Re: syntax suggestion

Daniel Wallin <[email protected]> writes:

> David Abrahams wrote:
>
>> Alexander Nasonov <[email protected]> writes:
>> 
>>>Daniel Wallin wrote:
>>>>When in doubt I tend to go for the less verbose and less complicated
>>>>alternative, so I guess I like the original version is better:
>>>>
>>>>     class_<C, bases<A, B> >("C")
>>>>       .def(..)
>>>>       .def(..)
>>>>       ;
>>>>
>>>>Here are some other possibilities:
>>>>
>>>>     // Cool, but not very portable
>>>>     class_<C(A, B)>("C")
>> I like the syntax; I guess we need to decide whether we care about
>> older compilers or not.
>
> Yeah, it mirrors both the python and luabind syntax. But I really
> dislike dropping older compilers. 

I'm beginning to like the idea of dropping them.

> Maybe supporting both ala Boost.Function?

There's always:

    class_<C (*)(A,B)>("C")

for the others, if we can afford not to  have C deduced at the outer
level w/o partial specialization.

>>>>       .def(..)
>>>>       .def(..)
>>>>       ;
>>>>
>>>>     // Just add more parameters to class_<>, complicates
>>>>     // the metaprogramming
>> Definitely problematic, especially if you want to be able to pass
>> other parameters.
>
> Why? It's not like it's hard to discriminate the params. We do that in
> both luabind and BPL already.

True; for bases a little visual grouping is probably beneficial.  Not
a huge deal, though.  On second thought, MI is rare enough that maybe
it's not so important.


>>>>
>>>>I think we need more opinions, anyone?
>> The only advantage I can see to using the []s is that it becomes a
>> bit cleaner to define nested classes.
>
> FWIW, this is what it this currently looks like in luabind:
>
>     module(L)
>     [
>         class_<X>("X")
>             .static_
>             [
>                 class_<Y>("Y")
>                    ...
>             ]
>     ];

Nit: what is .static_ supposed to mean?  Maybe .scope[ ... ] would be
better?

-- 
Dave Abrahams
Boost Consulting
www.boost-consulting.com



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