Re: [jamboost] Multiple ways to build a target?

From: Vladimir Prus (ghost_at_[hidden])
Date: 2003-03-17 01:52:05

Douglas Gregor wrote:

> That's fine when generating, say, boost.html from src/boost.xml. But if I
> add:
>
> generators.register-standard boostbook.xslt : XML XSLT : * ;
>
> and request the same, I get the errors listed at the end of this message.
> It looks like it isn't even finding the XML->DOCBOOK->HTML path.
>
> This isn't urgent (I don't really _need_ the XML XSLT --> * generator now).

I'm not sure this is designed as it should, but it works as designed ;-)
When choosing "viable" generators, we start with generic generators (with "*" 
as target type, then requested type, and then each base type). When a 
generator is found for a type, we don't consider other types. In this 
example, a generator for "*" is found, and is considered the only viable one.
It is run, but produces nothing. Oops -- failure.

The "*" as a target type was invented for very special purposes. For example,
if there's <file> property, we need to run 'prebuilt-file-generator', no 
matter what source and targets types are. That generators has "*" as target 
type and <file> as required feature. Using "*" for ordinary generators was 
never considered, so it does not work.

- Volodya