Re: [Dev-C++] object evaluation

[<or...@vp...>]

Tim Schumacher wrote:
> !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:

I think I found it :)

----

       /**
        *  @brief  The quick-and-easy status check.
        *
        *  This allows you to write constructs such as
        *  "if (!a_stream) ..." and "while (a_stream) ..."
       */
       operator void*() const
       { return this->fail() ? 0 : const_cast<basic_ios*>(this); }

       bool
       operator!() const
       { return this->fail(); }

----

Seems I was right about the conversion, but they simplified the whole=20
thing with converting it to void*, as it will also be used in a bool=20
context (one less operator overload to write).

I still wonder, what if I write a bool conversion operator only. Then I=20
wouldn't even need operator!, because bool conversion is made first, and=20
"not" (operator!) is used afterwards for the converted bool value.

It's late now. I'll write some test-progs tomorrow.

--
Greetings,
   Bal=E1zs