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From: "Eli Zaretskii" <eliz@is.elta.co.il>
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Subject: Re: decode-coding-string and consing
Date: Mon, 10 Feb 2003 22:01:26 +0200
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> Newsgroups: gnu.emacs.help
> From: Jesper Harder <harder@myrealbox.com>
> Date: Mon, 10 Feb 2003 17:47:53 +0100
> 
> ,----[ C-h f decode-coding-string RET ]
> | decode-coding-string is a built-in function.
> | (decode-coding-string STRING CODING-SYSTEM &optional NOCOPY)
> | 
> | Decode STRING which is encoded in CODING-SYSTEM, and return the result.
> | Optional arg NOCOPY non-nil means it is OK to return STRING itself
> | if the decoding operation is trivial.
> `----
> 
> Under what conditions is the decoding operation "trivial"?

If CODING-SYSTEM is nil or such that no encoding is necessary at all.