Re: new round

Alexander Nasonov wrote:

> On Thursday 26 February 2004 13:29, David Abrahams wrote:
> 
>>Alexander Nasonov writes:
>>
>>>The x_module object is a root of information about entities defined
>>>there. They can be introduced like this:
>>>
>>>x_module
>>>[
>>>    def("free_function", free_function),
>>>    class_<X>("X")
>>>    [
>>>        def("member_function", &X::member_function)
>>>    ],
>>>];
>>
>>Sure!
> 
> 
> I decided to minimize compile-time checks to reduce compilation time. For
> example, there is no compile-time check for member_function to belong to X.
> I'll implement it as a runtime function later.

This likely won't work. We need to know the type of the wrapped class
when generating the member function dispatcher.

>>>Retrieving a definition from x_module is simple:
>>>
>>>definition free_function_def =
> 
> x_module.find_definition("free_function");
> 
>>OK...
>>
>>
>>>Although I implemented only class 'definition' I'm going to add
>>>function_def, class_def and so on.
>>
>>You lost me.
> 
> 
> Well, generic 'definition' can call overloaded function properly or it can
> be used to retrieve nested definitions. This comes at runtime cost, though.
> Other possibility might be to find a best function at startup and then call
> the function quickly. To archieve this, specialized classes are required.

I'm kind of lost here. But I think that this is beyond the scope of
langbinding. This looks like boost::python::object or luabind::object.

>>>This code works fine in my test version if free_function is not
>>>overloaded.
>>
>>...for overloading?
> 
> C++ rules are complicated and I don't want to start implementation until
> concepts are clarified. Only simple skeleton at the beginnning.

Have you scanned our discussions on this list? A lot of thought has
already gone into this, and I would hate for you to reinvent the wheel.

Also, a fairly large part of this has been implemented in BPL and
luabind (conversion and policy systems for instance). And I have started
working on implementing the "abstract interface" thing. I expected to
check something in in a few days, when I get a bit of free time from the
luabind release.

Perhaps you could compare what I'll be checking in and what we have
already discussed on the list with your ideas?

-- 
Daniel Wallin


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