[ECOS] CDL Constraints Question

Andrew Lunn andrew@lunn.ch
Wed Mar 29 21:35:00 GMT 2006


On Wed, Mar 29, 2006 at 12:03:05PM -0800, Jay Foster wrote:
> I have a CDL package that contains a cdl_interface (call it CYGINT_X) and a
> boolean cdl_option (call it CYGOPT_X).  The cdl_option is only active when
> the cdl_interface is implemented (active_if CYGINT_X).
> 
> It is valid to have 0, 1, 2, or more implementors of CYGINT_X.
> 
> For another cdl_option, I would like to add some kind of constraint
> (requires statement?) that does the following:
> 
> 	If the CGYINT_X is implemented by one or more implementors (CYGINT_X
> > 0), require CYGOPT_X to be 0 (false).
> 	if the CYGINT_X interface is not implemented, then don't care about
> CYGOPT_X (it is not active anyway).

Try

CYGINT_X implies CYGOPT_X == 0

http://ecos.sourceware.org/docs-latest/cdl-guide/language.values.html#LANGUAGE.EXPRESSION

        Andrew


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