On Sat, 5 Feb 2011, Bo Berglund wrote:
On Sat, 5 Feb 2011 09:24:44 +0100 (CET),
michael.vancann...@wisa.be wrote:
No. Someone misunderstands the concept of dynamic array here.
A "dynamic array" is a pointer to an array in memory.
So when passing a dynamic array to a function,
you are, in fact, passing a pointer.
So is there a difference here between Delphi7 and FPC?
No.
So in effect it means that all of these calls are exactly the same:
FillArr(const Arr: TByteArr)
FillArr(var Arr: TByteArr)
FillArr(Arr: TByteArr)
At least as long as the FillArr function does not attempt to change
the ponter itself like this:
Arr := SomeOtherArr;
Indeed.
In which case I guess that the only version that will carry this back
to the caller is the var version?
Yes.
But that is not what I am doing at all, so I can stick with a simple:
FillArr(Arr: TByteArr)
and be sure that I will not get back a different array, but instead
get my array filled as requested...
It should, yes.
Michael.
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