// resolvePairedBrackets runs the paired bracket part of the UBA algorithm.
//
// For each rune, it takes the indexes into the original string, the class the
// bracket type (in pairTypes) and the bracket identifier (pairValues). It also
// takes the direction type for the start-of-sentence and the embedding level.
//
// The identifiers for bracket types are the rune of the canonicalized opening

		// Strictly speaking, control chars include the range [0x7f, 0x9f], not just
		// [0x00, 0x1f], but in practice, we ignore the multi-byte control characters
		// as it is simpler to inspect the tag's bytes than the tag's runes.
		i = 0
		for i < len(tag) && tag[i] > ' ' && tag[i] != ':' && tag[i] != '"' && tag[i] != 0x7f {
			i++
		}
		if i == 0 {
			return errTagKeySyntax
		}
		if i+1 >= len(tag) || tag[i] != ':' {

	0xee60,
	0xee63,
	0xee6b,
	0xee73,
	0xee78,
	0xee7d,
	0xee7f,
	0xee8a,
	0xeea4,
	0xeeaa,
	0xf0c0,
	0xf0d0,
	0xfabe,
	0xfb93,
}

// isGraphic lists the graphic runes not matched by IsPrint.
var isGraphic = []uint16{
	0x00a0,
	0x1680,
	0x2000,
	0x2001,
	0x2002,
	0x2003,
	0x2004,
	0x2005,
	0x2006,
	0x2007,
	0x2008,
	0x2009,
	0x200a,

		}
		in.readRune()
	}
	in.endToken(_IDENT)
}

// isIdent reports whether c is an identifier rune.
// We treat most printable runes as identifier runes, except for a handful of
// ASCII punctuation characters.
func isIdent(c int) bool {
	switch r := rune(c); r {
	case ' ', '(', ')', '[', ']', '{', '}', ',':
		return false
	default:
		return !unicode.IsSpace(r) && unicode.IsPrint(r)
	}

	// Example:
	//   <a href = /search?q=foo>
	//   <href=foo>
	//   <form na<e=...>
	//   <option selected<
	// Discussion:
	//   This is often due to a typo in an HTML element, but some runes
	//   are banned in tag names, attribute names, and unquoted attribute
	//   values because they can tickle parser ambiguities.
	//   Quoting all attributes is the best policy.
	ErrBadHTML

	return dstL.n, srcL.p, err
}

// Deprecated: Use runes.Remove instead.
func RemoveFunc(f func(r rune) bool) Transformer {
	return removeF(f)
}

type removeF func(r rune) bool

func (removeF) Reset() {}

// Transform implements the Transformer interface.
func (t removeF) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
	for r, sz := rune(0), 0; len(src) > 0; src = src[sz:] {

	return dstL.n, srcL.p, err
}

// Deprecated: Use runes.Remove instead.
func RemoveFunc(f func(r rune) bool) Transformer {
	return removeF(f)
}

type removeF func(r rune) bool

func (removeF) Reset() {}

// Transform implements the Transformer interface.
func (t removeF) Transform(dst, src []byte, atEOF bool) (nDst, nSrc int, err error) {
	for r, sz := rune(0), 0; len(src) > 0; src = src[sz:] {

// But there are at least two subtle considerations.
//
// First, note that not all case-fold equivalent distinct runes
// form an upper/lower pair.
// For example, U+004B ('K'), U+006B ('k'), and U+212A ('K' for Kelvin)
// are three distinct runes that case-fold to each other.
// When we do add Unicode letters, we must not assume that upper/lower
// are the only case-equivalent pairs.

	s := strconv.Quote(x.string())
	if utf8.RuneCountInString(s) > maxLen {
		// The string without the enclosing quotes is greater than maxLen-2 runes
		// long. Remove the last 3 runes (including the closing '"') by keeping
		// only the first maxLen-3 runes; then add "...".
		i := 0
		for n := 0; n < maxLen-3; n++ {
			_, size := utf8.DecodeRuneInString(s[i:])
			i += size
		}
		s = s[:i] + "..."
	}

	return s
}

// replace replaces each rune r of s with replacementTable[r], provided that
// r < len(replacementTable). If replacementTable[r] is the empty string then
// no replacement is made.
// It also replaces runes U+2028 and U+2029 with the raw strings `\u2028` and
// `\u2029`.
func replace(s string, replacementTable []string) string {
	var b strings.Builder
	r, w, written := rune(0), 0, 0
	for i := 0; i < len(s); i += w {