Re: enhanced select-safe-coding-system

["Stefan Monnier" <monnier+gnu/emacs@RUM.cs.yale.edu>]

> Incidentally, I think Emacs should have `remove-if', or whatever
> Common Lisp calls the function for filtering lists according to a
> predicate, as I needed to filter the coding list.  That operation seems
> quite common.

I would agree (I actually use a `partition' function sometimes which
returns two lists: one for elements that matched the predicate and one
for those that didn't, but a CL-style function is just as good).

> If you want to make select-safe-coding-system more helpful, you could
> also use code like this to find at least the first unencodable
> character and display that part of the buffer when
> select-safe-coding-system needs to prompt for a coding system.  Emacs
> 20 used to do something similar, but it was only necessary to check
> charsets then.

I have recently posted a fairly simple patch that does that by slightly
modifying the C code, so it's fast.  The only question is if such
a functionality is good enough to efficiently implement Emacs-20's behavior
(which was to highlight the offending chars, rather than just jump to the
first one)


	Stefan