On 04.10.2011, at 19:16, Erlis Vidal wrote: > Thanks Bert! > > The byte code has the answer, I thought that the byte code will map the > source code but I see that's not the case, probably to ensure some > optimizations.. or to do that "jump" I don't know how to do that in smalltalk
For ifTrue: it is purely an optimization, yes. It would work fine by actually sending that message. It would just be slower. In the case of whileTrue:, however, it's not just an optimization. The only way to do loops otherwise would be by recursion. But the Squeak VM does not do tail-call elimination, so it would run out of space pretty soon. Generating the loop as a byte code back jump is essential for the system to work. - Bert - _______________________________________________ Beginners mailing list Beginners@lists.squeakfoundation.org http://lists.squeakfoundation.org/mailman/listinfo/beginners
