-----------------------------------------------------------------------------
module CmdLineParser (
- processArgs, OptKind(..),
- CmdLineP(..), getCmdLineState, putCmdLineState
+ processArgs, OptKind(..),
+ CmdLineP(..), getCmdLineState, putCmdLineState,
+ Flag(..), Deprecated(..),
+ errorsToGhcException
) where
#include "HsVersions.h"
-import Util ( maybePrefixMatch, notNull, removeSpaces )
-#ifdef DEBUG
-import Panic ( assertPanic )
-#endif
-
-data OptKind m -- Suppose the flag is -f
- = NoArg (m ()) -- -f all by itself
- | HasArg (String -> m ()) -- -farg or -f arg
- | SepArg (String -> m ()) -- -f arg
- | Prefix (String -> m ()) -- -farg
- | OptPrefix (String -> m ()) -- -f or -farg (i.e. the arg is optional)
- | OptIntSuffix (Maybe Int -> m ()) -- -f or -f=n; pass n to fn
- | IntSuffix (Int -> m ()) -- -f or -f=n; pass n to fn
- | PassFlag (String -> m ()) -- -f; pass "-f" fn
- | AnySuffix (String -> m ()) -- -f or -farg; pass entire "-farg" to fn
- | PrefixPred (String -> Bool) (String -> m ())
- | AnySuffixPred (String -> Bool) (String -> m ())
-
+import Util
+import Outputable
+import Panic
+import SrcLoc
+
+data Flag m = Flag
+ {
+ flagName :: String, -- flag, without the leading -
+ flagOptKind :: (OptKind m), -- what to do if we see it
+ flagDeprecated :: Deprecated -- is the flag deprecated?
+ }
+
+data Deprecated = Supported | Deprecated String
+
+data OptKind m -- Suppose the flag is -f
+ = NoArg (m ()) -- -f all by itself
+ | HasArg (String -> m ()) -- -farg or -f arg
+ | SepArg (String -> m ()) -- -f arg
+ | Prefix (String -> m ()) -- -farg
+ | OptPrefix (String -> m ()) -- -f or -farg (i.e. the arg is optional)
+ | OptIntSuffix (Maybe Int -> m ()) -- -f or -f=n; pass n to fn
+ | IntSuffix (Int -> m ()) -- -f or -f=n; pass n to fn
+ | PassFlag (String -> m ()) -- -f; pass "-f" fn
+ | AnySuffix (String -> m ()) -- -f or -farg; pass entire "-farg" to fn
+ | PrefixPred (String -> Bool) (String -> m ())
+ | AnySuffixPred (String -> Bool) (String -> m ())
+
processArgs :: Monad m
- => [(String, OptKind m)] -- cmdline parser spec
- -> [String] -- args
- -> m (
- [String], -- spare args
- [String] -- errors
- )
-processArgs spec args = process spec args [] []
+ => [Flag m] -- cmdline parser spec
+ -> [Located String] -- args
+ -> m (
+ [Located String], -- spare args
+ [Located String], -- errors
+ [Located String] -- warnings
+ )
+processArgs spec args = process spec args [] [] []
where
- process _spec [] spare errs =
- return (reverse spare, reverse errs)
-
- process spec (dash_arg@('-':arg):args) spare errs =
+ process _spec [] spare errs warns =
+ return (reverse spare, reverse errs, reverse warns)
+
+ process spec (locArg@(L loc dash_arg@('-' : arg)) : args) spare errs warns =
case findArg spec arg of
- Just (rest,action) ->
- case processOneArg action rest arg args of
- Left err -> process spec args spare (err:errs)
- Right (action,rest) -> action >> process spec rest spare errs
- Nothing -> process spec args (dash_arg:spare) errs
-
- process spec (arg:args) spare errs =
- process spec args (arg:spare) errs
-
-
-processOneArg :: OptKind m -> String -> String -> [String]
- -> Either String (m (), [String])
-processOneArg action rest arg args
+ Just (rest, action, deprecated) ->
+ let warns' = case deprecated of
+ Deprecated warning ->
+ L loc ("Warning: " ++ dash_arg ++ " is deprecated: " ++ warning) : warns
+ Supported -> warns
+ in case processOneArg action rest arg args of
+ Left err -> process spec args spare (L loc err : errs) warns'
+ Right (action,rest) -> do action
+ process spec rest spare errs warns'
+ Nothing -> process spec args (locArg : spare) errs warns
+
+ process spec (arg : args) spare errs warns =
+ process spec args (arg : spare) errs warns
+
+
+processOneArg :: OptKind m -> String -> String -> [Located String]
+ -> Either String (m (), [Located String])
+processOneArg action rest arg args
= let dash_arg = '-' : arg
- rest_no_eq = dropEq rest
+ rest_no_eq = dropEq rest
in case action of
- NoArg a -> ASSERT(null rest) Right (a, args)
+ NoArg a -> ASSERT(null rest) Right (a, args)
+
+ HasArg f | notNull rest_no_eq -> Right (f rest_no_eq, args)
+ | otherwise -> case args of
+ [] -> missingArgErr dash_arg
+ (L _ arg1:args1) -> Right (f arg1, args1)
+
+ SepArg f -> case args of
+ [] -> unknownFlagErr dash_arg
+ (L _ arg1:args1) -> Right (f arg1, args1)
- HasArg f | notNull rest_no_eq -> Right (f rest_no_eq, args)
