On 4/25/2012 6:55 AM, Juanma Barranquero wrote:
Ada 2012 is adding (quoting from the ARM):
A.4.11 String Encoding
[...]
{AI05-0137-2} {AI05-0262-1} The type Encoding_Scheme defines encoding
schemes. UTF_8 corresponds to the UTF-8 encoding scheme defined by
Annex D of ISO/IEC 10646. UTF_16BE corresponds to the UTF-16 encoding
scheme defined by Annex C of ISO/IEC 10646 in 8 bit, big-endian order;
and UTF_16LE corresponds to the UTF-16 encoding scheme in 8 bit,
little-endian order.
I would suggest that the folks working on Ada 2012 (presumably a new
edition of ISO/IEC 8652:1995) get themselves an
updated copy of 10646, and specifically ISO/IEC 10646:2011:
http://www.iso.org/iso/iso_catalogue/catalogue_tc/catalogue_detail.htm?csnumber=51273
The second edition, which supersedes 10646:2003, and which incorporates
7 published
amendments (and Amd 8, which was not separately published), no longer
defines UTF-8 in Annex D or UTF-16 in Annex C. The UTF-8 encoding form is
now defined in Clause 9.1. The UTF-16 encoding form is defined in Clause
9.2.
And the encoding schemes are defined in Clause 10.
I know it takes awhile for implementations to catch up with standards,
but it
would be a shame if a 2012 revision of the Ada *standard* ends up referring
to a 9-year old and outdated version of 10646 to get its definitions of
UTF-8 and UTF-16.
--Ken
