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Merge pull request #1758 from cdepillabout/change-monad-logger-to-newtype

Change Logger datatype into a newtype

commitcb1c755dc8307eb7d29ad307e206a21dc0fc2b06 authorPhil Freeman <paf31@cantab.net> dateMon 18 Jan 2016, 10:30 (11 years ago) parentcb924d74961b37
2 files changed+2−1
compare with golang
unifiedsplit
CONTRIBUTORS.md+1 src/Control/Monad/Logger.hs+1−1
CONTRIBUTORS.md+1
@@ -12,6 +12,7 @@ This file lists the contributors to the PureScript compiler project, and the ter
1212- [@balajirrao](https://github.com/balajirrao) (Balaji Rao) - My existing contributions and all future contributions until further notice are Copyright Balaji Rao, and are licensed to the owners and users of the PureScript compiler project under the terms of the MIT license.
1313- [@bergmark](https://github.com/bergmark) (Adam Bergmark) - My existing contributions and all future contributions until further notice are Copyright Adam Bergmark, and are licensed to the owners and users of the PureScript compiler project under the terms of the MIT license.
1414- [@Bogdanp](https://github.com/Bogdanp) (Bogdan Paul Popa) My existing contributions and all future contributions until further notice are Copyright Bogdan Paul Popa, and are licensed to the owners and users of the PureScript compiler project under the terms of the [MIT license](http://opensource.org/licenses/MIT).
15+- [@cdepillabout](https://github.com/cdepillabout) (Dennis Gosnell) My existing contributions and all future contributions until further notice are Copyright Dennis Gosnell, and are licensed to the owners and users of the PureScript compiler project under the terms of the [MIT license](http://opensource.org/licenses/MIT).
1516- [@davidchambers](https://github.com/davidchambers) (David Chambers) My existing contributions and all future contributions until further notice are Copyright David Chambers, and are licensed to the owners and users of the PureScript compiler project under the terms of the [MIT license](http://opensource.org/licenses/MIT).
1617- [@dckc](https://github.com/dckc) (Dan Connolly) My existing contributions and all future contributions until further notice are Copyright Dan Connolly, and are licensed to the owners and users of the PureScript compiler project under the terms of the [MIT license](http://opensource.org/licenses/MIT).
1718- [@dylex](https://github.com/dylex) (Dylan Simon) My existing and all future contributions to the PureScript compiler until further notice are Copyright Dylan Simon, and are licensed to the owners and users of the PureScript compiler project under the terms of the [MIT license](http://opensource.org/licenses/MIT).
src/Control/Monad/Logger.hs+1−1
@@ -30,7 +30,7 @@ import Control.Monad.Base (MonadBase(..))
3030import Control.Monad.Trans.Control (MonadBaseControl(..))
3131
3232-- | A replacement for WriterT IO which uses mutable references.
33−data Logger w a = Logger { runLogger :: IORef w -> IO a }
33+newtype Logger w a = Logger { runLogger :: IORef w -> IO a }
3434
3535-- | Run a Logger computation, starting with an empty log.
3636runLogger' :: (Monoid w) => Logger w a -> IO (a, w)