Description paul lu 2017-01-05 02:38:44 EST

while(a?.b?.c != null){
           
        }
is translated to : 
    B _b = null;
    if (a!=null) {
      _b=a.getB();
    }
    C _c = null;
    if (_b!=null) {
      _c=_b.getC();
    }
    boolean _notEquals = (!Objects.equal(_c, null));
    boolean _while = _notEquals;
    while (_while) {
      Integer _limit = a.getLimit();
      InputOutput.<Integer>println(_limit);
      C _c_1 = null;

      //error: a?.b is not evaluated again 

      if (_b!=null) {
        _c_1=_b.getC();
      }
      boolean _notEquals_1 = (!Objects.equal(_c_1, null));
      _while = _notEquals_1;
    }