Re: [boost] interest in properties library

Subject: Re: [boost] interest in properties library
From: Daniel Oberhoff (daniel.oberhoff_at_[hidden])
Date: 2008-12-21 17:26:15

> Daniel Oberhoff wrote:
>
> > HasPropertiesBase<VariantTypes> * foo = new Foo;
> > foo->set_property("a", 1);
> > int a = get<int>( foo->get_property( "a" ) );
>
> And I suppose if it's not an int, it throws?
> For proprieties, it might be better to provide lexical conversion to  
> the
> target type, so that it always succeeds (modulo allocation errors).
>
> Anyway, I'm not too sure this is very useful.
> It's just a std::map<std::string, some_variant_type>. Does that really
> deserve its own class?
>
well, this was the simpler case. by using variants and defining proper  
visitors conversions can be made automatically, like using  
lexical_cast, which is what I wanted to do soon (I alread do the  
simple conversions, just learned about lexical cast now).

But the point of the lib is actually, that you don't need to know the  
type of the class, plus that you have arbitrary setter/getter methods.  
Also properties from classes along the inheritance graph get  
concatenated into a single interface.

Daniel