Method toGeneral

basex-core/src/main/java/org/basex/query/expr/CmpV.java:82–87

Tries to rewrite this expression to a general comparison. @param cc compilation context @param single operands must yield single values @return general comparison or original expression @throws QueryException query exception

(final CompileContext cc, final boolean single)

   * @throws QueryException query exception
   */
  private Expr toGeneral(final CompileContext cc, final boolean single) throws QueryException {
    final Expr expr1 = exprs[0], expr2 = exprs[1];
    final SeqType st1 = expr1.seqType(), st2 = expr2.seqType();
    final Predicate<SeqType> p = st -> single ? st.one() : st.zeroOrOne();
    return p.test(st1) && p.test(st2) ? new CmpG(info, expr1, expr2, op).optimize(cc) : this;
  }

  @Override
  public Item item(final QueryContext qc, final InputInfo ii) throws QueryException {