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| Foreign.Marshal.Error | | Portability | portable | | Stability | provisional | | Maintainer | ffi@haskell.org |
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| Contents |
- Error utilities
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| Description |
| Marshalling support: Handling of common error conditions
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| Synopsis |
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| Error utilities |
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| Throw an exception on specific return values
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| throwIf :: (a -> Bool) -> (a -> String) -> IO a -> IO a |
Guard an IO operation and throw an exception if the result meets the given
predicate - the second argument computes an error message from the result of the IO
operation
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| throwIf_ :: (a -> Bool) -> (a -> String) -> IO a -> IO () |
| Like throwIf, but discarding the result
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| throwIfNeg :: (Ord a, Num a) => (a -> String) -> IO a -> IO a |
| Guards against negative result values
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| throwIfNeg_ :: (Ord a, Num a) => (a -> String) -> IO a -> IO () |
| Like throwIfNeg, but discarding the result
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| throwIfNull :: String -> IO (Ptr a) -> IO (Ptr a) |
| Guards against null pointers
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| void :: IO a -> IO () |
| Discard the return value of an IO action
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| Produced by Haddock version 0.4 |