std.experimental.logger formal review round 3

[Martin Nowak via Digitalmars-d]

On 10/27/2014 12:45 AM, Martin Nowak wrote:
> If you allow to define a Logger with a LogLevel know at compile time and
> you statically pass the LogLevel of your message to the logging function
> you can elide that call. For anything else you need a runtime check.

You are trying to globally define a LogLevel through the version 
identifier but that collides with D's separate compilation.
So you cannot enable logging in a library that was compiled with 
StdLoggerDisableLogging. And vice versa you cannot statically disable 
logging in a library compiled without StdLoggerDisableLogging.

Now if you use StdLoggerDisableLogging in your program the effect on the 
library will depend on whether or not you're calling a templated 
function or if the compiler inlined certain library function into your 
program.