The current g++ emits a warning when compiling the following code
with -O3 -Wshadow:
#include <iostream>
int main()
{
std::cout << 3.5;
}
~/tmp>g++ -v -O3 -Wshadow bug.cc
Reading specs
from /afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/specs
Configured with: /scratch/gcc/configure --quiet
--prefix=/afs/mpa/data/martin/ugcc --enable-languages=c++,f95
--with-gmp=/afs/mpa/data/martin/mygmp
Thread model: posix
gcc version 4.0.0 20041117 (experimental)
/afs/mpa/data/martin/ugcc/libexec/gcc/i686-pc-linux-gnu/4.0.0/cc1plus -quiet
-v -D_GNU_SOURCE bug.cc -quiet -dumpbase bug.cc -mtune=pentiumpro -auxbase bug
-O3 -Wshadow -version -o /tmp/ccn0H39v.s
ignoring nonexistent directory
"/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../i686-pc-linux-gnu/include"
#include "..." search starts here:
#include <...> search starts here:
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/i686-pc-linux-gnu
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/backward
/usr/local/include
/afs/mpa/data/martin/ugcc/include
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/include
/usr/include
End of search list.
GNU C++ version 4.0.0 20041117 (experimental) (i686-pc-linux-gnu)
compiled by GNU C version 4.0.0 20041117 (experimental).
GGC heuristics: --param ggc-min-expand=30 --param ggc-min-heapsize=4096
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/bits/locale_facets.tcc:
In member function 'void std::__numpunct_cache<_CharT>::_M_cache(const
std::locale&) [with _CharT = char]':
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/bits/locale_facets.tcc:140:
instantiated from 'const std::__numpunct_cache<_CharT>*
std::__use_cache<std::__numpunct_cache<_CharT> >::operator()(const
std::locale&) const [with _CharT = char]'
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/bits/locale_facets.tcc:1087:
instantiated from '_OutIter std::num_put<_CharT,
_OutIter>::_M_insert_float(_OutIter, std::ios_base&, _CharT, char, _ValueT)
const [with _ValueT = double, _CharT = char, _OutIter =
std::ostreambuf_iterator<char, std::char_traits<char> >]'
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/bits/locale_facets.tcc:1252:
instantiated from '_OutIter std::num_put<_CharT, _OutIter>::do_put(_OutIter,
std::ios_base&, _CharT, double) const [with _CharT = char, _OutIter =
std::ostreambuf_iterator<char, std::char_traits<char> >]'
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/bits/locale_facets.h:2353:
instantiated from '_OutIter std::num_put<_CharT, _OutIter>::put(_OutIter,
std::ios_base&, _CharT, double) const [with _CharT = char, _OutIter =
std::ostreambuf_iterator<char, std::char_traits<char> >]'
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/bits/ostream.tcc:246:
instantiated from 'std::basic_ostream<_CharT, _Traits>&
std::basic_ostream<_CharT, _Traits>::operator<<(double) [with _CharT = char,
_Traits = std::char_traits<char>]'
bug.cc:4: instantiated from here
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../../../include/c++/4.0.0/bits/locale_facets.tcc:208:
warning: declaration of '__ct' shadows a member of 'this'
as -V -Qy -o /tmp/ccRZRUA5.o /tmp/ccn0H39v.s
GNU assembler version 2.14 (i686-pc-linux-gnu) using BFD version 2.14 20030612
/afs/mpa/data/martin/ugcc/libexec/gcc/i686-pc-linux-gnu/4.0.0/collect2
--eh-frame-hdr -m elf_i386
-dynamic-linker /lib/ld-linux.so.2 /usr/lib/crt1.o /usr/lib/crti.o
/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/crtbegin.o
-L/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0
-L/afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/../../..
/tmp/ccRZRUA5.o
-lstdc++ -lm -lgcc_s -lgcc -lc -lgcc_s
-lgcc /afs/mpa/data/martin/ugcc/lib/gcc/i686-pc-linux-gnu/4.0.0/crtend.o
/usr/lib/crtn.o
This is of course not a real bug, but it would still be good if the variable
could be renamed.
--
Summary: Warning about shadowed variable in locale_facets.tcc
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: minor
Priority: P2
Component: libstdc++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: martin at mpa-garching dot mpg dot de
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i686-pc-linux-gnu
GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18530
