[Rd] for loop wiht S4 Objects

Hi all, I'm working with the S4-Class system and I have a little problem with Implementing iteration functionality in my S4 class but it don't work: setClass(foo,representation(bar=list)) x - new(foo,bar=list(1,2,3)) for(e in x) cat(e) invalid type/length (S4/1) in vector

[Rd] pass by reference for S4

Hi all; Is it possible to modify the @ operator that it can handle references (or external pointers) of S4 Object instead of the real Objects? Or is there any technical or compatibility issue which make it impossible? I look forward to hear from you and also hope that you don't hate