private Ref _concat(Ref ref) throws PageException {
// &=
if (cfml.forwardIfCurrent('=')) {
cfml.removeSpace();
Ref right = assignOp();
Ref res = new Concat(ref,right);
ref=new Assign(ref,res);
}
else {
cfml.removeSpace();
ref=new Concat(ref,plusMinusOp());
}
return ref;
}