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{-# LANGUAGE ParallelListComp #-}
module Main where
import Text.PrettyPrint
import System.Environment ( getArgs )
main = do
[s] <- getArgs
let n = read s
mapM_ (putStrLn . render . generate) [2..n]
generate :: Int -> Doc
generate n =
vcat [ text "#ifdef DEFINE_INSTANCES"
, data_instance "MVector s" "MV"
, data_instance "Vector" "V"
, class_instance "Unbox"
, class_instance "M.MVector MVector" <+> text "where"
, nest 2 $ vcat $ map method methods_MVector
, class_instance "G.Vector Vector" <+> text "where"
, nest 2 $ vcat $ map method methods_Vector
, text "#endif"
, text "#ifdef DEFINE_MUTABLE"
, define_zip "MVector s" "MV"
, define_unzip "MVector s" "MV"
, text "#endif"
, text "#ifdef DEFINE_IMMUTABLE"
, define_zip "Vector" "V"
, define_zip_rule
, define_unzip "Vector" "V"
, text "#endif"
]
where
vars = map char $ take n ['a'..]
varss = map (<> char 's') vars
tuple xs = parens $ hsep $ punctuate comma xs
vtuple xs = parens $ sep $ punctuate comma xs
con s = text s <> char '_' <> int n
var c = text (c : "_")
data_instance ty c
= hang (hsep [text "data instance", text ty, tuple vars])
4
(hsep [char '=', con c, text "{-# UNPACK #-} !Int"
, vcat $ map (\v -> char '!' <> parens (text ty <+> v)) vars])
class_instance cls
= text "instance" <+> vtuple [text "Unbox" <+> v | v <- vars]
<+> text "=>" <+> text cls <+> tuple vars
define_zip ty c
= sep [text "-- | /O(1)/ Zip" <+> int n <+> text "vectors"
,name <+> text "::"
<+> vtuple [text "Unbox" <+> v | v <- vars]
<+> text "=>"
<+> sep (punctuate (text " ->") [text ty <+> v | v <- vars])
<+> text "->"
<+> text ty <+> tuple vars
,text "{-# INLINE_STREAM" <+> name <+> text "#-}"
,name <+> sep varss
<+> text "="
<+> con c
<+> text "len"
<+> sep [parens $ text "unsafeSlice"
<+> char '0'
<+> text "len"
<+> vs | vs <- varss]
,nest 2 $ hang (text "where")
2
$ text "len ="
<+> sep (punctuate (text " `delayed_min`")
[text "length" <+> vs | vs <- varss])
]
where
name | n == 2 = text "zip"
| otherwise = text "zip" <> int n
define_zip_rule
= hang (text "{-# RULES" <+> text "\"stream/" <> name "zip"
<> text " [Vector.Unboxed]\" forall" <+> sep varss <+> char '.')
2 $
text "G.stream" <+> parens (name "zip" <+> sep varss)
<+> char '='
<+> text "Stream." <> name "zipWith" <+> tuple (replicate n empty)
<+> sep [parens $ text "G.stream" <+> vs | vs <- varss]
$$ text "#-}"
where
name s | n == 2 = text s
| otherwise = text s <> int n
define_unzip ty c
= sep [text "-- | /O(1)/ Unzip" <+> int n <+> text "vectors"
,name <+> text "::"
<+> vtuple [text "Unbox" <+> v | v <- vars]
<+> text "=>"
<+> text ty <+> tuple vars
<+> text "->" <+> vtuple [text ty <+> v | v <- vars]
,text "{-# INLINE" <+> name <+> text "#-}"
,name <+> pat c <+> text "="
<+> vtuple varss
]
where
name | n == 2 = text "unzip"
| otherwise = text "unzip" <> int n
pat c = parens $ con c <+> var 'n' <+> sep varss
patn c n = parens $ con c <+> (var 'n' <> int n)
<+> sep [v <> int n | v <- varss]
qM s = text "M." <> text s
qG s = text "G." <> text s
gen_length c _ = (pat c, var 'n')
gen_unsafeSlice mod c rec
= (var 'i' <+> var 'm' <+> pat c,
con c <+> var 'm'
<+> vcat [parens
$ text mod <> char '.' <> text rec
