Am 30.07.2011 19:27, schrieb Bernd: > 2011/7/30 Florian Klaempfl <flor...@freepascal.org>: > >> The automatic constructor/destructor concept of C++ causes the same >> overhead. And the overhead for a function or operator overloading based >> approach is the same imo. Or do you have any example where a function >> based approach performs better? Overloaded operators are converted into >> function calls, there is no real difference. > > I didn't intend to mean it is better solved in C++ (or any other > language), I didn't want to specifically criticize the Operator > overloading how it is implemented in Object Pascal, I just spent some > time experimenting with trying to wrap this bignum library in some > clever way to make it look and behave nicely. I posted this thread > only because at some point I realized that whatever I do to make it > behave like a built in type it becomes slow and ineffective and the > wrapper becomes big and complicated. > > The reason is because it IS a function call. > > A := B + C; > > A := add(B, C); > > This will create a new A and free the old one. I have no idea how to > prevent this. > > add(A, B, C); > > with var or out arguments would enable me to re-use the existing A.
This is exactly what ref. counting solves? Did you read my other mail regarding your problem with ref. counting? _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
