"regex": "^listener(?=\\.).*?\\.http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "http_conn_manager_prefix",
        "regex": "^http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "listener_address",
        "regex": "^listener\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {

        "regex": "^listener(?=\\.).*?\\.http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "http_conn_manager_prefix",
        "regex": "^http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "listener_address",
        "regex": "^listener\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {

	d := '.'  // digit, one of '_', '0' (a digit), or '.' (anything else)
	i := 0

	// a prefix counts as a digit
	if len(x) >= 2 && x[0] == '0' {
		x1 = lower(rune(x[1]))
		if x1 == 'x' || x1 == 'o' || x1 == 'b' {
			d = '0'
			i = 2
		}
	}

	// mantissa and exponent
	for ; i < len(x); i++ {
		p := d // previous digit
		d = rune(x[i])
		switch {
		case d == '_':

      int digit = Character.digit(string.charAt(pos), radix);
      if (digit == -1) {
        throw new NumberFormatException(string);
      }
      if (pos > maxSafePos && ParseOverflowDetection.overflowInParse(value, digit, radix)) {
        throw new NumberFormatException("Too large for unsigned long: " + string);
      }
      value = (value * radix) + digit;
    }

    return value;
  }

	// B ~ (z0, z1, z2), such that the product leading digit has the exponent -64.
	// Note, exp >= 50 since x >= reduceThreshold and exp < 971 for maximum float64.
	digit, bitshift := uint(exp+64)/64, uint(exp+64)%64
	z0 := (mPi[digit] << bitshift) | (mPi[digit+1] >> (64 - bitshift))
	z1 := (mPi[digit+1] << bitshift) | (mPi[digit+2] >> (64 - bitshift))
	z2 := (mPi[digit+2] << bitshift) | (mPi[digit+3] >> (64 - bitshift))

        "regex": "^listener(?=\\.).*?\\.http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "http_conn_manager_prefix",
        "regex": "^http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "listener_address",
        "regex": "^listener\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {

        "regex": "^listener(?=\\.).*?\\.http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "http_conn_manager_prefix",
        "regex": "^http\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {
        "tag_name": "listener_address",
        "regex": "^listener\\.(((?:[_.[:digit:]]*|[_\\[\\]aAbBcCdDeEfF[:digit:]]*))\\.)"
      },
      {

    }

    @AfterTemplate
    CharMatcher after() {
      return CharMatcher.ascii();
    }
  }

  class Digit {
    @BeforeTemplate
    CharMatcher before() {
      return CharMatcher.DIGIT;
    }

    @AfterTemplate
    CharMatcher after() {
      return CharMatcher.digit();
    }
  }

  class JavaDigit {
    @BeforeTemplate
    CharMatcher before() {
      return CharMatcher.JAVA_DIGIT;

// prefix and an adjacent digit, and between successive digits; such
// underscores do not change the value of the number, or the returned
// digit count. Incorrect placement of underscores is reported as an
// error if there are no other errors. If base != 0, underscores are
// not recognized and thus terminate scanning like any other character
// that is not a valid radix point or digit.
//

				rst.fail("unterminated punycode")
			}

			var digit byte
			d := encoding[pos]
			pos++
			switch {
			case '0' <= d && d <= '9':
				digit = d - '0' + 26
			case 'A' <= d && d <= 'Z':
				digit = d - 'A'
			case 'a' <= d && d <= 'z':
				digit = d - 'a'
			default:
				rst.fail("invalid punycode digit")
			}

			i += int(digit) * w
			if i < 0 {
				rst.fail("punycode number overflow")