| Copyright | Copyright (C) 2005-2011 John Goerzen |
|---|---|
| License | BSD-3-Clause |
| Stability | stable |
| Portability | portable |
| Safe Haskell | Safe |
| Language | Haskell2010 |
Data.Maybe.Utils
Description
Utilities for working with the Maybe data type.
Synopsis
- 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.
Alias of fromJust.
forceMaybeMsg :: String -> Maybe a -> a Source #
Like forceMaybe, but lets you customize the error message raised if
Nothing is supplied.