a POSIX process ID
| std_types::object | the prototype object for all "normal" objects |
| std::getpid | returns the process ID |
| std::getppid | returns the parent process ID |
| std::deserializer_of | constructs a process id from a serialization string |
| std::serialization_tag_of | the serialization tag for process ids |
| std::equal | compares two process ids for equality |
| std::hash | returns an integer hash value for a process id |
| std::is_a_process_id | process ids are process ids |
| std::serialize | serializes a process id |
| std::to_integer | returns an integer value representing the process id |