# om-logging
This package provides various combinators for composing loggers for use
with the [monad-logger](https://hackage.haskell.org/package/monad-logger)
package.
It also provides an opinion about what a good log message looks like.
For instance, the opinionated "standard" log format is defined using
the other combinators:
```haskell
{- |
Log to the indicated destination, applying the "standard" filters
and formats.
-}
withStandardFormat
:: LogLevel {- ^ The minimum log level that will be logged. -}
-> (Loc -> LogSource -> LogLevel -> LogStr -> IO ()) {- ^ The base logger. -}
-> Loc
-> LogSource
-> LogLevel
-> LogStr
-> IO ()
withStandardFormat logLevel =
filterLogging (levelFilter logLevel)
. withPrefix ": "
. withThread
. withPackage
. withLevel
. withTime
```