gcc-3.1: problems with filebuf constructor for FILE*

[Scott Johnston]

Benjamin Kosnik wrote:

>>I find that __c_file_type (as used in <bits/basic_file.h>) is
>>undefined when I
>>compile code that includes <ext/stdio_filebuf.h>.  Introducing my own
>>"#define __c_file_type std::__c_file" seems to fix that.
>>
>>Then I run into the problem that <bits/basic_file.h> is looking for 
>>_M_cfile
>>member variable that is no longer there, as shown below (at the bottom
>>of this e-mail).  Adding my own
>>"#define _GLIBCPP_BASIC_FILE_ENCAPSULATION 1" seems to
>>alleviate that confusion.
>>
>>Now I'm struggling with a conflict between const is_open methods at
>>one level
>>that invoke non-const is_open methods, so I see the warning:
>>    
>>
>
>You'll need to provide a minimal testcase, please. 
>
>This, for instance, works:
>
>#include <ext/stdio_filebuf.h>
>
>int main()
>{
>  using namespace std;
>  using __gnu_cxx::stdio_filebuf;
>
>  stdio_filebuf<char> one(0, ios_base::in, true, BUFSIZ);
>
>  __c_file* f = fopen("tmp", "rw");
>  stdio_filebuf<char> two(f, ios_base::in, BUFSIZ);
>
>  return 0;
>}
>
>  
>
No, that doesn't compile for me.  I saved the above program into test.cc and
compiled with plain vanilla gcc-3.1 on RedHat 6.2, and I got the following
error messages.

