR = integralRandomR + random = randomR (minBound,maxBound) + +instance Random Int64 where + randomR = integralRandomR + random = randomR (minBound,maxBound) + +integralRandomR :: (Integral a, RandomGen g) => (a,a) -> g -> (a,g) +integralRandomR (a,b) g = case randomR (fromIntegral a :: Integer, + fromIntegral b :: Integer) g of + (x,g) -> (fromIntegral x, g) + +myquickcheck :: Testable a => a -> IO String +myquickcheck a = do + rnd <- newStdGen + tests (evaluate a) rnd 0 0 [] + +tests :: Gen Result -> StdGen -> Int -> Int -> [[String]] -> IO String +tests gen rnd0 ntest nfail stamps + | ntest == 500 = done "OK, passed" ntest stamps + | nfail == 1000 = done "Arguments exhausted after" ntest stamps + | otherwise = case ok result of + Nothing -> tests gen rnd1 ntest (nfail+1) stamps + Just True -> tests gen rnd1 (ntest+1) nfail (stamp result:stamps) + Just False -> return $ "Falsifiable, after " + ++ show ntest + ++ " tests:\n" + ++ unlines (arguments result) + where + result = generate (((+ 3) . (`div` 2)) ntest) rnd2 gen + (rnd1,rnd2) = split rnd0 + +done :: String -> Int -> [[String]] -> IO String +done mesg ntest stamps = return $ mesg ++ " " ++ show ntest ++ " tests" ++ table + where + table = display + . map entry + . reverse + . sort + . map pairLength + . group + . sort + . filter (not . null) + $ stamps + + display [] = ".\n" + display [x] = " (" ++ x ++ ").\n" + display xs = ".\n" ++ unlines (map (++ ".") xs) + + pairLength xss@(xs:_) = (length xss, xs) + entry (n, xs) = percentage n ntest + ++ " " + ++ concat (intersperse ", " xs) + + percentage n m = show ((100 * n) `div` m) ++ "%" diff --git a/SimpleReflect.hs b/SimpleReflect.hs new file mode 100644 --- /dev/null +++ b/SimpleReflect.hs @@ -0,0 +1,251 @@ +{-# LANGUAGE DeriveDataTypeable #-} +----------------------------------------------------------------------------- +-- | +-- Module : SimpleReflect +-- Copyright : (c) 2008 Twan van Laarhoven +-- License : BSD-style +-- +-- Maintainer : twanvl@gmail.com +-- Stability : experimental +-- Portability : portable +-- +-- Simple reflection of Haskell expressions containing variables. +-- +----------------------------------------------------------------------------- +module SimpleReflect + ( Expr + , var, fun, expr, reduce + , a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z + ) where + + +import Data.List +import Control.Applicative + +{- -- Lennart Augustsson's extensions, temporarily disabled. +import Control.Monad.State hiding(lift) +-} + +import Data.Typeable +import Data.Generics hiding (Fixity) + + +------------------------------------------------------------------------------ +-- Data type +------------------------------------------------------------------------------ + +data Expr = Expr + { showExpr :: Int -> ShowS + , intExpr :: Maybe Integer + , doubleExpr :: Maybe Double + , reduced :: Maybe Expr + } deriving (Typeable, Data) + +instance Show Expr where + showsPrec p r = showExpr r p + +-- Default expression +emptyExpr :: Expr +emptyExpr = Expr { showExpr = \_ -> showString "" + , intExpr = Nothing + , doubleExpr = Nothing + , reduced = Nothing + } + +------------------------------------------------------------------------------ +-- Lifting and combining expressions +------------------------------------------------------------------------------ + +-- | A variable +var :: String -> Expr +var s = emptyExpr { showExpr = \_ -> showString s } + +lift :: Show a => a -> Expr +lift x = emptyExpr { showExpr = \p -> showsPrec p x } + +data Fixity = L | R deriving Eq + +-- | A operator as expression +op :: Fixity -> Int -> String -> Expr -> Expr -> Expr +op fix prec op a b = emptyExpr { showExpr = showFun } + where showFun p = showParen (p > prec) + $ showExpr a (if fix == L then prec else prec + 1) + . showString op + . showExpr b (if fix == R then prec else prec + 1) + +------------------------------------------------------------------------------ +-- Adding numeric results +------------------------------------------------------------------------------ + +iOp r f a = (r a ) { intExpr = f <$> intExpr a } +iOp2 r f a b = (r a b) { intExpr = f <$> intExpr a <*> intExpr b } +dOp r f a = (r a ) { doubleExpr = f <$> doubleExpr a } +dOp2 r f a b = (r a b) { doubleExpr = f <$> doubleExpr a <*> doubleExpr b } + +withReduce r a = let rr = r a in + rr { reduced = withReduce r <$> reduced a + <|> fromInteger <$> intExpr rr + <|> fromDouble <$> doubleExpr rr + } +withReduce2 r a b = let rr = r a b in + rr { reduced = (\a' -> withReduce2 r a' b) <$> reduced a + <|> (\b' -> withReduce2 r a b') <$> reduced b + <|> fromInteger <$> intExpr rr + <|> fromDouble <$> doubleExpr rr + } + +------------------------------------------------------------------------------ +-- Function types +------------------------------------------------------------------------------ + +class FromExpr a where + fromExpr :: Expr -> a + +instance FromExpr Expr where + fromExpr = id + +instance (Show a, FromExpr b) => FromExpr (a -> b) where + fromExpr f a = fromExpr $ op L 10 " " f (lift a) + +fun :: FromExpr a => String -> a +fun = fromExpr . var + +------------------------------------------------------------------------------ +-- Variables! +------------------------------------------------------------------------------ + +a,b,c,d,e,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z :: Expr +[a,b,c,d,e,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w,x,y,z] + = [var [x] | x <- ['a'..'e']++['i'..'z']] + +f,g,h :: FromExpr a => a +f = fun "f" +g = fun "g" +h = fun "h" + +------------------------------------------------------------------------------ +-- Forcing conversion & evaluation +------------------------------------------------------------------------------ + +-- | Force something to be an expression +expr :: Expr -> Expr +expr = id + +-- | Reduce (evaluate) an expression once +-- for example 1 + 2 + 3 + 4 ==> 3 + 3 + 4 +reduce :: Expr -> Expr +reduce e = maybe e id (reduced e) + +reduction :: Expr -> [Expr] +reduction e = e : unfoldr (\e -> do e' <- reduced e; return (e',e')) e + +------------------------------------------------------------------------------ +-- Numeric classes +------------------------------------------------------------------------------ + +instance Eq Expr where + Expr{ intExpr = Just a } == Expr{ intExpr = Just b } = a == b + Expr{ doubleExpr = Just a } == Expr{ doubleExpr = Just b } = a == b + a == b = show a == show b + +instance Ord Expr where + compare Expr{ intExpr = Just a } Expr{ intExpr = Just b } = compare a b + compare Expr{ doubleExpr = Just a } Expr{ doubleExpr = Just b } = compare a b + compare a b = compare (show a) (show b) + min = fun "min" `iOp2` min `dOp2` min + max = fun "max" `iOp2` max `dOp2` max + +instance Num Expr where + (+) = withReduce2 $ op L 6 " + " `iOp2` (+) `dOp2` (+) + (-) = withReduce2 $ op L 6 " - " `iOp2` (-) `dOp2` (-) + (*) = withReduce2 $ op L 7 " * " `iOp2` (*) `dOp2` (*) + negate = withReduce $ fun "negate" `iOp` negate `dOp` negate + abs = withReduce $ fun "abs" `iOp` abs `dOp` abs + signum = withReduce $ fun "signum" `iOp` signum `dOp` signum + fromInteger i = (lift i) + { intExpr = Just i + , doubleExpr = Just $ fromInteger i } + +instance Real Expr where + toRational expr = case (doubleExpr expr, intExpr expr) of + (Just d,_) -> toRational d + (_,Just i) -> toRational