[BUG] Tab Expansion for C++

[Thomas Richter <thor@mail.math.tu-berlin.de>]

Hi folks,

the TAB expansion for C++ class members in GDB is - unfortunately - close
to useless. Here's an example how to reproduce the problem:

Type in the following program:

/* snip */

class A {
  //
  int x;
public:
  A(int i)
  {
    x = i;
  }
  ~A(void)
  {
  }
  //
  int getA(void) const
  {
    return x;
  }
};

int main(int argc,char **argv)
{
  A a(5);

  return a.getA();
}

/* snip */

Compile with:

thor@mersenne:~/src> g++-4.1 -O0 -fno-inline -ggdb3 gdbtest.cpp -o gdbtest

Then run GDB:
thor@mersenne:~/src> gdb gdbtest
GNU gdb 6.6
Copyright (C) 2006 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu"...
Using host libthread_db library "/lib/tls/libthread_db.so.1".

Consider finding the constructor of A (clearly, a contrived example)

(gdb) break A::

now type TAB to get the members of A:

A                       __do_global_dtors_aux   char
A::A(int)               __dso_handle            completed.5556
A::getA() const         __fini_array_end        data_start
A::~A()                 __fini_array_start      frame_dummy
_DYNAMIC                __i686.get_pc_thunk.bx  int
_GLOBAL_OFFSET_TABLE_   __init_array_end        long int
_IO_stdin_used          __init_array_start      long long int
__CTOR_END__            __libc_csu_fini         long long unsigned int
__CTOR_LIST__           __libc_csu_init         long unsigned int
__DTOR_END__            __libc_start_main@plt   main
__DTOR_LIST__           _edata                  p.5554
__FRAME_END__           _end                    short int
__JCR_END__             _fini                   short unsigned int
__JCR_LIST__            _fp_hw                  signed char
__bss_start             _init                   unsigned char
__data_start            _start                  unsigned int
__do_global_ctors_aux   call_gmon_start         ~A
(gdb) 

Given that this is really a pretty short program, the output can grow
enourmous for any realistically sized code since *all* functions are
shown here, not only those that are members of A. Interestingly, gdb *does*
know that, as can be seen from the above list.

Could you please, please fix this? It's a long-standing bug, and it's
pretty anoying.

Thanks,
	Thomas