Re: How to shadow a function temporarily? (flet and cl-flet)

[Emanuel Berg]

Alex Kost <alezost@gmail.com> writes:

> 1. The main question is: how can I override a
> function with another compatible function (with the
> same args) temporarily?

Why do you want to do that? It might help if you tell
us, because there might be other (better) ways to do
what you want.

I don't know of an interface to do that, if you want to
do it habitually, but on a per function-basis, you can
use fset to redefine (set) the functions of symbols:

(fset '+ (lambda (&rest args) (apply '- args)))

And it is "temporary" in the sense that it works as
long as you don't reset it. But if you go around
mucking about like that, I don't know what will break
first - Emacs or your mind. So I don't think you have
to worry about the "temporary" aspect :)

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