--- /dev/null
+module gopt
+
+import StdEnv, StdGeneric
+
+import Data.List
+import Data.Error
+import Data.Func
+import Data.Functor
+import Data.Tuple
+import Data.Maybe
+import Control.Applicative
+import Control.Monad => qualified join
+import System.CommandLine
+import Text
+
+:: Opt a
+ = BinaryFlag (a -> a) (a -> a)
+ | Flags [(String, ([String] a -> (MaybeError [String] (a, [String]))))]
+ | Positionals [(String, String a -> (MaybeError [String] a))]
+ | SubParsers [(String, Opt a)]
+
+class bifmap m :: (a -> b) (b -> a) (m b) -> m a
+instance bifmap Opt
+where
+ bifmap fr to (BinaryFlag set unset) = BinaryFlag (to o set o fr) (to o unset o fr)
+ bifmap fr to (Flags fs) = Flags $ map (appSnd $ (\f s->fm (appFst to) o f s o fr)) fs
+ bifmap fr to (Positionals fs) = Positionals $ map (appSnd $ fmap $ \f->fm to o f o fr) fs
+ bifmap fr to (SubParsers sp) = SubParsers $ map (appSnd (bifmap fr to)) sp
+
+fm f (Ok a) = Ok (f a)
+fm f (Error e) = Error e
+
+combine sel app p s t = p s (sel t) >>= \l->pure (app (const l) t)
+combine` sel app p s t = p s (sel t) >>= \(l, as)->pure ((app (const l) t), as)
+
+ar0 s f as = Ok o flip tuple as o f
+
+generic gopt a *! :: Opt a
+//generic gopt a :: Opt a
+gopt{|Bool|} = BinaryFlag (const True) (const False)
+gopt{|Int|} = Positionals [("INT", \s _->if (and [isDigit c\\c<-:s]) (Ok $ toInt s) (Error ["Not an integer"]))]
+gopt{|Char|} = Positionals [("CHAR", \s _->if (size s == 1) (Ok s.[0]) (Error ["Not a single character"]))]
+gopt{|String|} = Positionals [("STRING", \s _->Ok s)]
+gopt{|RECORD|} f = bifmap (\(RECORD a)->a) (\x->RECORD x) f
+gopt{|OBJECT|} f = bifmap (\(OBJECT a)->a) (\x->OBJECT x) f
+gopt{|FIELD of {gfd_name}|} f = case f of
+ //Child is a boolean
+ BinaryFlag set unset = mapF $ Flags [(gfd_name, ar0 gfd_name set), ("no-" +++ gfd_name, ar0 ("no-" +++ gfd_name) unset)]
+ //Child is a basic value or a tuple
+ Positionals ps = mapF $ Flags [(gfd_name, ptoarg ps)]
+ //Child is another record, make the arguments ddstyle TODO
+ Flags x = mapF (Flags x)
+ //Child is a subparser
+ SubParsers ps = mapF (Flags [(gfd_name, pOpts (SubParsers ps))])
+ x = abort "Subparsers not supported"
+where
+ mapF :: ((m a) -> m (FIELD a)) | bifmap m
+ mapF = bifmap (\(FIELD a)->a) (\x->FIELD x)
+
+ ptoarg [p] [] i = Error ["Not enough arguments for " +++ gfd_name]
+ ptoarg [(_, p):ps] [a:as] i = p a i >>= ptoarg ps as
+ ptoarg [] as i = Ok (i, as)
+gopt{|PAIR|} l r = case (l, r) of
+ (Positionals pl, Positionals pr)
+ = Positionals
+ $ map (appSnd $ combine PFst appPFst) pl
+ ++ map (appSnd $ combine PSnd appPSnd) pr
+ (Flags fl, Flags fr)
+ = Flags
+ $ map (appSnd $ combine` PFst appPFst) fl
+ ++ map (appSnd $ combine` PSnd appPSnd) fr
+ (x, y) = abort $ "gopt{|PAIR|}: " +++ consPrint x +++ " " +++ consPrint y
+where
