[Bug c++/13592] New: C++ parser regression

["rwgk at yahoo dot com" <gcc-bugzilla at gcc dot gnu dot org>]

gcc snapshot from 2003/12/30, ca. 7:40am PST
Configured with: ../gcc/configure --prefix=/usr/local_cci/gcc_cvs_2003_12_30 --
enable-languages=c,c++
Redhat Linux 8.0

gcc 3.4.0 fails to compile this piece of code:

        result[ir] = boost::lcm(
          result[ir], norm_denominator(r_(ir, ic), grid[ic]));

However, it works with this trivial modification:

        result[ir] = boost::lcm(
          result[ir], norm_denominator(this->r_(ir, ic), grid[ic]));

The original code works with many other compilers incl. earlier gcc's. Note 
that r_ is a member of the rt_mx class and *not* inherited. I will attach a 
preprocessed file that can be used to reproduce the problem and the workaround:

g++ -fPIC -ftemplate-depth-120 -w -DNDEBUG -O3 -DBOOST_PYTHON_MAX_BASES=2 -
Iinclude -I/net/worm/scratch1/rwgk/rc1310/include -
I/net/worm/scratch1/rwgk/rc1310/cctbx/include -
I/net/worm/scratch1/rwgk/rc1310/scitbx/include -
I/net/worm/scratch1/rwgk/rc1310/boost -I/usr/include/python2.2 -
E /net/worm/scratch1/rwgk/rc1310/cctbx/adptbx/boost_python/adptbx_ext.cpp > 
adptbx_ext_pp.cpp

g++ -fPIC -ftemplate-depth-120 -w -O3 -c adptbx_ext_pp.cpp

In file included 
from /net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/sgtbx/change_of_basis_op
.h:16,
                 
from /net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/sgtbx/tr_group.h:17,
                 
from /net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/sgtbx/space_group.h:17,
                 
from /net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/sgtbx/site_symmetry.h:14
,
                 
from /net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/xray/scatterer.h:4,
                 
from /net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/boost_python/flex_fwd.h:
10,
                 
from /net/worm/scratch1/rwgk/rc1310/cctbx/adptbx/boost_python/adptbx_ext.cpp:1:
/net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/sgtbx/rt_mx.h: In member 
function `GridTupleType cctbx::sgtbx::rt_mx::refine_gridding(const 
GridTupleType&) const':
/net/worm/scratch1/rwgk/rc1310/cctbx/include/cctbx/sgtbx/rt_mx.h:414: error: 
call to non-function `cctbx::sgtbx::rt_mx::r_'

diff adptbx_ext_pp.cpp adptbx_ext_pp_patched.cpp
47390c47390
<           result[ir], norm_denominator(r_(ir, ic), grid[ic]));
---
>           result[ir], norm_denominator(this->r_(ir, ic), grid[ic]));

g++ -fPIC -ftemplate-depth-120 -w -O3 -c adptbx_ext_pp_patched.cpp

Succeeds.

-- 
           Summary: C++ parser regression
           Product: gcc
           Version: 3.4.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rwgk at yahoo dot com
                CC: gcc-bugs at gcc dot gnu dot org
 GCC build triplet: g++ (GCC) 3.4.0 20031230 (experimental)
  GCC host triplet: i686-gnu-linux
GCC target triplet: i686-gnu-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13592