std.experimental.logger formal review round 3

[Robert burner Schadek via Digitalmars-d]

On Sunday, 12 October 2014 at 09:07:37 UTC, Jacob Carlborg wrote:
> On 2014-10-11 15:34, Robert burner Schadek wrote:
>
>>> - Why do loggers have to be classes?
>> As answered multiply times before, to build log hierarchies.
>
> What's stopping an interface or class to implement a logging 
> concept?

Same as last time:
Logger[], Logger without a LogLevel not real useful IMO, (new) no 
thread safety by default