yet-another-logger

A logging framework written with flexibility and performance in mind. This Version is yet a preview The logging system consists of four main parts: The logging front-end are those types and functions that are used to produce log messages in the code. This includes the LogLevel type, the LogPolicy type, the LogLabel and LogScope types, the LogFunction type, and the MonadLog type class. The abstract LoggerCtx is the context through which the LogFunction delivers log messages to the logger back-end. The formatter is a function for serializing log messages. The logger back-end is a callback that is invoked by Logger on each log messages. The logger back-end applies the formatting function and delivers the log messages to some sink. The framework allows to combine this components in a modular way. The front-end types, the Logger, and the back-end callback are represented by types or type classes. The formatter exists only as a concept in the implementation of back-ends. These types and concepts together form the abstract logger interface that is defined in the module System.Logger.Types. The package also provides a concrete Logger that implements these components in the module System.Logger.Logger and System.Logger.Backend.Handle