[m-rev.] for post-commit review: announce unicode escape sequences

[Ian MacLarty]

On Mon, Jun 06, 2011 at 12:14:55AM +1000, Julien Fischer wrote:
> 
> For post-commit review by anyone.
> 
> Branches: main
> 
> NEWS:
> 	Announce the \u and \U escape sequences for Unicode characters
> 	in string literals.
> 
> Julien.
> 
> Index: NEWS
> ===================================================================
> RCS file: /home/mercury/mercury1/repository/mercury/NEWS,v
> retrieving revision 1.582
> diff -u -r1.582 NEWS
> --- NEWS	2 Jun 2011 07:20:53 -0000	1.582
> +++ NEWS	5 Jun 2011 14:08:59 -0000
> @@ -8,6 +8,12 @@
> 
>  * The `char' type now represents a Unicode code point.
> 
> +* Unicode characters can now be encoded in string literals using an
> +  escape sequence.  The escape sequence \uXXXX (or \UXXXXXXXX), where XXXX
> +  (or XXXXXXXX) is a Unicode character code in hexadecimal, is replaced with
> +  the corresponding Unicode character.  The UTF-8 encoding is used to represent
> +  the Unicode character.
> +

That last sentence only applies to the C backends.  Is it necessary
anyway?  Obviously the unicode character is going to be represented in
whatever encoding is used for strings on the current backend.

Ian.
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