Scott Johnston

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

gcc test.cc
In file included from /usr/local/include/g++-v3/fstream:48,
                 from /usr/local/include/g++-v3/ext/stdio_filebuf.h:30,
                 from test.cc:1:
/usr/local/include/g++-v3/bits/basic_file.h:52: parse error before `{' token
/usr/local/include/g++-v3/bits/basic_file.h:57: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:57: function `int 
std::overflow(int
   = -1)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:60: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:60: function `int 
std::underflow()'
   is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:63: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:63: function `int 
std::uflow()' is
   initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:66: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:66: function `int
   std::pbackfail(int)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:69: parse error before `*' token
/usr/local/include/g++-v3/bits/basic_file.h:69: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:69: function `streamsize
   std::xsputn(...)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:72: `_CharT' was not 
declared in
   this scope
/usr/local/include/g++-v3/bits/basic_file.h:72: `__s' was not declared 
in this
   scope
/usr/local/include/g++-v3/bits/basic_file.h:72: parse error before `)' token
/usr/local/include/g++-v3/bits/basic_file.h:72: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:72: function `streamsize
   std::xsgetn(...)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:76: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:76: function `streamoff
   std::seekoff(long int, std::_Ios_Seekdir, std::_Ios_Openmode =
   std::operator|(std::_Ios_Openmode,
   std::_Ios_Openmode)((std::_Ios_Openmode)8, (std::_Ios_Openmode)16))' is
   initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:80: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:80: function `streamoff
   std::seekpos(long int, std::_Ios_Openmode =
   std::operator|(std::_Ios_Openmode,
   std::_Ios_Openmode)((std::_Ios_Openmode)8, (std::_Ios_Openmode)16))' is
   initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:83: `_CharT' was not 
declared in
   this scope
/usr/local/include/g++-v3/bits/basic_file.h:83: `__b' was not declared 
in this
   scope
/usr/local/include/g++-v3/bits/basic_file.h:83: parse error before `)' token
/usr/local/include/g++-v3/bits/basic_file.h:83: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:83: function `std::streambuf*
   std::setbuf(...)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:86: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:86: function `int 
std::sync()' is
   initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:89: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:89: function `int 
std::doallocate()
   ' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:92: `_CharT' was not 
declared in
   this scope
/usr/local/include/g++-v3/bits/basic_file.h:92: `__s' was not declared 
in this
   scope
/usr/local/include/g++-v3/bits/basic_file.h:92: parse error before `)' token
/usr/local/include/g++-v3/bits/basic_file.h:92: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:92: function `streamsize
   std::sys_read(...)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:95: parse error before `*' token
/usr/local/include/g++-v3/bits/basic_file.h:95: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:95: function `streamsize
   std::sys_write(...)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:98: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:98: function `streamoff
   std::sys_seek(long int, std::_Ios_Seekdir)' is initialized like a 
variable
/usr/local/include/g++-v3/bits/basic_file.h:101: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:101: function `int 
std::sys_close()
   ' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:104: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:104: function `int
   std::sys_stat(void*)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:107: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:107: function `int 
std::showmanyc()
   ' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:110: virtual outside class
   declaration
/usr/local/include/g++-v3/bits/basic_file.h:110: function `void
   std::imbue(void*)' is initialized like a variable
/usr/local/include/g++-v3/bits/basic_file.h:133: parse error before `*' 
token
/usr/local/include/g++-v3/bits/basic_file.h:136: parse error before `::' 
token
/usr/local/include/g++-v3/bits/basic_file.h:141: type specifier omitted for
   parameter `ios_base'
/usr/local/include/g++-v3/bits/basic_file.h:141: parse error before `::' 
token
/usr/local/include/g++-v3/bits/basic_file.h:148: parse error before `::' 
token
/usr/local/include/g++-v3/bits/basic_file.h:185: `streamsize' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:185: parse error before `(' 
token
/usr/local/include/g++-v3/bits/basic_file.h:191: `streamsize' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:191: declaration of `int
   __basic_file<_CharT>::streamsize'
/usr/local/include/g++-v3/bits/basic_file.h:185: conflicts with previous
   declaration `int __basic_file<_CharT>::streamsize'
/usr/local/include/g++-v3/bits/basic_file.h:191: parse error before `(' 
token
/usr/local/include/g++-v3/bits/basic_file.h:197: `streamoff' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:197: parse error before `(' 
token
/usr/local/include/g++-v3/bits/basic_file.h:204: `streamoff' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:204: declaration of `int
   __basic_file<_CharT>::streamoff'
/usr/local/include/g++-v3/bits/basic_file.h:197: conflicts with previous
   declaration `int __basic_file<_CharT>::streamoff'
/usr/local/include/g++-v3/bits/basic_file.h:204: parse error before `(' 
token
/usr/local/include/g++-v3/bits/basic_file.h:207: `streambuf' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:207: parse error before `*' 
token
/usr/local/include/g++-v3/bits/basic_file.h:220: `streamsize' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:220: declaration of `int
   __basic_file<_CharT>::streamsize'
/usr/local/include/g++-v3/bits/basic_file.h:185: conflicts with previous
   declaration `int __basic_file<_CharT>::streamsize'
/usr/local/include/g++-v3/bits/basic_file.h:220: parse error before `(' 
token
/usr/local/include/g++-v3/bits/basic_file.h:226: `streamsize' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:226: declaration of `int
   __basic_file<_CharT>::streamsize'
/usr/local/include/g++-v3/bits/basic_file.h:185: conflicts with previous
   declaration `int __basic_file<_CharT>::streamsize'
/usr/local/include/g++-v3/bits/basic_file.h:226: parse error before `(' 
token
/usr/local/include/g++-v3/bits/basic_file.h:232: `streamoff' declared as a
   `virtual' field
/usr/local/include/g++-v3/bits/basic_file.h:232: declaration of `int
   __basic_file<_CharT>::streamoff'
/usr/local/include/g++-v3/bits/basic_file.h:197: conflicts with previous
   declaration `int __basic_file<_CharT>::streamoff'
/usr/local/include/g++-v3/bits/basic_file.h:232: parse error before `(' 
token
/usr/local/include/g++-v3/bits/basic_file.h:246: parse error before `}' 
token
In file included from /usr/local/include/g++-v3/bits/basic_file.h:250,
                 from /usr/local/include/g++-v3/fstream:48,
                 from /usr/local/include/g++-v3/ext/stdio_filebuf.h:30,
                 from test.cc:1:
/usr/local/include/g++-v3/i686-pc-linux-gnu/bits/basic_file_model.h:38: 
parse
   error before `*' token
/usr/local/include/g++-v3/i686-pc-linux-gnu/bits/basic_file_model.h:38: 
confused by earlier errors, bailing out