Re: errors under g++ 3.2.2

[David Leimbach]

On Sunday, June 29, 2003, at 1:19PM, Allan Bowhill wrote:

I recently updated one of my machines to -current to adapt some code to
build under the new version of gcc (3.2.2). However, file IO using 
<fstream>
gives error messages about implicit typenames being deprecated, and I 
can't
for the life of me figure out what to do my code to make the compiler 
happy.
Has anyone encountered this?

Below is a small example illustrating the problem. The source below 
should
compile fine on a previous version of g++, as in -stable.  However, it 
will
not compile on -current using g++ 3.3.2. Does anyone know what to do 
to the
simple source below to get it to compile happily under -current?

(yes, I have checked gnu gcc's mailing list and FAQ/docs. I can't find 
an
adequate explanation for it. I suspect it has something to do with 
stricter
conformance to the finalized C++ standard, but since I am still a 
novice any
explanation by gcc developers would probably have slipped by me)

Your code below is fine... there is something wrong with the C++ 
headers used
in the FreeBSD tree.  I haven't seen this on other platforms.  I don't 
think that those with commit access generally do a lot with C++ 
[possibly a bad assumption, but I have
a hard time believing the problem would have lived so long if this 
weren't the case]

Dave



---------

#include <fstream>

int main()
{
    std::ofstream afile("test.txt");
    afile << "some data";
}
----------

gcc -v
Using built-in specs.
Configured with: FreeBSD/i386 system compiler
Thread model: posix
gcc version 3.2.2 [FreeBSD] 20030205 (release)
---------

g++ test.cc
In file included from test.cc:1:
/usr/include/g++/fstream:304: warning: `typename 
std::basic_filebuf<_CharT,
   _Traits>::int_type' is implicitly a typename
/usr/include/g++/fstream:304: warning: implicit typename is deprecated,
please
   see the documentation for details
/usr/include/g++/fstream:309: warning: `typename 
std::basic_filebuf<_CharT,
   _Traits>::int_type' is implicitly a typename
/usr/include/g++/fstream:309: warning: implicit typename is deprecated,
please
   see the documentation for details

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