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Hi,

What does overloading operator () exactly do ?.

John

Johan wrote:

> Hi,
>
> What does overloading operator () exactly do ?.

You get an object that you can use like a function.

"Johan" writes:

> What does overloading operator () exactly do ?.

The buzz word you need to know to learn more is functor. Aka function
object. A few minutes of googling didn't turn up anything I really liked.
(Wikipedia seems to be down - not a good start). If you have access to a
decent technical library the best write up I know of is in _Mastering
Object-Oriented Design ion C++_ by Horstmann, p. 220.

Note that this is the only way you can have a comma in the argument list.

I found these two links, don't really like either one of them, but they were
the only two of the first thirty or so hits that even seemed worth saving.

http://www.free-web-template.org/fu/functor.html

http://www.sgi.com/tech/stl/functors.html

Andrei Alexandrescu's Generic Programming is the best book i have read
about the techniques used with templates to generalize your approach.
It has a detailed chapter on functors.

Also if you ae actually looking for functors you may find good
tutorials in boost library.
Regards,
Ramneek
osmium wrote:
> "Johan" writes:
>
> > What does overloading operator () exactly do ?.
>
> The buzz word you need to know to learn more is functor. Aka
function
> object. A few minutes of googling didn't turn up anything I really
liked.
> (Wikipedia seems to be down - not a good start). If you have access
to a
> decent technical library the best write up I know of is in _Mastering

> Object-Oriented Design ion C++_ by Horstmann, p. 220.
>
> Note that this is the only way you can have a comma in the argument
list.
>
> I found these two links, don't really like either one of them, but
they were
> the only two of the first thirty or so hits that even seemed worth
saving.
>
> http://www.free-web-template.org/fu/functor.html
>
> http://www.sgi.com/tech/stl/functors.html