| Copyright | Copyright (C) 2005-2011 John Goerzen |
|---|---|
| License | BSD3 |
| Maintainer | John Goerzen <jgoerzen@complete.org> |
| Stability | provisional |
| Portability | portable |
| Safe Haskell | None |
| Language | Haskell98 |
Data.Maybe.Utils
Description
Utilities for working with the Either data type
- forceMaybe :: Maybe a -> a
- forceMaybeMsg :: String -> Maybe a -> a
Documentation
forceMaybe :: Maybe a -> a Source
Pulls a Just value out of a Maybe value. If the Maybe value is Nothing, raises an exception with error.
forceMaybeMsg :: String -> Maybe a -> a Source
Like forceMaybe, but lets you customize the error message raised if
Nothing is supplied.