Re: [Dev-C++] object evaluation

[Tim S. <ti...@we...>]

Hi Oroszi,

you wrote:

> I'm just courious about how can I "evaluate" an object, like fstream=20
> does it:
>=20
> ifstream infile( "C:/file.txt" );
> if ( !infile ) { /*...*/ }
>=20
> Is it done with the type conversion operator (converting to bool)?

!object you can do with overloading operators, for just checking object
I didnt figured out yet. This is a small Program which I tried and
seemed to work:

<<<<<<<<<<<<<< Schnip <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<
#include <iostream>
                                                                           =
                                                 =20
using namespace std;
                                                                           =
                                                 =20
class test
{
        private:
                bool bimbes;
        public:
                bool operator!()
                {
                        return bimbes;
                }
                test(bool a)
                {
                        bimbes =3D a;
                }
                                                                           =
                                                 =20
};
                                                                           =
                                                 =20
int main()
{
        test blub =3D test(true);
        if (!blub)
        {
                cout << "Cool!" << endl;
        }
        return 0;
}

>>>>>>>>>>>> Schnapp >>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

but if you want to know how it works exactly, just look at the source of
fstream.

so long

Tim

--=20
http://we-are-teh-b.org/~tim/borg.key
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