File: Exception.hs

package info (click to toggle)
git-annex 3.20120629
  • links: PTS
  • area: main
  • in suites: wheezy
  • size: 6,000 kB
  • sloc: haskell: 12,228; makefile: 93; ansic: 84; perl: 37; sh: 10
file content (27 lines) | stat: -rw-r--r-- 725 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
{- exception handling in the git-annex monad
 -
 - Copyright 2011 Joey Hess <joey@kitenet.net>
 -
 - Licensed under the GNU GPL version 3 or higher.
 -}

module Annex.Exception (
	bracketIO,
	handle,
	throw,
) where

import Control.Exception.Lifted (handle)
import Control.Monad.Trans.Control (liftBaseOp)
import Control.Exception hiding (handle, throw)

import Common.Annex

{- Runs an Annex action, with setup and cleanup both in the IO monad. -}
bracketIO :: IO c -> (c -> IO b) -> Annex a -> Annex a
bracketIO setup cleanup go =
	liftBaseOp (Control.Exception.bracket setup cleanup) (const go)

{- Throws an exception in the Annex monad. -}
throw :: Control.Exception.Exception e => e -> Annex a
throw = liftIO . throwIO