|
Foreign.Marshal.Error | Portability | portable | Stability | provisional | Maintainer | ffi@haskell.org |
|
|
|
Description |
Routines for testing return values and raising a userError exception
in case of values indicating an error state.
|
|
Synopsis |
|
|
|
Documentation |
|
|
:: (a -> Bool) | error condition on the result of the IO action
| -> (a -> String) | computes an error message from erroneous results
of the IO action
| -> IO a | the IO action to be executed
| -> IO a | | Execute an IO action, throwing a userError if the predicate yields
True when applied to the result returned by the IO action.
If no exception is raised, return the result of the computation.
|
|
|
|
Like throwIf, but discarding the result
|
|
|
Guards against negative result values
|
|
|
Like throwIfNeg, but discarding the result
|
|
|
Guards against null pointers
|
|
|
Discard the return value of an IO action
|
|
Produced by Haddock version 0.9 |