hash_table-refer

Documentation
- Reference manual
- Packages
  - XPCE
    - Classes
      - class hash_table
        
        Instance variables
        
        hash_table-buckets
        
        hash_table-refer
        
        hash_table-size
        
        hash_table-symbols

hash_table-refer: {none,name,value,both}

Which of the key and the value of an entry create a reference to the object. The default is both. A table created with none refers to neither, which is what a tool that monitors the object base needs: it can hold objects without keeping them alive. Such a table does not know when an entry dies, so the tool must remove entries itself, for example from a class->freed_message.

Pass it as the second initialisation argument:

new(T, hash_table(@default, none))