Safe Haskell | Safe-Inferred |
---|---|
Language | Haskell98 |
Provides Data.IORef.modifyIORef'
for base < 4.6
.
- module Data.IORef
- readModifyIORef' :: IORef a -> (a -> a) -> IO a
Documentation
module Data.IORef
readModifyIORef' :: IORef a -> (a -> a) -> IO a Source
Read IORef
, modify it strictly, and return old value.