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From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-12-06 07:51:49

Roland Schwarz wrote:

>>Yes, that's what I though. In other words, your implementation is
>>dynamically checked. (This is consistent with the name 'dynamic_new',
> Yes this is by intent. This way it is possible to prepare for ctors that
> are not even available
> at compile time. A user might later decide to (dynamically) hook in a
> respective class.


>>>Please note that my implementation is not very smart and could be
>>>improved by someone
>>>more knowledgeable than me. Perhaps it is not so hard to add support for
>>>type conversion too?
>>The problem is that need either:
>>1. A statically available list of overloaded functions, so that compiler
>>can do the overload resolution.
>>2. Boost.Overload library which can do it using typeid or some other
>>metedata. Such library does not exist, though :-(
> Are you sure? Won't the upcoming typeof() library be of help here?

I think it just emulates in-language typeof, and does not do overload

>>Well, I mean that unlike your solution, you can query for specific
>>constructor signature. Using plugins as example, even if specific plugin
>>class has additional constructors, it's not possible to call them via
>>generic interface.
> I am not sure if I can follow you there.
> 1) I think querying for specific constructor signature is exactly what I
> am doing.

Yes, I mean that your solution can query for a specific signature. Mine
cannot. That can be considered disadvantage of my solution.

> Or do you mean you want to explore an arbitrary class for it's available
> set of ctors
> at runtime before calling into them? I cannot see then what is the value
> of this?
> This surely would be of interest when trying to bind the classes to a
> scripting language.
> But this is not in the scope of my proposal.

I did not consider this too.

> Having glanced over your description I think there is some similarity
> (at least at the creation part).
> I would be very much interested in your boost::plugin lib!
> Unfortunately I was not able to find it in the boost or boost-sandbox so
> far.
> Can I download it somewhere to experiment with it?

I've just added it to sandbox: boost/plugin and libs/plugin. So far, the
example only works for gcc/Linux, but otherwise should be OK. Comments are
very appreciated.

- Volodya

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