RE: [External] : Must prevent switching from recursive edit buffers

[Drew Adams]

I'm not an expert on recursive edit.  But I think
that (apart from the special case of a minibuffer)
a recursive edit isn't in any way buffer or mode
or anything else specific - it's global.

One thing you can do, which doesn't directly
address your question, is to make it more obvious
when you're in a recursive edit, and at what level.

For that, the little library `rec-edit.el' can
help.

Description:

https://www.emacswiki.org/emacs/RecursiveEdit#rec-edit.el

Code:

https://www.emacswiki.org/emacs/download/rec-edit.el