Apache licensed and maintained by Matthew Parsons

Module documentation for 0.1.10

There are no documented modules for this package.


Build Status

This package provides an easy way to add prefixes to any MonadLogger. Here’s a brief example:

{-# LANGUAGE TemplateHaskell #-}

import Control.Monad.Logger
import Control.Monad.Logger.Prefix

main :: IO ()
main = runStdoutLoggingT $ do
    $(logDebug) "This one has no prefix."

    "foo" `prefixLogs` do
        $(logDebug) "This one has a [foo] prefix."

        "bar" `prefixLogs` do
            $(logDebug) "This one has both [foo] and [bar] prefixes."

The package includes a benchmark demonstrating that there is no performance difference with ordinary logging.


Change log


  • Relaxed upper bound on exceptions from 0.10 to 0.11


  • Relaxed upper bound on exceptions from 0.9 to 0.10


  • Relaxed upper bound on conduit
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