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From: lambache AT biochem DOT mpg DOT de
Date: Tue, 16 Jun 1998 13:33:18 -0400
Message-Id: <199806161733.NAA112.76@pcfr39.biochem.mpg.de>
To: beastium-list AT Desk DOT nl
Subject: problems with ifstream [bug?]
Sender: Marc Lehmann <pcg AT goof DOT com>
Status: RO
X-Status: A
Content-Length: 2206
Lines: 88

Hello,

I'm new to the list, so please forgive me, if this has been
discussed before, at least I didn't find it in the FAQ.

The problem:

I try to use an ifstream as an argument for a function, but
pgcc won't compile the code.

Here is an example:

----program test.cxx----CUT HERE------
//test.cxx

#include <iostream.h>
#include <fstream.h>

void test( ifstream infile )
{
  char line[256];
  
  infile >> line;
 
  cout << line;
}

int main()
{
  ifstream indatei("test.cxx");

  test(indatei);

  return 0; 
}
----end of program-----CUT HERE---

I tried to compile this with:

gcc -c test.cxx

I get the following error messages:

/emx/include.new/cpp/streambuf.h: In method `ifstream::ifstream(const class ifst
ream &)':
/emx/include.new/cpp/streambuf.h:119: `ios::ios(const class ios &)' is private
test.cxx:19: within this context
/emx/include.new/cpp/streambuf.h: In method `fstreambase::fstreambase(const clas
s fstreambase &)':
/emx/include.new/cpp/streambuf.h:119: `ios::ios(const class ios &)' is private
test.cxx:19: within this context
/emx/include.new/cpp/streambuf.h: In method `istream::istream(const class istrea
m &)':
/emx/include.new/cpp/streambuf.h:119: `ios::ios(const class ios &)' is private
test.cxx:19: within this context

If I compile it with gcc 2.7.2.1 (emx0.9c) it compiles and runs fine!

My setup is:

OS/2 Warp 4, no fixpack

pgcc-version:

gcc -v
Using builtin specs.
gcc version pgcc-2.90.27 980315 (egcs-1.0.2 release)

So, is this a bug or is this correct behaviour and I'm trying something
that's not allowed?

I'm really interested in solving the problem, because I'm doing some
numerical calculations and pgcc produces code, that is nearly twice
as fast as standard gcc in my problem ! (I've lost my benchmarks of a 
working program, but it was a factor around 1.9)

Regards

Armin

-- 
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Armin Lambacher                                 email: lambache AT biochem DOT mpg DOT de

"Ich sag' nicht viel, aber was ich sag' ist Quatsch." (Pippi Langstrumpf)

"He, der Kerl hat 'ne Meise, aber Rueckenwind!" (thomas d)
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