RE: [boost] Proposal: Logging library

From: Dale Peakall (dale.peakall_at_[hidden])
Date: 2002-04-09 04:07:21

> > Please not that ugly format string again! Streams was invented to get
> > out of this cryptic, type-unsafe and processor-time-consuming feature,
> > so why not just to:
> > 
> > log << log_debug << log_errno() << " config file not found";
> 
> Which is more readable?
> 
> cout << "CPU " << cpu_number << " (mem" << free_mem << "): 
> multiply " << rows << " X " << cols << " matrix, mode = " << "'" << 
> transpose_mode << "'" << endl;
> 
> versus
> 
> printf("CPU %d (mem %d): multiply %d X %d matrix, mode = '%c'\n",
>     cpu_number, free_mem, rows, cols, transpose_mode);
> 
> Personally, I think the latter.

The point is that it's not type safe.  On numerous occassions I've
turned up the logging level on a library using printf style format
specifiers to attempt to diagnose a problem, only for the whole
system to crash because there's a dodgy format string.

On the subject of other requirements, there's a need to support
many sinks: files, syslog, nt event log all spring to mind, there's
need for both logging levels and multiple