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* Re: c++/10852: Old for-scoping rules improperly used?
@ 2003-05-19  8:32 Gabriel Dos Reis
  0 siblings, 0 replies; 3+ messages in thread
From: Gabriel Dos Reis @ 2003-05-19  8:32 UTC (permalink / raw)
  To: nobody; +Cc: gcc-prs

The following reply was made to PR c++/10852; it has been noted by GNATS.

From: Gabriel Dos Reis <gdr@integrable-solutions.net>
To: derrick@cco.caltech.edu
Cc: gcc-gnats@gcc.gnu.org
Subject: Re: c++/10852: Old for-scoping rules improperly used?
Date: 19 May 2003 10:15:54 +0200

 derrick@cco.caltech.edu writes:
 
 | I think this is a bug in g++; but there is always the possibility that it is a bug in my understanding of C++. In the following code gcc assumes that the variable i at the end of function is the same as in the for loop and produces the following error:
 | nstest.cc: In function `void f()':
 | nstest.cc:9: error: name lookup of `i' changed for new ISO `for' scoping
 | nstest.cc:6: error:   using obsolete binding at `i'
 
 That is a bug in the compiler.
 
 The compiler should first look into X before complaining.
 
 -- Gaby


^ permalink raw reply	[flat|nested] 3+ messages in thread
* Re: c++/10852: Old for-scoping rules improperly used?
@ 2003-05-19 14:12 bangerth
  0 siblings, 0 replies; 3+ messages in thread
From: bangerth @ 2003-05-19 14:12 UTC (permalink / raw)
  To: derrick, gcc-bugs, gcc-prs, nobody

Synopsis: Old for-scoping rules improperly used?

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Mon May 19 14:12:47 2003
State-Changed-Why:
    Gaby analyzed this. Interesting bug :-)

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=10852


^ permalink raw reply	[flat|nested] 3+ messages in thread
* c++/10852: Old for-scoping rules improperly used?
@ 2003-05-19  7:46 derrick
  0 siblings, 0 replies; 3+ messages in thread
From: derrick @ 2003-05-19  7:46 UTC (permalink / raw)
  To: gcc-gnats


>Number:         10852
>Category:       c++
>Synopsis:       Old for-scoping rules improperly used?
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Mon May 19 07:46:00 UTC 2003
>Closed-Date:
>Last-Modified:
>Originator:     Derrick Bass
>Release:        gcc-3.3
>Organization:
>Environment:

>Description:
I think this is a bug in g++; but there is always the possibility that it is a bug in my understanding of C++. In the following code gcc assumes that the variable i at the end of function is the same as in the for loop and produces the following error:
nstest.cc: In function `void f()':
nstest.cc:9: error: name lookup of `i' changed for new ISO `for' scoping
nstest.cc:6: error:   using obsolete binding at `i'

I think it should use the variable i from inside the namespace and quit complaining, but as I said, I may just be misunderstanding C++ arcana.

Here's the sample code...
namespace X {
  int i;
}

void f() {
  for (int i=0; i<10; ++i)
    ;
  using namespace X;
  i;
}
>How-To-Repeat:

>Fix:
Workaround is to replace "using namespace X" with "using X::i"
>Release-Note:
>Audit-Trail:
>Unformatted:


^ permalink raw reply	[flat|nested] 3+ messages in thread

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2003-05-19  8:32 c++/10852: Old for-scoping rules improperly used? Gabriel Dos Reis
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2003-05-19 14:12 bangerth
2003-05-19  7:46 derrick

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