Re: [Boost-users] [Boost.Parameter] How to Use Named Parameters in a Class Hierarchy?

From: Wu Yinghui, Freddie (yhwu_at_[hidden])
Date: 2006-10-29 21:30:30

> On 10/26/06, *Wu Yinghui, Freddie* <yhwu_at_[hidden]
> <mailto:yhwu_at_[hidden]>> wrote:
> 
> 
>     My situation is like this:
> 
>     I have a class hierarchy briefly shown as below (assuming virtual member
>     function template is allowed, just to demonstrate the idea):
>     ===== CODE =====
<snip>
>     ===== CODE =====
> 
>     To use the class hierarchy, my program loads the DLL requested by user
>     using LoadLibrary() (We're using Windows, but it should be similar to
>     Linux, I suppose), and makes use of the Derived1/Derived2 classes via a
>     pointer to the Base class.
> 
>     Since I have no information about the derived classes when building my
>     main executable (only Base class is known then), I cannot make direct
>     use of Derived1/Derived2 types in my main program. -- Yet, I need a way
>     to provide some arbitrary set of arguments to the derived classes.
> 
>     Hope my explanation clears your doubts. Do you have any suggestion or
>     alternative design in mind?
> 
> 
> Pass your params packaged in a adobe::dictionary_t (opensource.adobe.com
> <http://opensource.adobe.com>) or something like that - not sure what
> the boost equivalent is.
> 
> Tony

Thanks Tony. Due to our development policy, however, I cannot easily
introduce the libraries from Adobe. :(

But looking at the reference for adobe::dictionary_t, however, makes me
believe that I can replace it with std::map<std::string, boost::any> to
certain extent.

In any case, I've been trying to build something that use
Boost.Parameter naturally (as named parameters to a function). I'll
consider if the alternative approach can satisfy all our requirements first.

Cheers,

Freddie

-- 
Wu Yinghui, Freddie
Research & Development
Senior Software Engineer
Volume Interactions Pte Ltd
1 Kim Seng Promenade, #12-01
Great World City East Tower
Singapore 237994
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Email: yhwu_at_[hidden]
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