is_deleted_node()
can be used to check if the node referenced by the iterator is still
part of the map, or has been deleted by a call to insert_or_replace()
or erase().
If the return value is false
then it cannot be relied upon to remain false
if other threads may be erasing elements concurrently. Once the return
value is true for a given
iterator instance, then it will remain true
until a new value is assigned to that iterator.
A deleted node may still be accessed through an iterator that refers to it, but it is not reachable from any operation on the map.
bool is_deleted_node() const;
true if the element
referred to by *this has been removed from the
associated jss::concurrent_map instance,
false otherwise.
Nothing.
#include <jss/concurrent_map.hpp>