std.experimental.logger formal review round 3

[Dicebot via Digitalmars-d]

On Monday, 27 October 2014 at 20:42:10 UTC, Martin Nowak wrote:
> Say I want to add tracing/logging to 
> [`parseJson`](http://dlang.org/library/std/json/parseJSON.html) 
> or 
> [`findRoot`](http://dlang.org/phobos/std_numeric.html#.findRoot)

This is exactly what is wrong :) Using std.logger inside Phobos 
itself is a big no. Actually even finding yourself in position 
where you may want to do it indicates some Phobos design issue.