c++/3926: Trouble with namespaces

c++/3926: Trouble with namespaces

[reichelt]

>Number:         3926
>Category:       c++
>Synopsis:       Trouble with namespaces
>Confidential:   no
>Severity:       serious
>Priority:       low
>Responsible:    unassigned
>State:          open
>Class:          accepts-illegal
>Submitter-Id:   net
>Arrival-Date:   Fri Aug 03 10:16:01 PDT 2001
>Closed-Date:
>Last-Modified:
>Originator:     Volker Reichelt
>Release:        gcc 2.95.3, gcc 3.0
>Organization:
>Environment:
i686-pc-linux-gnu, mips-sgi-irix6.5
>Description:
The following illegal code (the function "f" should not
be visible in thge global namespace) compiles without
errors using g++ 3.0 or 2.95.3:

namespace ZZZ
{
  struct T {};
  void f (T) {}
}

void g() { ZZZ::T x; f(x); }

The bug seems to be platform independant and
might be related to PR 2127.
>How-To-Repeat:
g++ -c Bug.cpp
>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:

Re: c++/3926: Trouble with namespaces

[pme]

Synopsis: Trouble with namespaces

State-Changed-From-To: open->closed
State-Changed-By: pme
State-Changed-When: Fri Aug  3 10:34:38 2001
State-Changed-Why:
    Thank you for your bug report.
    
    Not only is this /not/ a bug in the compiler, the example
    you give is almost identical to the one given in the ISO
    C++ standard, when they explain why such code must work
    this way.
    
    This is called argument-dependant name lookup, or "Koenig
    lookup," described in [3.4.2].  The code you gave is
    almost an exact duplicate of the example in [3.4.2]/2.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view&pr=3926&database=gcc