Hi Guillame,
Guillaume Martin wrote:
Hi,
I'd like to express constrained values such the following, where "c" has
the same value as "a".
The problem is the value of "a" is unkown until the runtime.
A ::= INTEGER( 1 | 2 )
MySequence ::= SEQUENCE {
a A,
b INTEGER,
c A(a)
}
Is it possible and is it the right way to do ?
It's possible, but only by enumerating the cases, like so:
MySequence ::= SEQUENCE {
a A,
b INTEGER,
c A
} (WITH COMPONENTS { ..., a(1), c(1) } |
WITH COMPONENTS { ..., a(2), c(2) })
That's okay as long as A is restricted to a small set of values.
If A is unconstrained then there isn't a way to express the constraint
in a machine processable fashion.
If "c" is always the same as "a" then why you need to have "c" at all ?
Regards,
Steven
Thanks.
Guillaume Martin
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