Test-nullObject.C

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#include "nullObject.H"
#include "IOstreams.H"
 
using namespace Foam;
 
class SimpleClass
{
 
public:
 
    //- Null constructor
    SimpleClass()
    {}
};
 
 
int main()
{
    // Test pointer and reference to a class
 
    SimpleClass* ptrToClass = new SimpleClass;
    SimpleClass& refToClass(*ptrToClass);
 
    if (notNull(ptrToClass))
    {
        Info<< "Pass: ptrToClass is not null" << endl;
    }
    else
    {
        Info<< "FAIL: refToClass is null" << endl;
    }
 
    if (notNull(refToClass))
    {
        Info<< "Pass: refToClass is not null" << endl;
    }
    else
    {
        Info<< "FAIL: refToClass is null" << endl;
    }
 
 
    // Test pointer and reference to the nullObject
 
    const SimpleClass* ptrToNull(NullObjectPtr<SimpleClass>());
    const SimpleClass& refToNull(*ptrToNull);
 
    if (isNull(ptrToNull))
    {
        Info<< "Pass: ptrToNull is null" << endl;
    }
    else
    {
        Info<< "FAIL: ptrToNull is not null" << endl;
    }
 
    if (isNull(refToNull))
    {
        Info<< "Pass: refToNull is null" << endl;
    }
    else
    {
        Info<< "FAIL: refToNull is not null" << endl;
    }
 
    // Clean-up
    delete ptrToClass;
 
    return 0;
}