Re:Paul Graham on SICP (2000)
by cup-of-tea on Thursday August 02, 2018 @05:09AM
(#17670172)
Very true. And the most mind blowing thing? CLOS is implemented in Lisp itself using macros. So as a Lisp user, you are able to extend the language to include the best implementation of any particular paradigm that exists.
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> CLOS is implemented in Lisp itself using macros.
This is a persistent myth. CLOS is built in to the language.
Somehow.
The original first CLOS implementation called PCL (Portable CommonLoops) was written in 100% Common Lisp with very little implementation specific CL code. PCL was a library which ran on at least 15 different Common Lisp implementations.
What really is a myth that it's (only) macros. That CLOS implementation is a complex library written as data types, functions, macros, ... and which was bootstrapped to be partly written in itself using classes, method, generic functions, ...
See for example: https://github.com/binghe/PCL