@uml
Interval objects are used readonly so share all with the
same single value a==b up to some max size. Use an array as a perfect hash.
Return shared object for 0..INTERVAL_POOL_MAX_VALUE or a new
Interval object with a..a in it. On Java.g4, 218623 IntervalSets
have a..a (set with 1 element).
@safe
@uml Interval objects are used readonly so share all with the same single value a==b up to some max size. Use an array as a perfect hash. Return shared object for 0..INTERVAL_POOL_MAX_VALUE or a new Interval object with a..a in it. On Java.g4, 218623 IntervalSets have a..a (set with 1 element). @safe