*
   * @param escaper the instance to be wrapped
   * @return a UnicodeEscaper with the same behavior as the given instance
   * @throws NullPointerException if escaper is null
   * @throws IllegalArgumentException if escaper is not a UnicodeEscaper or a CharEscaper
   */
  static UnicodeEscaper asUnicodeEscaper(Escaper escaper) {
    checkNotNull(escaper);
    if (escaper instanceof UnicodeEscaper) {

          destIndex += charsSkipped;
        }
        if (escaped.length > 0) {
          System.arraycopy(escaped, 0, dest, destIndex, escaped.length);
          destIndex += escaped.length;
        }
        // If we dealt with an escaped character, reset the unescaped range.
        unescapedChunkStart = nextIndex;
      }
      index = nextEscapeIndex(s, nextIndex, end);
    }

		t.Errorf("Table with escape character, got %v", r.Statement.SQL.String())
	}

	r = dryDB.Table("user as u").Select("name").Find(&User{}).Statement
	if !regexp.MustCompile("SELECT .name. FROM user as u WHERE .u.\\..deleted_at. IS NULL").MatchString(r.Statement.SQL.String()) {
		t.Errorf("Table with escape character, got %v", r.Statement.SQL.String())
	}

	errExpectedBool      = errors.New("expected bool")
	errLikeNonStrArg     = errors.New("LIKE clause requires string arguments")
	errLikeInvalidEscape = errors.New("LIKE clause has invalid ESCAPE character")
	errNotImplemented    = errors.New("not implemented")
)

// AST Node Evaluation functions
//
// During evaluation, the query is known to be valid, as analysis is

    ],

    [
        // unescape, revert step 3 except for back slash
        // For example, if a user escape a '\\*',
        // after step 3, the result will be '\\\\\\*'
        /\\\\\\(?=[$.|*+(){^])/g,
        () => ESCAPE
    ],

    [
        // '\\\\' -> '\\'
        /\\\\/g,
        () => ESCAPE
    ],

    [
        // > The range notation, e.g. [a-zA-Z],

            return escape(s) + ".*";
        }
        final StringBuilder buf = new StringBuilder(100);
        return appendFileterPath(buf, escape(s));
    }

    protected String escape(final String s) {
        if (s.startsWith("#")) {
            return StringUtil.EMPTY;
        }

// Condition           → "NOT" Condition | ConditionExpression
// ConditionExpression → ValueExpression ("=" | "<>" | "<=" | ">=" | "<" | ">") ValueExpression
//                     | ValueExpression "LIKE" ValueExpression ("ESCAPE" LitString)?
//                     | ValueExpression ("NOT"? "BETWEEN" ValueExpression "AND" ValueExpression)
//                     | ValueExpression "IN" "(" Expression ("," Expression)* ")"

                )
                writer.println("<ul>")
                incubatingDescriptions.sorted().forEach { incubating ->
                    writer.println("   <li>${incubating.escape()}</li>")
                }
                writer.println("</ul>")
            }
            writer.println("</body></html>")
        }
    }

    private

      encodings[ 0xb] = encoding // Vertical Tab
      encodings[ 0xe] = encoding // Shift Out
      encodings[ 0xf] = encoding // Shift In
      encodings[ 0x10] = encoding // Data Link Escape
      encodings[ 0x11] = encoding // Device Control 1 (oft. XON)
      encodings[ 0x12] = encoding // Device Control 2
      encodings[ 0x13] = encoding // Device Control 3 (oft. XOFF)

   * invalid or in error.
   *
   * @since 8.0
   */
  public static final byte SUB = 26;

  /**
   * Escape: A control character intended to provide code extension (supplementary characters) in
   * general information interchange. The Escape character itself is a prefix affecting the
   * interpretation of a limited number of contiguously following characters.
   *
   * @since 8.0
   */