Re: [Boost-build] Registering a second unrelated type with the same extension.

From: Jurko Gospodnetić (jurko.gospodnetic_at_[hidden])
Date: 2007-10-25 03:50:33

   Hi Volodya.

> Just to clarify -- there's are two mapping here. One is suffix -> type,
> used when we need to decide what's the type of the source file, and
> another is type->suffix, used to decide what's the suffix to use
> on generated targets. The first mapping, naturally, does not allow
> duplicate suffixes, but the second one does.
> 
> It's possible to first declare a type with no suffixes, and then
> use type.set-generated-target-suffix to specify generated suffix
> explicitly.
> 
> Will it help in your case?

   Yup, we tested this and it does help in our case. We still need to 
use the technique in the actual projects but I will get to that some 
time later today and I do not expect it to cause any problems.

   Extender documentation does mention this rule but I would suggest 
updating the docs to include both the explanation given in your previous 
post (about theer being two mappings and the type.register parameter 
being used to populate both of them) and possibly a paragraph such as:

   'Types not used to model source but only generated files should 
specify their file extension using the type.set-generated-target-suffix 
Boost.Build rule. This allows them to exist even if some other used 
Boost.Build module already defines a type with the same suffix name.'

   Thank you for the prompt reply!

   Best regards,
     Jurko Gospodnetić