plans for macros

[BCS]

Reply to Steven,

> If I have a log object, and that log object is supposed to evaluate
> its arguments only if the logging level allows it, checked at runtime.
> 

as a bit of an aside: this can be done using lazy


void Log(uint level)(lazy char[] str)
{
  if(current > level) RealLog.output(str());
}

alias Log!(Critical) CriticalLog;
...
alias Log!(Debug) DebugLog;