[fpc-devel] simple UTF tests
DrDiettrich1 at aol.com
Fri Jan 6 11:42:16 CET 2012
Michael Schnell schrieb:
> On 01/05/2012 12:32 PM, Marco van de Voort wrote:
>> In our previous episode, Michael Schnell said:
>>> I found that the length of an "AnsiString(CP_UTF16)" is given in terms
>>> of bytes and not of Words. Is this like it should ?
>> Yes. Afaik that is not a sane combination, but Delphi compatible.
> This really is absolutely insane, as in Delphi (I only have "Turbo"),
> the length of a WideString is given in terms of word and not of bytes.
This is absolutely sane, because Length() does and always did reflect
the number of *elements* of an array, and strings are treated like arrays.
> So why introducing major differences in the handling of 16 bit encoded
> Strings such as
> - AnsiString(CP_UTF16) (provided CP_UTF16 is previously defined to be
This one is not supported by Delphi (XE).
> - WideString
This one is required for WinAPI compatibility.
> - UnicodeString (I can't test this)
That's the new generic string type.
For people who like it ;-)
> I feel that much of the Delphi way of handling the "new string"s is
> hazardous and not worth mimicking and better ways can be found - there
> have been long discussions on this - (while of course for compatibility,
> it is important to provide the Delphi-way behavior forced by a compiler
The Delphi devlopers have learned what's a good and what's a bad
stringhandling model, based on their experience with the Delphi
implementation and use. You instead argue based on half-baked ideas, so
please stay away from calling other models "insane" :-]
> (BTW.: I still don't know whether Delphi even introduces the insanity
> that when assigning, the auto-conversion is decided regarding the actual
> internal dynamical encoding of the target or if the target's statically
> given Type name is always used.)
You should understand the difference between (temporary) strings, used
in string expression evaluation, and the assignment of an string to a
strictly typed variable.
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