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Examples of ''Self-Extension'':
 
Examples of ''Self-Extension'':
 
* forth immediate words: adds new syntax to forth.
 
* forth immediate words: adds new syntax to forth.
* forth words implemented in assembly: e.g. in stone knife forth <code>: compile-minus 41 . 4 . 36 . 88 . ; ( `sub %eax, [%esp]; pop %eax` )</code>
 
 
* lisp macro definitions: allows you to add new language constructs to lisp.
 
* lisp macro definitions: allows you to add new language constructs to lisp.
 
* lisp reader: implement only a basic reader in the core, use it to read in and make use of a much more comprehensive lisp reader from then on (MES does this).
 
* lisp reader: implement only a basic reader in the core, use it to read in and make use of a much more comprehensive lisp reader from then on (MES does this).
  
 
any more?
 
any more?

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