Re: [Boost-build] How do I write a rule to generate a single cppfrom xml/xsl?

From: Daniel Einspanjer (deinspanjer_at_[hidden])
Date: 2006-02-13 12:28:33

"Vladimir Prus" <ghost_at_[hidden]> wrote in message 
news:200602131305.32815.ghost_at_cs.msu.su...
>
> Not extra nice, and not better than what you've proposed, but that's how I 
> did
> it before. Maybe, we just need 'virtual-target.select-by-type' helper 
> rule,
> so that above can be rewritten as:
>
>    rule generated-targets ( sources + : property-set : project name ? )
>    {
>        return [ generator.generated-targets
>             [ virtual-target.select-by-type XML : $(sources) ]
>             [ virtual-target.select-by-type XSLT : $(sources) ]
>            : $(property-set) : $(project) $(name) ] ;
>    }
>
> Mark, Daniel, what do you think?
>

The helper rule sounds useful in this case.  Do you think there would be 
enough other problems solved by similar logic to make it worthwhile?

I am also wondering about extended scenarios similar to my presented 
situation.  For instance, what would a user do if they wanted to be able to 
specify an arbitrary number of xml and/or xsl files?  I would envision that 
being something the user might wish to do if they wanted to give a list of 
xml files that should all be run through all given xsl files making a 
Cartesian product.