}
	readDataInto := func(dst []byte, s ws.State, want ws.OpCode) ([]byte, error) {
		dst = dst[:0]
		for {
			hdr, err := wsReader.NextFrame()
			if err != nil {
				return nil, err
			}
			if hdr.OpCode.IsControl() {
				if err := controlHandler(hdr, &wsReader); err != nil {
					return nil, err
				}
				continue
			}
			if hdr.OpCode&want == 0 {
				if err := wsReader.Discard(); err != nil {
					return nil, err

pkg unicode, const UpperCase ideal-int
pkg unicode, const UpperLower ideal-char
pkg unicode, const Version ideal-string
pkg unicode, func Is(*RangeTable, int32) bool
pkg unicode, func IsControl(int32) bool
pkg unicode, func IsDigit(int32) bool
pkg unicode, func IsGraphic(int32) bool
pkg unicode, func IsLetter(int32) bool
pkg unicode, func IsLower(int32) bool
pkg unicode, func IsMark(int32) bool