Re: [boost] singleton streams?

From: Caleb Epstein (caleb.epstein_at_[hidden])
Date: 2005-02-16 10:44:20

On Tue, 15 Feb 2005 23:11:49 -0500, Jason Hise <chaos_at_[hidden]> wrote:
> 
>  From everything I know, cin, cout, cerr, and clog are simply global
> variables that live in namespace std.  Does this mean that the following
> code is dangerous?

AFAIK yes.  If you have a singleton object that is being destroyed at
exit, it is possible that cin/cout/clog etc have been closed before
Log::~Log is called.

> class Log
> {
> public:
>     Log (  ) { std::clog << "Log created\n"; }
>     ~ Log (  ) { std::clog << "Log destroyed\n"; }
> } global_log;
> 
> If so, (and I know this is presumptuous, so strictly hypothetically
> speaking) could these four standard streams benefit by becoming
> singletons?  Just a thought experiment...

-- 
Caleb Epstein
caleb dot epstein at gmail dot com