3 ms·

Agreed on both recommendations. It's a pity that further standardisation stalled; the MOP would make a good addition.

• PuercoPop 12y ago
  And that the ideas of 'self-extensibilty' & intersession haven't been further developed. IIUC one can change a class metaclass in Pharo/Smalltalk but not in CLOS. Rhodes idea of extensible specializers seems very useful
• lispm 12y ago
  Most current implementations support the MOP.