help-gnu-emacs
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

What does the coding system nil mean?


From: Jesper Harder
Subject: What does the coding system nil mean?
Date: Sat, 24 Jan 2004 23:13:38 +0100
User-agent: Gnus/5.110002 (No Gnus v0.2) Emacs/21.3.50 (gnu/linux)

  (coding-system-p nil) => t

OK, so nil is a coding system.

But I can't find any documentation about what it means to supply nil
to functions that take a coding system (`encode-coding-string' etc.),
and `describe-coding-system' refuses to describe the nil coding
system.

Hmm, `encode-coding-string' promises to set `last-coding-system-used'
... yet if you supply nil, it doesn't change the previous value of the
variable.

So, can anyone explain what a nil coding system means?


reply via email to

[Prev in Thread] Current Thread [Next in Thread]