Hello I am trying to bring a string into an object structure. The string look like “ name[1..2] name[1..2] name[1..2] “. So i have three blocks and the second two are optional. I just want to sort this three substrings into three nearly the same rules. Only the semantic action are different. I am trying something like that: “: i0=getAssociationEndName() {a0.setIdentifiableElement(i0); a.set(0,a0);} (i1=getAssociationEndName(){a1.setIdentifiableElement(i1); a.set(1,a1);})? ( i2=getAssociationEndName(){a2.setIdentifiableElement(i2); a.set(2,a2);} )? ; “ If I use more the one question mark, then it does not work. I need that order. Pleas help me with that trivial problem   More>>