c++/8827: operator<< within namespace shadows all operator<<'s in global namespace

c++/8827: operator<< within namespace shadows all operator<<'s in global namespace

[dhawkins]

>Number:         8827
>Category:       c++
>Synopsis:       operator<< within namespace shadows all operator<<'s in global namespace
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Dec 05 11:46:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     dhawkins@cdrgts.com
>Release:        g++-3.2 (GCC) 3.2.1
>Organization:
>Environment:
Debian GNU/Linux Sarge with g++ from Sid (Athlon 800).
>Description:

>How-To-Repeat:
compile the code
>Fix:
I have demonstrated work-arounds, but do not know of any fixes.
>Release-Note:
>Audit-Trail:
>Unformatted:
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Re: c++/8827: operator<< within namespace shadows all operator<<'s in global namespace

[bangerth]

Synopsis: operator<< within namespace shadows all operator<<'s in global namespace

State-Changed-From-To: open->closed
State-Changed-By: bangerth
State-Changed-When: Thu Dec  5 11:57:05 2002
State-Changed-Why:
    This is not a bug, but how Koenig lookup works. If there
    is nothing in the present namespace, then we look into
    the namespaces of the arguments of the operator, which
    triggers the message.
    
    There are a number of similar reports in the database.
    
    If you know which operator you want to call, then qualify
    it with the name of the namespace. 
    
    Regards
      Wolfgang

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=8827