i + _ -> error "not a number" + +instance Integral Expr where + quotRem a b = (quot a b, rem a b) + divMod a b = (div a b, mod a b) + quot = withReduce2 $ op L 7 " `quot` " `iOp2` quot + rem = withReduce2 $ op L 7 " `rem` " `iOp2` rem + div = withReduce2 $ op L 7 " `div` " `iOp2` div + mod = withReduce2 $ op L 7 " `mod` " `iOp2` mod + toInteger expr = case intExpr expr of + Just i -> i + _ -> error "not a number" + +instance Fractional Expr where + (/) = withReduce2 $ op L 7 " / " `dOp2` (/) + recip = withReduce $ fun "recip" `dOp` recip + fromRational r = fromDouble (fromRational r) + +fromDouble d = (lift d) { doubleExpr = Just d } + +instance Floating Expr where + pi = (var "pi") { doubleExpr = Just pi } + exp = withReduce $ fun "exp" `dOp` exp + sqrt = withReduce $ fun "sqrt" `dOp` sqrt + log = withReduce $ fun "log" `dOp` log + (**) = withReduce2 $ op R 8 "**" `dOp2` (**) + sin = withReduce $ fun "sin" `dOp` sin + cos = withReduce $ fun "cos" `dOp` cos + sinh = withReduce $ fun "sinh" `dOp` sinh + cosh = withReduce $ fun "cosh" `dOp` cosh + asin = withReduce $ fun "asin" `dOp` asin + acos = withReduce $ fun "acos" `dOp` acos + atan = withReduce $ fun "atan" `dOp` atan + asinh = withReduce $ fun "asinh" `dOp` asinh + acosh = withReduce $ fun "acosh" `dOp` acosh + atanh = withReduce $ fun "atanh" `dOp` atanh + +instance Enum Expr where + succ = withReduce $ fun "succ" `iOp` succ `dOp` succ + pred = withReduce $ fun "pred" `iOp` pred `dOp` pred + toEnum = fun "toEnum" + fromEnum = fromEnum . toInteger + enumFrom a = map fromInteger $ enumFrom (toInteger a) + enumFromThen a b = map fromInteger $ enumFromThen (toInteger a) (toInteger b) + enumFromTo a c = map fromInteger $ enumFromTo (toInteger a) (toInteger c) + enumFromThenTo a b c = map fromInteger $ enumFromThenTo (toInteger a) (toInteger b) (toInteger c) + +instance Bounded Expr where + minBound = var "minBound" + maxBound = var "maxBound" + +{- -- Lennart Augustsson's Extensions, temporarily disabled. +See . + +instance (Show a, ExprArg a, Show r) => Show (a -> r) where + showsPrec _ f = showString "\\ " . showsPrec 0 v . showString " -> " . + showsPrec 0 (f v) + where v = evalState exprArg vars + dummy = evalState exprArg $ repeat "_" + vars = supply \\ tokenize (show $ f dummy) + supply = ["x","y","z"] ++ [ "x" ++ show i | i <- [1..]] + tokenize "" = [] + tokenize s = case lex s of (x,s') : _ -> x : tokenize s' + +class ExprArg a where + exprArg :: State [String] a + +instance ExprArg Expr where + exprArg = do v:vs <- get; put vs; return (var v) + +instance ExprArg () where + exprArg = return () + +instance (ExprArg a, ExprArg b) => ExprArg (a, b) where + exprArg = liftM2 (,) exprArg exprArg + +instance (ExprArg a, ExprArg b, ExprArg c) => ExprArg (a, b, c) where + exprArg = liftM3 (,,) exprArg exprArg exprArg +-} diff --git a/show.cabal b/show.cabal new file mode 100644 --- /dev/null +++ b/show.cabal @@ -0,0 +1,31 @@ +name: show +version: 0.1 + +license: GPL +license-file: LICENSE +author: Lambdabot devs, Twan van Laarhoven +-- maintainer: Cale + +stability: Experimental +category: Language +synopsis: 'Show' instances for Lambdabot +description: This package provides ShowQ, ShowFun, and SimpleReflect. + . + ShowFun gives us Typeable instances for neutring IO expressions. + . + ShowQ adds QuickCheck support. + . + And SimpleReflect allows us to literally see how functions 'expand', + through appropriate Show magic. See . + +build-type: Simple +Cabal-Version: >= 1.2 +tested-with: GHC==6.8.2 + +library + exposed-modules: ShowQ, ShowFun, SimpleReflect + + build-depends: base, random, QuickCheck<2 + + ghc-options: -Wall + ghc-prof-options: -prof -auto-all