Hi Peter!
On 3/15/19 1:24 AM, Peter Levart wrote:
On 3/15/19 9:03 AM, fo...@univ-mlv.fr wrote:
* @since 13
*/
interface Once {}
What do you think of that?
It's not clear to me if an annotation, available at runtime, is not a
better fit.
Anyway, i'm not sure not sure introducing such interface/annotation
worth its maintenance cost, as you said the use case is pretty narrow.
It is narrow, but in a situation like that, where you want to code an
optimal generic algorithm and all you have access to is an Iterable,
there's no other way (short of providing additional methods, which is
ugly). Just think of this situation. You have to decide upfront if you
need to buffer the elements obtained from 1st iteration or not, but
1st iteration always succeeds...
Can you please explain how the interface Once would help to solve this?
If an Iterable does not implement Once, it does not mean it allows
multiple passes, right?
With kind regards,
Ivan
Annotations are not suitable for that as the check has to be quick and
they don't play well with inheritance etc...
Peter
--
With kind regards,
Ivan Gerasimov
