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bug#27270: display-raw-bytes-as-hex generates ambiguous output for Emacs

From: Eli Zaretskii
Subject: bug#27270: display-raw-bytes-as-hex generates ambiguous output for Emacs strings
Date: Sat, 10 Jun 2017 10:24:25 +0300

> Cc: address@hidden, address@hidden,
>  address@hidden
> From: Paul Eggert <address@hidden>
> Date: Fri, 9 Jun 2017 16:44:46 -0700
> The idea is to add a new \X escape for character constants and strings. This 
> escape would allow at most two hexadecimal digits, rather than the unlimited 
> number of digits that \x does. For example, the Lisp string "\XABC" would be 
> equivalent to the Lisp string "\xAB\ C", that is, it would be a two-character 
> string containing the character U+00AB LEFT POINTING GUILLEMET followed by 
> the 
> character U+0043 LATIN CAPITAL LETTER C.

So your proposal would mean a change to the Lisp reader to support
such escapes, right?  If so, isn't such a change

> Also, display-raw-bytes-as-hex would cause raw bytes to be displayed with 
> this 
> new X escape, rather than with with the x escape.

It could only do that for codepoints below 256 decimal, so that
limitation should be taken into account when deciding on the proposal.

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