Hello,

I want to compute, for example
d = a + b + c
where a..d are of some derived type, without incurring the cost of temporaries for each overloaded operation.

In a similar post a while ago, Walter Bright proposed using function literals instead of template expressions to do this. After looking at function literals, I can't work out what he had in mind with this suggestion. May someone present a succinct
complete example to demonstrate how solve this?

Many thanks,
Dominic Jones

Le 28/10/2011 19:18, Dominic Jones a écrit :
> Hello,
>
> I want to compute, for example
> d = a + b + c
> where a..d are of some derived type, without incurring the cost of temporaries for each overloaded operation.
>
> In a similar post a while ago, Walter Bright proposed using function literals instead of template expressions to do this. After looking at function literals, I can't work out what he had in mind with this suggestion. May someone present a succinct
> complete example to demonstrate how solve this?
>
> Many thanks,
> Dominic Jones

I was thinking about porting http://eigen.tuxfamily.org/index.php in D. I'm currently on SFML2 but it goes quite fast (thanks to  Trass3r for porting SFML to D2 so a big part of the job is done).

You may want to do so ? Anyway, I'm not surefunction literal can do the trick. I would be interested on knowing more on the topic. If it is more suitable, maybe I should reconside my project to port eigen.

Deadalnix

> I was thinking about porting http://eigen.tuxfamily.org/index.php in D.

Don't we have a LinAlg library now thx to that GSoC project?

> I'm currently on SFML2 but it goes quite fast (thanks to  Trass3r for porting SFML to D2 so a big part of the job is done).

You're welcome.