/**
* Copies this expression's return type and size to the given expression.
*
* @param <T> expression type
* @param ex expression
* @return the expression for convenience
*/
protected final <T extends ParseExpr> T copyType(final T ex) {
ex.seqType = seqType;
ex.size = size;
return ex;
}
/**
* Copies fields to the given object.
*
* @param <T> object type
* @param p copy
* @return the copy
*/
protected final <T extends Preds> T copy(final T p) {
p.last = last;
p.pos = pos;
return copyType(p);
}