c++/2298: imported namespace variables not visible

[franke dot daniel at gmail dot com]

>Number:         2298
>Category:       c++
>Synopsis:       imported namespace variables not visible
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          change-request
>Submitter-Id:   net
>Arrival-Date:   Sat Aug 11 22:48:01 UTC 2007
>Closed-Date:
>Last-Modified:
>Originator:     franke.daniel@gmail.com
>Release:        gdb-6.6
>Organization:
>Environment:

>Description:
A variable imported from a namespace is not accessible as one would expect.

While this the problem is easily circumvented in C++, it may be difficult to do with fortran. See [1] for problems to be fixed in the fortran-frontend of gcc before this might become an issue.

[1] http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29635#c3
>How-To-Repeat:
$> cat a.cpp
#include <cstdio>

namespace foo {
  int i = 42;
}

int main() {
  using foo::i;

  printf("%d\n", i);
  return 0;
}

$> g++ -g a.cpp
$> gdb a.out
GNU gdb 6.6
[...]
This GDB was configured as "i686-pc-linux-gnu"...
Using host libthread_db library "/lib/libthread_db.so.1".
(gdb) break 10
Breakpoint 1 at 0x8048495: file a.cpp, line 10.
(gdb) run
Starting program: /home/daniel/pr/a.out

Breakpoint 1, main () at a.cpp:10
10        printf("%d\n", i);
(gdb) print i
No symbol "i" in current context.
(gdb) print foo::i
$1 = 42
>Fix:

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