diff options
Diffstat (limited to 'src/compiler/GF/Infra/Option.hs')
| -rw-r--r-- | src/compiler/GF/Infra/Option.hs | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/src/compiler/GF/Infra/Option.hs b/src/compiler/GF/Infra/Option.hs index c4108cbe3..20e625114 100644 --- a/src/compiler/GF/Infra/Option.hs +++ b/src/compiler/GF/Infra/Option.hs @@ -547,7 +547,7 @@ lookupShow xs z = fromMaybe "lookupShow" $ lookup z [(y,x) | (x,y) <- xs] lookupReadsPrec :: [(String,a)] -> Int -> ReadS a lookupReadsPrec xs _ s = [(z,rest) | (x,rest) <- lex s, (y,z) <- xs, y == x] -onOff :: Monad m => (Bool -> m a) -> Bool -> ArgDescr (m a) +onOff :: MonadFail m => (Bool -> m a) -> Bool -> ArgDescr (m a) onOff f def = OptArg g "[on,off]" where g ma = maybe (return def) readOnOff ma >>= f readOnOff x = case map toLower x of @@ -555,7 +555,7 @@ onOff f def = OptArg g "[on,off]" "off" -> return False _ -> fail $ "Expected [on,off], got: " ++ show x -readOutputFormat :: Monad m => String -> m OutputFormat +readOutputFormat :: MonadFail m => String -> m OutputFormat readOutputFormat s = maybe (fail $ "Unknown output format: " ++ show s) return $ lookup s outputFormats |