Eric Bezault wrote:
> If you keep using `s.area.item', then Peter, who wants to use
> these features, won't be able to use them because he is also
> using UC_STRING.
I've gone back and looked at how I'm using UC_STRING.
On .NET I don't use UC_STRING at all (except indirectly, via other Gobo
classes), because I use native .NET classes to convert between STRING_8 and
SYSTEM_STRING (see
http://www.eiffelroom.com/blog/peter_gummer/utf_8_in_net_revisited).
In classic Eiffel, I use UC_STRING only as a local variable within one
routine:
feature -- Unicode
utf8 (utf8_bytes: STRING): STRING_32
-- `utf8_bytes' converted from a sequence of UTF-8 bytes to 32-bit
Unicode characters.
require
utf8_bytes_attached: utf8_bytes /= Void
utf8_bytes_valid: (create {UC_UTF8_ROUTINES}).valid_utf8 (utf8_bytes)
local
s: STRING
do
create {UC_UTF8_STRING} s.make_from_utf8 (utf8_bytes)
Result := s.as_string_32
ensure
attached: Result /= Void
not_longer: Result.count <= utf8_bytes.count
end
In other words, I use STRING_8 everywhere. I use UC_STRING only as an
encoder, to give me 32-bit Unicode strings for input to Vision2 routines.
(Rather inefficiently too!)
The current implementation of starts_with and ends_with may be incorrect,
but they meet my current needs.
- Peter Gummer
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