STD_EXCEPTION.cpp

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// checking for class std::exception
 
 
#include "config.h"
 
#ifndef _RWSTD_NO_HONOR_STD
#  ifdef _RWSTD_NO_STD_TERMINATE
#    include "terminate.h"
#  endif   // _RWSTD_NO_STD_TERMINATE
#endif   // _RWSTD_NO_HONOR_STD
 
 
// will fail if namespaces aren't supported
namespace std {
 
class exception { };
 
}
 
// force a failure if namespace std isn't honored
class exception { };
 
 
struct B { virtual ~B () { } };
struct D1: B { };
struct D2: B { };
 
int main ()
{
    D1 d1;
    B &b = d1;
 
    try {
        // throws [std::] bad_cast
        D2 &d2 = dynamic_cast<D2&>(b);
    }
    catch (exception&) {
        // fail if namespace std isn't honored
        return 1;
    }
    catch (std::exception&) {
        return 0;
    }
    catch (...) {
        // fail if cast throws anything other than an std::exception-derivative
        return 1;
    }
 
    // fail if cast doesn't throw
    return 2;
}