On Sat, Jan 9, 2021 at 5:12 PM Yuriy Sydorov via fpc-pascal <fpc-pascal@lists.freepascal.org> wrote:
> > 2. Is it OK if the elements of the array are (or contain) managed types? > > You need to manually finalize/free elements which are overwritten before > calling Move. So, if I move Arr[3] to Arr[1], I first have to finilize/free Arr[1]. After that move the bytes in Arr[3] are exactly the same as in Arr[1] (by definition of how move works) AFAIU. Is that a problem with refcounts, because they would be the same also but the number of copies increased? > Also if you intend to use Move for duplication of elements of managed types, > it is better to use for-loop to copy each > element separately to allow proper increments of references. > > > 3. Are there caveats if T is a specialization of a generic type definition? > Thanks for explaning. OK, since this is a generic class, Systme.Move() can be safe, but it is not guaranteed (almost by definition you never know what <T> is going to be in the specialization. So, I'll use a for loop to copy the data. I assume that doing Arr[Index] := Default(T) will also finalize the element if that element ismanaged? -- Bart _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org https://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
