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authorSacha Chua <sacha@sachachua.com>2021-12-02 12:46:03 -0500
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@@ -28,6 +28,40 @@ modular, flexible Emacs Lisp.
IRC nick: ieure
+- Q2: AFAIK, EIEIO is generally slower than, e.g. cl-defstructs.  When
+ do you think EIEIO is not suitable for performance reasons?
+ - A: I agree with Dmitry: first make it work, then make it fast. 
+ I don\'t think there\'s a blanket reason not to use EIEIO, but
+ definitely profile if you\'re using it in a performance-critical
+ context.  EXWM is one project that uses EIEIO extensively and
+ seems to perform well, so I don\'t think it\'s off-limits for
+ performance-critical code.
+- Q3: Do you have any tips about introspection?  e.g. IIRC there\'s an
+ EIEIO introspection facility, though it may be somewhat primitive.
+ - A: It is somewhat primitive, but seems to work okay
+ (<https://www.gnu.org/software/emacs/manual/html_node/eieio/Introspection.html)>. 
+ I haven\'t found a need for anything fancier (yet).
+- Q4: Have you used any of the EIEIO-related serialization tools? 
+ IIRC there are some limitations with regard to printable/readable
+ values.
+ - A: I haven\'t had call for this, but
+ <https://www.gnu.org/software/emacs/manual/html_mono/eieio.html#eieio_002dpersistent>
+ is the mechanism (for anyone wondering)
+- Q5: I did not get how generic functions can work with non class
+ objects
+ - A: Dynamic dispatch is very powerful!
+- Q6:So with that Emacs is on pair with Smalltalk development
+ environments now (?)
+ - A: Not very familiar
+- Q7: Most of what you presented can be done without \`defclass\`. 
+ AFAICT, the only exception is \*multiple\* inheritance (since
+ \`cl-defstruct\` also supports single inheritance via \`:include\`).
+ - A: Yes, you can mix and match structs/objects or any other
+ type.  You need classes if you want the EIEIO customization
+ editing facility or MI.  I think also \`initialize-instance\` is
+ class-only, so you need classes if you have to do some kinds of
+ complex (cross-slot) initializtaion.
+
- I didn't know that custom.el works with EIEIO that way, very nice
- Dang Ian. What a talk, great demos.
- Wow, that's a great talk.
@@ -45,7 +79,11 @@ IRC nick: ieure
- ieure: This is the thing that implements (thing (eql :whatever)) specialization, should be a good starting point if you want (thing (string-match-p "^foo")): <https://git.savannah.gnu.org/cgit/emacs.git/tree/lisp/emacs-lisp/cl-generic.el#n1164>
- thanks for the pointer, but I think I have some more pressing cl-defgeneric reimplementations to make before I touch that
- ieure: Extremely fair. One thing I didn't get to touch on is that you can extend generic functions from anywhere. So you don't have to patch up cl-generic.el, you can define a new method for a generic function defined anywhere, in any file. Which rules.
+- This is not a question: Brilliant title for the presentation. :)
+
+Links:
+- <https://www.gnu.org/software/emacs/manual/html_mono/eieio.html>
# Outline
- What is EIEIO?