add toc-style functionality to clouds/parcels
Can currently write to an objectRegistry, but cannot otherwise ascertain which fields a cloud would normally write.
Add a classes() method similar to what objectRegistry and IOobjectList have. However, it is probably inconvenient to have the matcher predicate.
In the cloud:
template<class CloudType>
void queryClasses(const CloudType&, HashTable<wordHashSet>& classes) const
{
classes(IOField<label>::typeName).insert
({
"active",
"typeId",
});
classes(IOField<scalar>::typeName).insert
({
"nParticle",
"d",
"dTarget",
"rho",
"age",
"tTurb",
});
...
}