[fpc-devel] Explanation about code page-aware AnsiStrings
pascaldragon at googlemail.com
Wed Jan 8 20:56:09 CET 2014
On 08.01.2014 19:57, Hans-Peter Diettrich wrote:
> Sven Barth schrieb:
>> Am 08.01.2014 15:58 schrieb "Hans-Peter Diettrich"
>> <DrDiettrich1 at aol.com <mailto:DrDiettrich1 at aol.com>>:
>> > Delphi concatenates RawByteStrings to the dynamic encoding of the
>> *first* string, the appended strings eventually are converted before
>> concatenation. Special handling of strings with the same encoding is
>> not required.
>> > I.e. the result is *not* always a CP_ACP string, as documented in
>> the wiki.
>> Would you be so kind to provide a simple test case for this? :)
> function test(a,b: RawByteString): RawByteString;
> Result := a+b;
> u: UTF8String;
> a: AnsiString;
> a := 'äöü';
> u := 'üöä';
> test(a,u); //CP_ACP
> test(u,a); //UTF-8
> It looks to me, however, that no conversion occurs at all!
> The strings are only concatenated as they are.
> Same for a concatenation of (global) RawByteString variables.
> This of course were not a desireable implementation :-(
I'm inclined to say "of course", because in your "test" function you are
concatenating two RawByteStrings which - by definition - don't do any
More information about the fpc-devel