On 26 Sep 2014, at 8:24 , Marcus Denker <marcus.den...@inria.fr> wrote:
> > On 25 Sep 2014, at 20:28, Esteban A. Maringolo <emaring...@gmail.com> wrote: > >> 2014-09-25 15:14 GMT-03:00 nacho <0800na...@gmail.com>: >>> Hi, >>> In PBE says that ordinary objects' ivars are passed by references and small >>> integers are passed by value. >>> Is there a way to know if a class is passed by reference or by value? >> >>> Only small integers are passed as value? >> >> Yes. >> >> It has to do with the object headers, SmallIntegers are embedded in the OH. >> > > In the *reference*, not the header. The reference points to a header for a > normal > object, for small-integers the reference *is* the integer value. This means > that > there is no header for the integers. > > Marcus So, a succinct phrasing indifferent to object format, using a relatively well-defined term, would be: Only immediate objects are passed by value. (Which means you have to explain immediate objects, as markus did) Cheers, Henry
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