[Boost-users] [iostreams] Assertion in detail/optional.hpp, line 54

From: Daniel Lidström (daniel.lidstrom_at_[hidden])
Date: 2005-11-17 03:04:57

Hello!

when compiled in debug mode, the following program causes an exception
in the file p:\boost_1_33_0\include\boost-1_33\boost\iostreams\detail\
optional.hpp, line 54 (I'm using VC 7.1.3088, Windows XP):

#include <iostream>
#include <boost/iostreams/concepts.hpp>           // sink
#include <boost/iostreams/stream.hpp>             // stream

using namespace std;

class IOutput
{
public:
   virtual void print(int, const char*) const = 0;
};

class Output : public IOutput
{
public:
   void print(int id, const char* a) const { cout << a; }
};

static IOutput* gpOutput;

template<int id>
class my_sink : public boost::iostreams::sink
{
public:

   std::streamsize write(const char* s, std::streamsize n)
   {
      gpOutput->print(id, s);
      std::streamsize sz = 0;
      for( const char* p=s; *p; ++p ) sz++;
      return sz;
   }
};

typedef boost::iostreams::stream<my_sink<5> > output;

int main()
{
   gpOutput = new Output;

   output stream;

   stream << "Daniel" << endl;

   return 0;
}

When I compile in release mode the program prints `Daniel',
just as expected. Is there a problem with my program?

Thanks in advance!

Hälsningar,
Daniel