[fpc-pascal] Weird string behavior

Jonas Maebe jonas.maebe at elis.ugent.be
Fri Jul 22 17:56:32 CEST 2016

On 22/07/16 17:33, Santiago A. wrote:
> So
>   ResultA := AnsiToUTF8(AnsiStrA + AnsiStrA);  // UTF-8   ResultB :=
> AnsiToUTF8(AnsiStrA) + AnsiToUTF8(AnsiStrA); // Win-1252
> And resultA is not equal to ResultB
> It doesn't look like too intuitive.

It would be good if someone with access to Delphi 2009+ could test this. 
It is possible that the result of concatenating two RawByteStrings 
should again be a RawByteString and that hence no conversion should 
happen on assignment here either.

> I would say that it is closer to "hidden secret knowledge" than to the
> "Principle of least surprise".

There is no hidden secret knowledge. Everything is documented and the 
information is linked from the release notes. The "principle of least 
surprise" has been applied in the sense that we didn't invent our own 
system that introduces small or large differences compared to how Delphi 
behaves in the same situation (and if there are differences, then those 
are bugs in our implementation).


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