+ appPFst f (PAIR x y) = PAIR (f x) y
+ appPSnd f (PAIR x y) = PAIR x (f y)
+ PFst (PAIR x y) = x
+ PSnd (PAIR x y) = y
+gopt{|UNIT|} = Positionals []
+gopt{|CONS of {gcd_name}|} c = bifmap (\(CONS a)->a) CONS $ SubParsers [(gcd_name, c)]
+gopt{|EITHER|} l r = case (l, r) of
+ (SubParsers sl, SubParsers sr)
+ = SubParsers
+ $ map (appSnd $ bifmap (\(LEFT a)->a) LEFT) sl
+ ++ map (appSnd $ bifmap (\(RIGHT a)->a) RIGHT) sr
+gopt{|(,)|} l r = case (l, r) of
+ (Positionals pl, Positionals pr)
+ = Positionals
+ $ map (appSnd $ combine fst appFst) pl
+ ++ map (appSnd $ combine snd appSnd) pr
+gopt{|(,,)|} f s t = case (f, s, t) of
+ (Positionals pf, Positionals ps, Positionals pt)
+ = Positionals
+ $ map (appSnd $ combine fst3 appFst3) pf
+ ++ map (appSnd $ combine snd3 appSnd3) ps
+ ++ map (appSnd $ combine thd3 appThd3) pt
+
+consPrint (Positionals x) = "Positionals"
+consPrint (BinaryFlag x _) = "BinaryFlag"
+consPrint (Flags x) = "Flags"
+consPrint (SubParsers x) = "SubParsers"
+
+parseOpts :: [String] a -> MaybeError [String] (a, [String]) | gopt{|*|} a
+parseOpts args a = pOpts gopt{|*|} args a
+
+pOpts :: (Opt a) [String] a -> MaybeError [String] (a, [String])
+pOpts (Positionals [p:ps]) [] a = Error [toString (length [p:ps]) +++ " positional arguments required"]
+pOpts (Positionals [p:ps]) [arg:args] a = (snd p) arg a >>= pOpts (Positionals ps) args
+pOpts (SubParsers ps) [arg:args] a = case find (\(l,p)->l==arg) ps of
+ Nothing = Error ["Unrecognized subcommand"]
+ Just (l, p) = pOpts p args a
+pOpts (SubParsers ps) [] a = Error ["One of these subcommands required: " +++ join ", " (map fst ps)]
+pOpts (Flags fs) [arg:args] a
+ | not (startsWith "--" arg) = Ok (a, [arg:args])
+ = case find (\(l,p)->"--" +++ l == arg) fs of
+ Nothing = Error ["Unrecognized option: " +++ arg]
+ Just (l, p) = p args a >>= \(a, args)->pOpts (Flags fs) args a
+pOpts (BinaryFlag yes no) args a
+ = pOpts (Positionals [("BOOL", \s v->
+ if (s == "True")
+ (Ok (yes v))
+ (if (s == "False")
+ (Ok (no v))
+ (Error ["Not True or False"])
+ )
+ )]) args a
+pOpts t args a = Ok (a, args)
+
+pHelp :: (Opt a) -> [String]
+pHelp (Positionals []) = []
+pHelp (Positionals [(i, _):ps]) = [i, " ":pHelp $ Positionals ps]
+pHelp (SubParsers ps) =
+ flatten
+ [[n, " ":pHelp opt] ++ ["\n"]
+ \\(n, opt)<-ps
+ ]
+pHelp (Flags fs) =
+ ["Flags\n"
+ :
+ flatten
+ [["--",f, "\n"]
+ \\(f, p)<-fs
+ ]
+ ]
+
+:: T =
+ { field :: (Int,Int)
+ , field2 :: String
+ , t2 :: C
+ }
+:: T2 = {f :: Int, f2 :: Bool}
+:: C = A Int | B | C Bool
+
+:: ADT
+ = ADT1
+ | ADT2 Int String
+
+derive binumap Opt, [], (,), MaybeError
+derive gopt T, T2, ADT, C
+
+Start w
+# ([argv0:args], w) = getCommandLine w
+//= pHelp opt
+= parseOpts args {field=(0, 0),field2="",t2=A 4}
+
+opt :: Opt T
+opt = gopt{|*|}
repositories / clean-tests.git / blobdiff