Hi,

I've seen several online articles about writing Domain Specific  
Languages in Ruby. All the articles mention that the idea of DSLs  
comes largely from Lisp and Smalltalk. I've found descriptions on  
writing DSLs in Lisp--but I can't seem to find any good references  
for Smalltalk.

Does anyone have any helpful pointers? If I'm going to follow the  
Ruby model, then I need to be able to execute arbitrary strings as  
code (which Compiler evaluate: and related functions seems to  
handle). I also need to be able to add new methods to classes/ 
instances at runtime--which I haven't found.

Any help would be greatly appreciated.

-Rich-