On Thursday 29 September 2016 10:49:03 Graeme Geldenhuys wrote: > On 2016-09-29 06:42, Martin Schreiber wrote: > > abcintf:= iabc(abc); > > " > > which has the best performance. > > But you must still remember to check if abcintf has been successfully > assigned. > There will be a compiler error if "abc" does not implement "iabc".
> [personal opinion] > Hence I still prefer the Supports(..) call as it can be used directly in > a boolean expression, the name itself makes it very clear what you are > asking from the code, and it just reads better. > Step through the code with F7 and you will see what overhead it means. AFAIK the compiler does not optimise for compiletime known case. Martin _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/cgi-bin/mailman/listinfo/fpc-pascal
