edebug-instrument-function should try harder

[Hannu Koivisto]

Greetings,

In Emacs 20.7 Edebug can't instrument a function with
edebug-instrument-callee or "i" jump binding unless it has already
seen it via eval-region or other similar command that Edebug
redefines to record function positions.  At the end of the
edebug-instrument-function in edebug.el there is a note ";; We
could try harder, e.g. do a tags search."  Practically every time
I've used edebug, I've wished there would be such a feature.  Will
Emacs 21 try harder?  If not, I hereby request this feature.

I'd prefer it to work so that I can optionally configure a specific
tags file for this purpose (which it should use "locally" and not
mess user's current tags table and tag ring).  If such tags file is
not configured, it should automatically try current tags table (and
if one is not visited, ask user to visit one just like find-tag
does).

-- 
Hannu