From:	"23yrold3yrold" <cbarry AT pangea DOT ca>
Newsgroups:	comp.os.msdos.djgpp
Subject:	DJGPP and the C++ standard
Date:	Thu, 22 Mar 2001 17:15:39 -0600
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To:	djgpp AT delorie DOT com
DJ-Gateway:	from newsgroup comp.os.msdos.djgpp
Reply-To:	djgpp AT delorie DOT com

Short and simple; here's the code. At compile time, I get the error at the
bottom. I posted this at comp.lang.c++ for help, and everyone compiled it
just fine. So I'm gonna guess it's a DJGPP thing. Perhaps I have an outdated
version of the compiler's STL or something (my copy of DJGPP was downloaded
from the official homepage less than a year ago though). This is an example
program from "The C++ Standard Library" by Nicolai Josuttis (p. 603), if you
care.

// io/sum1a.cpp

#include <istream>

namespace MyLib
{
   double ReadAndProcessSum(std::istream& strm)
   {
      using std::ios;
      double value, sum;

      // save current state of exception flags
      ios::iostate oldExceptions = strm.exceptions();

      // let failbit and badbit throw exceptions
      // - NOTE: failbit is also set at end-of-file
      strm.exceptions(ios::failbit | ios::badbit);

      try
      {
         // while stream is OK read value and add it to sum
         sum = 0;
         while (strm >> value)
         {
            sum += value;
         }
      }

      catch( ... )
      {
         // if exception not caused by end-of-file
         // - restore old state of exception flags
         // - rethrow exception
         if (!strm.eof())
         {
            strm.exceptions(oldExceptions);  // restore exception flags
            throw;                           // rethrow
         }
      }

      // restore old state of exception flags
      strm.exceptions(oldExceptions);

      // return sum
      return sum;
   }
}

That file compiles fine .......

// io/summain.cpp

#include <iostream>
#include <cstdlib>

namespace MyLib
{
   double ReadAndProcessSum(std::istream&);
}

int main()
{
   using namespace std;
   double sum;

   try
   {
      sum = MyLib::ReadAndProcessSum(cin);
   }
   catch (const ios::failure& error)                           //   <=====
error right here
   {
      cerr << "I/O exception: " << error.what() << endl;
      return EXIT_FAILURE;
   }
   catch (const exception& error)
   {
      cerr << "standard exception: " << error.what() << endl;
      return EXIT_FAILURE;
   }
   catch ( ... )
   {
      cerr << "unknown exception" << endl;
      return EXIT_FAILURE;
   }

   // print sum
   cout << "sum: " << sum << endl;
}

 .... that one doesn't. Any help? Thanks.

Compiling: Summain.cpp
In function `int main()':
Summain.cpp (20) Error: parse error before `&'
Summain.cpp (24) Error: confused by earlier errors; bailing out
There were some errors


Chris

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