Re: STL iterator problem (egcs-1.1.2)

Re: STL iterator problem (egcs-1.1.2)

[Alexandre Oliva]

On Jul  2, 1999, Chris Rankin <rankinc@zip.com.au> wrote:

> I hope that this is a minor problem, what with the gcc release just
> around the corner.
> The included program does not compile:

After adding a closing bracket for main, it only complains about:

teststl.cpp: In function `int main()':
teststl.cpp:23: no match for `reverse_iterator<const int *> & !=
reverse_iterator<int *>'

Which is indeed correct.  It may be regarded as an STL problem, and so
it might be fixed in the next import of SGI STL, or the problem should
be reported to the maintainers of SGI STL, which we simply
re-distribute.  In order to avoid this problem, instead of writing:

>   NumberCollection::const_reverse_iterator  riter;

>   for (riter = num_collect.rbegin();
>        riter != num_collect.rend();
>        ++riter)
>   {

I write:

for (NumberCollection::const_reverse_iterator riter=..., eiter=...end();
     riter != eiter; ++riter) ...

which compiles fine.

-- 
Alexandre Oliva http://www.dcc.unicamp.br/~oliva IC-Unicamp, Bra[sz]il
{oliva,Alexandre.Oliva}@dcc.unicamp.br  aoliva@{acm.org,computer.org}
oliva@{gnu.org,kaffe.org,{egcs,sourceware}.cygnus.com,samba.org}
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STL iterator problem (egcs-1.1.2)

[Chris Rankin]

Hi,
I hope that this is a minor problem, what with the gcc release just
around the corner.
The included program does not compile:

g++ -O2 -march=pentium -fstrict-prototypes -felide-constructors
-fnonnull-object
s -fno-strict-aliasing  -I../Debug/ -Wall -Wshadow -Wsign-compare
-Wwrite-string
s -Wstrict-prototypes -Wmissing-prototypes -Wpointer-arith
-Wmissing-declaration
s -o teststl teststl.cpp
/usr/include/g++/std/bastring.h: In method
`basic_string<charT,traits,Allocator>
::basic_string(InputIterator, InputIterator)':
In file included from /usr/include/g++/string:6,
                 from teststl.cpp:3:
/usr/include/g++/std/bastring.h:153: warning: declaration of `end'
shadows a mem
ber of `this'
/usr/include/g++/std/bastring.h:153: warning: declaration of `begin'
shadows a m
ember of `this'
/usr/include/g++/std/bastring.cc: In method `void
basic_string<charT,traits,Allo
cator>::alloc(size_t, bool)':
In file included from /usr/include/g++/std/bastring.h:618,
                 from /usr/include/g++/string:6,
                 from teststl.cpp:3:
/usr/include/g++/std/bastring.cc:98: warning: declaration of `size'
shadows a me
mber of `this'
/usr/include/g++/stl_iterator.h: In method `reverse_iterator<const int
*>::rever
se_iterator<int *>(const class reverse_iterator<int *> &)':
teststl.cpp:22:   instantiated from here
/usr/include/g++/stl_iterator.h:548: member `current' is a protected
member of c
lass `reverse_iterator<int *>'
teststl.cpp: In function `int main()':
teststl.cpp:23: no match for `reverse_iterator<const int *> & !=
reverse_iterato
r<int *>'
make: *** [teststl] Error 1

-----------------------------------------------------------------------------

#include <iostream>
#include <vector>
using namespace std;

typedef  vector<int>  NumberCollection;

int
main()
{
  NumberCollection  num_collect;

  for (int i = 0; i < 100; ++i)
  {
    num_collect.push_back(i);
  } /* for */

  NumberCollection::const_reverse_iterator  riter;

  for (riter = num_collect.rbegin();
       riter != num_collect.rend();
       ++riter)
  {
    cout << *riter << endl;
  } /* for */
                                                                  
$ g++ -v
Reading specs from /usr/lib/gcc-lib/i586-pc-linux-gnu/egcs-2.91.66/specs
gcc version egcs-2.91.66 19990314 (egcs-1.1.2 release)

(I also see this compiling with egcs-1.1.2 on Solaris 2.6)

Cheers,
Chris.