Method simplifyFor

basex-core/src/main/java/org/basex/query/expr/Union.java:131–141

(final Simplify mode, final CompileContext cc)

  }

  @Override
  public Expr simplifyFor(final Simplify mode, final CompileContext cc) throws QueryException {
    Expr expr = this;
    if(mode.oneOf(Simplify.EBV, Simplify.PREDICATE)) {
      for(final Expr ex : exprs) {
        // boolean(a union <a/>) → boolean(true())
        if(ex.seqType().instanceOf(Types.GNODE_OM) && !expr.has(Flag.NDT)) expr = Bln.TRUE;
      }
    }
    return cc.simplify(this, expr, mode);
  }

  @Override
  public Expr copy(final CompileContext cc, final IntObjectMap<Var> vm) {