<+> var 'i' <+> var 'm' <+> vs
| vs <- varss])
gen_overlaps rec = (patn "MV" 1 <+> patn "MV" 2,
vcat $ r : [text "||" <+> r | r <- rs])
where
r : rs = [qM rec <+> v <> char '1' <+> v <> char '2' | v <- varss]
gen_unsafeNew rec
= (var 'n',
mk_do [v <+> text "<-" <+> qM rec <+> var 'n' | v <- varss]
$ text "return $" <+> con "MV" <+> var 'n' <+> sep varss)
gen_unsafeReplicate rec
= (var 'n' <+> tuple vars,
mk_do [vs <+> text "<-" <+> qM rec <+> var 'n' <+> v
| v <- vars | vs <- varss]
$ text "return $" <+> con "MV" <+> var 'n' <+> sep varss)
gen_unsafeRead rec
= (pat "MV" <+> var 'i',
mk_do [v <+> text "<-" <+> qM rec <+> vs <+> var 'i' | v <- vars
| vs <- varss]
$ text "return" <+> tuple vars)
gen_unsafeWrite rec
= (pat "MV" <+> var 'i' <+> tuple vars,
mk_do [qM rec <+> vs <+> var 'i' <+> v | v <- vars | vs <- varss]
empty)
gen_clear rec
= (pat "MV", mk_do [qM rec <+> vs | vs <- varss] empty)
gen_set rec
= (pat "MV" <+> tuple vars,
mk_do [qM rec <+> vs <+> v | vs <- varss | v <- vars] empty)
gen_unsafeCopy c q rec
= (patn "MV" 1 <+> patn c 2,
mk_do [q rec <+> vs <> char '1' <+> vs <> char '2' | vs <- varss]
empty)
gen_unsafeMove rec
= (patn "MV" 1 <+> patn "MV" 2,
mk_do [qM rec <+> vs <> char '1' <+> vs <> char '2' | vs <- varss]
empty)
gen_unsafeGrow rec
= (pat "MV" <+> var 'm',
mk_do [vs <> char '\'' <+> text "<-"
<+> qM rec <+> vs <+> var 'm' | vs <- varss]
$ text "return $" <+> con "MV"
<+> parens (var 'm' <> char '+' <> var 'n')
<+> sep (map (<> char '\'') varss))
gen_unsafeFreeze rec
= (pat "MV",
mk_do [vs <> char '\'' <+> text "<-" <+> qG rec <+> vs | vs <- varss]
$ text "return $" <+> con "V" <+> var 'n'
<+> sep [vs <> char '\'' | vs <- varss])
gen_unsafeThaw rec
= (pat "V",
mk_do [vs <> char '\'' <+> text "<-" <+> qG rec <+> vs | vs <- varss]
$ text "return $" <+> con "MV" <+> var 'n'
<+> sep [vs <> char '\'' | vs <- varss])
gen_basicUnsafeIndexM rec
= (pat "V" <+> var 'i',
mk_do [v <+> text "<-" <+> qG rec <+> vs <+> var 'i'
| vs <- varss | v <- vars]
$ text "return" <+> tuple vars)
gen_elemseq rec
= (char '_' <+> tuple vars,
vcat $ r : [char '.' <+> r | r <- rs])
where
r : rs = [qG rec <+> parens (text "undefined :: Vector" <+> v)
<+> v | v <- vars]
mk_do cmds ret = hang (text "do")
2
$ vcat $ cmds ++ [ret]
method (s, f) = case f s of
(p,e) -> text "{-# INLINE" <+> text s <+> text " #-}"
$$ hang (text s <+> p)
4
(char '=' <+> e)
methods_MVector = [("basicLength", gen_length "MV")
,("basicUnsafeSlice", gen_unsafeSlice "M" "MV")
,("basicOverlaps", gen_overlaps)
,("basicUnsafeNew", gen_unsafeNew)
,("basicUnsafeReplicate", gen_unsafeReplicate)
,("basicUnsafeRead", gen_unsafeRead)
,("basicUnsafeWrite", gen_unsafeWrite)
,("basicClear", gen_clear)
,("basicSet", gen_set)
,("basicUnsafeCopy", gen_unsafeCopy "MV" qM)
,("basicUnsafeMove", gen_unsafeMove)
,("basicUnsafeGrow", gen_unsafeGrow)]
methods_Vector = [("basicUnsafeFreeze", gen_unsafeFreeze)
,("basicUnsafeThaw", gen_unsafeThaw)
,("basicLength", gen_length "V")
,("basicUnsafeSlice", gen_unsafeSlice "G" "V")
,("basicUnsafeIndexM", gen_basicUnsafeIndexM)
,("basicUnsafeCopy", gen_unsafeCopy "V" qG)
,("elemseq", gen_elemseq)]
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