Coding Emacs's M-x in Lisp

http://aaronhawley.livejournal.com/26901.html

by keyist • 17 years ago

29 6 17 years ago

aaronhawley.livejournal.com

aerique• 17 years ago

I don't know about anything Emacs internals but what a strange remark: "I recently wanted to change how `M-x' works. The command behind it is called `execute-extended-command'. It is written in C. This is disappointing for my desires to tinker, but not all together surprising either. It is a pretty central piece of the Emacs infrastructure."

It being a central piece of infrastructure I would expect it to be written in a higher level language for better maintainability.

alextp• 17 years ago

But since it is a pretty stable and simple structure it is written in a lower level language for either stability or performance or opacity.

jrandom2• 17 years ago

    (if (and (not (null suggest-key-bindings))

My C-oriented brain screams bloody murder at this. (I still want to learn Clojure.)

shaunxcode2• 17 years ago

It's because you are missing the other part of the and

  (if (and (not (null suggest-key-bindings))
           (null executing-kbd-macro)) 

  if(not(null(suggest-key-bindings)) && null(executing-kbd-macro))

Does that help?

jrandom2• 17 years ago

No. I mean, I understand it just fine, I just hate the structure of it. Something about it causes revulsion, something that would probably go away if I actually sat down and learned lisp.

Coding Emacs's M-x in Lisp

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