- | otherwise -> case args of
- [] -> missingArgErr dash_arg
- (arg1:args1) -> Right (f arg1, args1)
+ Prefix f | notNull rest_no_eq -> Right (f rest_no_eq, args)
+ | otherwise -> unknownFlagErr dash_arg
- SepArg f -> case args of
- [] -> unknownFlagErr dash_arg
- (arg1:args1) -> Right (f arg1, args1)
+ PrefixPred _ f | notNull rest_no_eq -> Right (f rest_no_eq, args)
+ | otherwise -> unknownFlagErr dash_arg
- Prefix f | notNull rest_no_eq -> Right (f rest_no_eq, args)
- | otherwise -> unknownFlagErr dash_arg
-
- PrefixPred p f | notNull rest_no_eq -> Right (f rest_no_eq, args)
- | otherwise -> unknownFlagErr dash_arg
-
- PassFlag f | notNull rest -> unknownFlagErr dash_arg
- | otherwise -> Right (f dash_arg, args)
+ PassFlag f | notNull rest -> unknownFlagErr dash_arg
+ | otherwise -> Right (f dash_arg, args)
- OptIntSuffix f | null rest -> Right (f Nothing, args)
- | Just n <- parseInt rest_no_eq -> Right (f (Just n), args)
- | otherwise -> Left ("malformed integer argument in " ++ dash_arg)
+ OptIntSuffix f | null rest -> Right (f Nothing, args)
+ | Just n <- parseInt rest_no_eq -> Right (f (Just n), args)
+ | otherwise -> Left ("malformed integer argument in " ++ dash_arg)
- IntSuffix f | Just n <- parseInt rest_no_eq -> Right (f n, args)
- | otherwise -> Left ("malformed integer argument in " ++ dash_arg)
+ IntSuffix f | Just n <- parseInt rest_no_eq -> Right (f n, args)
+ | otherwise -> Left ("malformed integer argument in " ++ dash_arg)
- OptPrefix f -> Right (f rest_no_eq, args)
- AnySuffix f -> Right (f dash_arg, args)
- AnySuffixPred p f -> Right (f dash_arg, args)
+ OptPrefix f -> Right (f rest_no_eq, args)
+ AnySuffix f -> Right (f dash_arg, args)
+ AnySuffixPred _ f -> Right (f dash_arg, args)
-findArg :: [(String,OptKind a)] -> String -> Maybe (String,OptKind a)
+findArg :: [Flag m] -> String -> Maybe (String, OptKind m, Deprecated)
findArg spec arg
- = case [ (removeSpaces rest, k)
- | (pat,k) <- spec,
- Just rest <- [maybePrefixMatch pat arg],
- arg_ok k rest arg ]
+ = case [ (removeSpaces rest, optKind, flagDeprecated flag)
+ | flag <- spec,
+ let optKind = flagOptKind flag,
+ Just rest <- [maybePrefixMatch (flagName flag) arg],
+ arg_ok optKind rest arg ]
of
- [] -> Nothing
- (one:_) -> Just one
-
-arg_ok (NoArg _) rest arg = null rest
-arg_ok (HasArg _) rest arg = True
-arg_ok (SepArg _) rest arg = null rest
-arg_ok (Prefix _) rest arg = notNull rest
-arg_ok (PrefixPred p _) rest arg = notNull rest && p (dropEq rest)
-arg_ok (OptIntSuffix _) rest arg = True
-arg_ok (IntSuffix _) rest arg = True
-arg_ok (OptPrefix _) rest arg = True
-arg_ok (PassFlag _) rest arg = null rest
-arg_ok (AnySuffix _) rest arg = True
-arg_ok (AnySuffixPred p _) rest arg = p arg
+ [] -> Nothing
+ (one:_) -> Just one
+
+arg_ok :: OptKind t -> [Char] -> String -> Bool
+arg_ok (NoArg _) rest _ = null rest
+arg_ok (HasArg _) _ _ = True
+arg_ok (SepArg _) rest _ = null rest
+arg_ok (Prefix _) rest _ = notNull rest
+arg_ok (PrefixPred p _) rest _ = notNull rest && p (dropEq rest)
+arg_ok (OptIntSuffix _) _ _ = True
+arg_ok (IntSuffix _) _ _ = True
+arg_ok (OptPrefix _) _ _ = True
+arg_ok (PassFlag _) rest _ = null rest
+arg_ok (AnySuffix _) _ _ = True
+arg_ok (AnySuffixPred p _) _ arg = p arg
parseInt :: String -> Maybe Int
-- Looks for "433" or "=342", with no trailing gubbins
--- n or =n => Just n
+-- n or =n => Just n
-- gibberish => Nothing
parseInt s = case reads s of
- ((n,""):_) -> Just n
- other -> Nothing
+ ((n,""):_) -> Just n
+ _ -> Nothing
dropEq :: String -> String
-- Discards a leading equals sign
newtype CmdLineP s a = CmdLineP { runCmdLine :: s -> (a, s) }
instance Monad (CmdLineP s) where
- return a = CmdLineP $ \s -> (a, s)
- m >>= k = CmdLineP $ \s -> let
- (a, s') = runCmdLine m s
- in runCmdLine (k a) s'
+ return a = CmdLineP $ \s -> (a, s)
+ m >>= k = CmdLineP $ \s -> let
+ (a, s') = runCmdLine m s
+ in runCmdLine (k a) s'
+getCmdLineState :: CmdLineP s s
getCmdLineState = CmdLineP $ \s -> (s,s)
+putCmdLineState :: s -> CmdLineP s ()
putCmdLineState s = CmdLineP $ \_ -> ((),s)
+
+-- ---------------------------------------------------------------------
+-- Utils
+
+errorsToGhcException :: [Located String] -> GhcException
+errorsToGhcException errs =
+ let errors = vcat [ ppr l <> text ": " <> text e | L l e <- errs ]
+ in UsageError (showSDoc errors)
+
projects / ghc-hetmet.git / blobdiff