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# Old McCarthy Had a Form
Ian Eure



Name Pronunciation: (EE-un YOU-r)

Pronouns: he/him/his

Preferred contact info: ian@retrospec.tv / ieure on Libera

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Most practical languages are multi-paradigm, offering several
abstractions for the programmer.  But did you know that Emacs Lisp
comes with a powerful system for object-oriented programming? Join me
for a discussion of EIEIO, and learn how it can help you write more
modular, flexible Emacs Lisp.



# Outline

-  What is EIEIO?
-  Why OOP?
-  The CLOS Model
    -  Classes
    -  Generic Functions
    -  Methods
    -  Specialization
    -  Method Qualifiers
    -  Multiple Inheritance
    -  Nice Properties
-  Practical Examples
    -  Encapsulation
        -  Example: `transmission.el`
    -  Abstraction
        -  Example: `sql.el`
    -  Extensibility
        -  Example: comint
-  Conclusion


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