Declaring Ref Variables Inside Function Calls

[Leandro Lucarella]

Andrei Alexandrescu, el 31 de marzo a las 18:50 me escribiste:
> Leandro Lucarella wrote:
> >Andrei Alexandrescu, el 31 de marzo a las 17:57 me escribiste:
> >>>Agree. They should be first class citizen as dynamic arrays or hashes.
> >>Why? Not grokking it.
> >It's perfectly explained in this thread why, all I have to say will
> >repeate something already said (the int[] vs. std::vector<int> mostly). Of
> >course you don't seem to agree with those arguments...
>
> Well I don't agree, but maybe there's more arguments that could improve that.
>
> >If they are not 1st citizens you just end up:
> >1) not using them
> >2) making your code look like boost, I mean *really* ugly ;)
> >   (when what you want to do it's even possible, of course)
>
> Tuple is a 1st citizen language constituent (they have to). It just doesn't have a literal. Say we do invent a literal, e.g.:
>
> [: int, float :] mytuple;
>
> Does this improve the language over Tuple!(int, float)?

Yes, even when that literal sucks =)

> I'm not convinced - at all, in fact. Right now Tuple is on equal footing
> with other templates and whatever introspection we have/will add
> works/will work on Tuple as it works with other templates. With the
> extra syntax, we'll then need to add special methods for introspecting
> a tuple. We'll find ourselves also reserving a keyword "tuple" and
> positing that [: ... :] is the same as tuple!(...) or some other
> similarly unpleasant solution. Plus, special syntax contributes to the
> disconnect between user-defined and built-in. This creates the
> self-perpetuating trend that if anything is interesting, it should have
> a literal allocated to it. Instead of that, let's think e.g. of methods
> to generally make parameterized types look better.

This is all very nice theory, but in the practice, my 2 previos points
stands.

I'm sorry to keep quoting Python stuff, I agree pretty much with The Zen
if Python (python -m this):

Special cases aren't special enough to break the rules.
Although practicality beats purity.

=)

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Leandro Lucarella (luca) | Blog colectivo: http://www.mazziblog.com.ar/blog/
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