Method test

basex-core/src/main/java/org/basex/query/expr/Expr.java:194–194

Computes the effective boolean value for this expression. @param qc query context @param ii input info (can be null; required for those Value instances that have no input info) @param pos position of context item (if 0, perform EBV test) @return item @throws QueryException

(QueryContext qc, InputInfo ii, long pos)

   * @throws QueryException query exception
   */
  public abstract boolean test(QueryContext qc, InputInfo ii, long pos) throws QueryException;

  /**
   * Tests if this is a vacuous expression (empty sequence or error function).