[boost] Re: Logging Library -- Formal Review Request

From: Andrei Alexandrescu (See Website For Email) (SeeWebsiteForEmail_at_[hidden])
Date: 2005-04-25 14:30:47

John Torjo wrote:
> 
>>
>> Hi. If I understand right the code, even if log is disabled, I do pay 
>> for constructing
>> log messages. Am I right? If so why do you force this?
> 
> 
> No, you donot pay.
> 
> BOOST_LOG(app) << "testing " << i << '-' << j << '-' << k;
> 
> Is the equivalent of:
> 
> if ( is_log_enabled(app) ) app_log() << "testing" << i ...;

Hopefully the actual expansion uses a if/else statement so as to avoid 
wreaking havoc in calling code?

if ( !is_log_enabled(app) ) ; else app_log() << "testing" << i ...;

Andrei