[Bug c++/44333] New: Ambiguity with typedef and using namespace

[Bug c++/44333] New: Ambiguity with typedef and using namespace

[paolo dot carlini at oracle dot com]

I would really like this to be possible, would help me a lot in getting rid of
<cstddef> uses in the library, and it is indeed possible with ICC and Comeau,
and SunStudio, but GCC doesn't like it, for some reason.

typedef unsigned my_size_t;

namespace my
{
  typedef unsigned my_size_t;
}

using namespace my;
my_size_t    s1;  // error

namespace my2
{
  using namespace my;
  my_size_t  s1;  // error
}

I'm pretty sure to have seen it already, still... Jason what do you think?


-- 
           Summary: Ambiguity with typedef and using namespace
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: paolo dot carlini at oracle dot com


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44333

[Bug c++/44333] Ambiguity with typedef and using namespace

[paolo dot carlini at oracle dot com]

------- Comment #1 from paolo dot carlini at oracle dot com  2010-05-30 15:54 -------
And replacing both:

  using namespace my;

with

  using my::my_size_t;

instead works. This is crazy (IMHO ;) and would not be a workaround for me)


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|4.5.0                       |4.6.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44333

[Bug c++/44333] Ambiguity with typedef and using namespace

[paolo dot carlini at oracle dot com]

------- Comment #2 from paolo dot carlini at oracle dot com  2010-06-02 17:37 -------
So it's already known...

*** This bug has been marked as a duplicate of 23594 ***


-- 

paolo dot carlini at oracle dot com changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
         Resolution|                            |DUPLICATE


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44333

[Bug c++/44333] Ambiguity with typedef and using namespace

[jason at gcc dot gnu dot org]

------- Comment #3 from jason at gcc dot gnu dot org  2010-06-02 19:19 -------
Subject: Bug 44333

Author: jason
Date: Wed Jun  2 19:19:05 2010
New Revision: 160183

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=160183
Log:
        PR c++/44333
        * name-lookup.c (same_entity_p): New.
        (ambiguous_decl): Multiple declarations of the same entity
        are not ambiguous.

Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/name-lookup.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/tc1/dr101.C


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44333

[Bug c++/44333] Ambiguity with typedef and using namespace

[paolo dot carlini at oracle dot com]

------- Comment #4 from paolo dot carlini at oracle dot com  2010-06-02 20:26 -------
Thanks!


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=44333