Batteries user guide : BatLog.Easy

# Module BatLog.Easy

    module Easy: sig .. end

A simple-to-use logger with verbosity levels that outputs by default to stderr (changeable at runtime) with the date and time at the beginning of each log message.
Since 2.0

    val level : BatLog.easy_lev Pervasives.ref

Set this ref to the lowest level of log you want logged. For example, `Easy.level := `always` disables all logging except that at the ``always` level. Setting `Easy.level := `info` will enable logging for ``info`, ``warn`, ``error`, ``fatal` and ``always` levels.

Set this ref to the output you want logging messages to go to. Defaults to `stderr`.

    val output : unit BatIO.output Pervasives.ref

    val log : ?fp:string -> BatLog.easy_lev -> string -> unit

`log lev msg` logs the message `msg` if the current logging level is `lev` or lower.

    val logf : ?fp:string ->
           BatLog.easy_lev -> ('a, unit BatIO.output, unit) Pervasives.format -> 'a

As `log`, but instead of a string message, a printf format is allowed with whatever arguments are appropriate.