Colog.Core

SPDX-License-Identifier : MPL-2.0 Maintainer : Co-Log xrom.xkov@gmail.com Stability : Stable Portability : Portable

Exports all core functionality. co-log-core is a lightweight package that defines only core data type and various combinators to work with it.

Fundamentals of co-log-core are based on the following data type:

newtype LogAction m msg = LogAction
    { unLogAction :: msg -> m ()
    }

This data type provides extremely composable and flexible interface by having many instances of the standard algebraic data types.

The package has the following structure:

• Colog.Core.Action: definition of the main data type and its combinators.

• Colog.Core.Class: HasLog typeclass that describes how different values (e.g. application environment) can store and modify LogAction.

• Colog.Core.IO: basic loggers that work with MonadIO and String.

• Colog.Core.Severity: logger severity.