Error in testing class tuple

23 Dec 2002

      Happy Holidays to everyone!  I am getting aquainted with the tuple 
class but am encountering the following error:

c:\BGL\boost_1_29_0\boost\tuple\tuple_comparison.hpp(119): error 
C2027: use of undefined type 'boost::STATIC_ASSERTION_FAILURE<x>'
        with
        [
            x=false
        ]

with the following program:

/**
 * tupleTest.cpp
 * Test of Boost library class tuple
 * A tuple is a fixed size collection of elements
 * Stored objects may be of different types
 * Current support of tuples with 0-10 objects
 * Objects may be any valid C++ type except void and function types
 * Jon Agiato
 * 12-23-02
 */

#include <iostream>
using std::cout;
using std::cin;
using std::ostream;
using std::cerr;

#include <cstdlib>

#include <boost/tuple/tuple.hpp>
using boost::tuple;

// both tuple_io.hpp and tuple_comparison.hpp include tuple.hpp

// tuple_io must be included for tuple input and output operators
#include <boost/tuple/tuple_io.hpp>

// tuple_comparison.hpp must be included for comparison operators
#include <boost/tuple/tuple_comparison.hpp>

#include <string>
using std::string;

#include <exception>
using std::exception;

class A
{
   friend ostream &operator<<(ostream &output, const A &a)
   {
      output << a.S;

      return output;
   }
public:
   A(string s = "Testing"):S(s) {;}
   string S;
};

class B
{
   friend ostream &operator<<(ostream &output, const B &b)
   {
      output << b.D;

      return output;
   }
public:
   B(double d = 3.501):D(d) {;}
   double D;
};

class C
{
   friend ostream &operator<<(ostream &output, const C &c)
   {
      output << c.state;

      return output;
   }
public:
   C(bool st = true):state(st) {;}
   double state;
};

int main()
{
   try
   {
      tuple<A, B, C> testTuple;
      cout << testTuple << '\n';

      tuple<B, A> test2Tuple;
      if(testTuple == test2Tuple)
         cout << testTuple << " is equal to " << test2Tuple << '\n';
      else
         cout << testTuple << " is not equal to " << test2Tuple 
<< '\n';

      cout << "Press enter to exit...";
      cin.get();

      return EXIT_SUCCESS;
   }
   catch(const exception &E)
   {
      cerr << "Standard library exception: " << E.what() << '\n';

      return EXIT_FAILURE;
   }
   catch(...)
   {
      cerr << "Unknown exception thrown.\n";

      return EXIT_FAILURE;
   }
}

I am using Visual Studio.NET Enterprise Architect

Thanks!

Jon Agiato
JonAgiato@nyc.rr.com

Error in testing class tuple

agiatojon <JonAgiato＠nyc.rr.com>