Re: [boost] On bind::operator==, again

From: Peter Dimov (pdimov_at_[hidden])
Date: 2004-03-11 10:27:32

Douglas Gregor wrote:
>
> It's not really an alternative. We have two possible reasons that a
> binding operator would want to overload operator==: for comparison or
> for creating a function object. I'm just saying we don't have to
> choose between the alternatives, because we can overload operator==
> to return a function object that also has a conversion to bool that
> compares the stored function objects.

Yep, unfortunately not all of us can, but let's keep implementation
considerations out of it for now.

> The benefit is that we don't need to introduce a "function_equal" to
> compare functions and we can still choose whether to support
> (bind(f, _1) == bind(g, _1))(5)

But there's still the implicit assumption that not introducing
function_equal is a benefit. I don't see why this should be so clear cut.
What particular problems do you see with function_equal?