Re: [jamboost] Re: cool generators insight

From: Vladimir Prus (ghost_at_[hidden])
Date: 2003-06-06 00:51:26

David Abrahams wrote:

> >> A generator with signature A -> B B produces two Bs at the same
> >> time. Am I missing something?
> >
> > True. However, the first CPP returned is always the one which must be
> > processed further.
>
> ???
> Seems totally arbitrary.

No, I don't think so. The rule is arbitrary if it's general rule used by the 
*system*. However, if it's a rule provided by *user*, which applies to 
specific generator, it's not arbitrary at all.

The ECPP target is processed by some tool. Given foo.ecpp, it produces
foo_target.cpp and foo_host.cpp. The first one must be processed further.

Generator is Boost.Build representation of a tool. It takes ECPP target and 
produces two CPP target. Given foo.cpp it will produce foo_target.cpp and 
foo_host.cpp, *in that order*, and the first produced target should be 
processed further.

- Volodya