c := Class(p.entry & 0x0F)
	if c == Control {
		c = controlByteToClass[p.last&0xF]
	}
	return c
}

// IsBracket reports whether the rune is a bracket.
func (p Properties) IsBracket() bool { return p.entry&0xF0 != 0 }

// IsOpeningBracket reports whether the rune is an opening bracket.
// IsBracket must return true.
func (p Properties) IsOpeningBracket() bool { return p.entry&openMask != 0 }

			return bytecount, nil
		}
		p.types = append(p.types, cls)
		if props.IsOpeningBracket() {
			p.pairTypes = append(p.pairTypes, bpOpen)
			p.pairValues = append(p.pairValues, r)
		} else if props.IsBracket() {
			// this must be a closing bracket,
			// since IsOpeningBracket is not true
			p.pairTypes = append(p.pairTypes, bpClose)
			p.pairValues = append(p.pairValues, r)
		} else {