- commonly used, only depends on routines defined in UList
(don't need the rest of ListOps for it).
ENH: implement boolList::operator() const
- allows use as a predicate functor, as per bitSet and labelHashSet
GIT: combine SubList, UList into List directory (intertwined concepts)
STYLE: default initialize DynamicList instead of with size 0
- provide key_iterator/const_key_iterator for all hashes,
reuse directly for HashSet as iterator/const_iterator, respectively.
- additional keys() method for HashTable that returns a wrapped to
a pair of begin/end const_iterators with additional size/empty
information that allows these to be used directly by anything else
expecting things with begin/end/size. Unfortunately does not yet
work with std::distance().
Example,
for (auto& k : labelHashTable.keys())
{
...
}
