// I \u0300 (Ì) → i \u0307 \u0300;
	// I \u0301 (Í) → i \u0307 \u0301;
	// I \u0303 (Ĩ) → i \u0307 \u0303;
	// ::Any-Lower();
	// ::NFC();

	i := 0
	if r := c.src[c.pSrc]; r < utf8.RuneSelf {
		lower(c)
		if r != 'I' && r != 'J' {
			return true
		}
	} else {
		p := norm.NFD.Properties(c.src[c.pSrc:])
		if d := p.Decomposition(); len(d) >= 3 && (d[0] == 'I' || d[0] == 'J') {

	return '!' <= r && r <= '~' || isMultibyte(r)
}

// isMultibyte reports whether r is a multi-byte UTF-8 character
// as supported by RFC 6532.
func isMultibyte(r rune) bool {
	return r >= utf8.RuneSelf
}

// isWSP reports whether r is a WSP (white space).
// WSP is a space or horizontal tab (RFC 5234 Appendix B).
func isWSP(r rune) bool {
	return r == ' ' || r == '\t'
}

		re := re.Copy()
		for pb.Next() {
			re.Match(x)
		}
	})
}

var sink string

func BenchmarkQuoteMetaAll(b *testing.B) {
	specials := make([]byte, 0)
	for i := byte(0); i < utf8.RuneSelf; i++ {
		if special(i) {
			specials = append(specials, i)
		}
	}
	s := string(specials)
	b.SetBytes(int64(len(s)))
	b.ResetTimer()
	for i := 0; i < b.N; i++ {
		sink = QuoteMeta(s)
	}
}

func (d *Decoder) readName() (ok bool) {
	var b byte
	if b, ok = d.mustgetc(); !ok {
		return
	}
	if b < utf8.RuneSelf && !isNameByte(b) {
		d.ungetc(b)
		return false
	}
	d.buf.WriteByte(b)

	for {
		if b, ok = d.mustgetc(); !ok {
			return
		}
		if b < utf8.RuneSelf && !isNameByte(b) {
			d.ungetc(b)
			break
		}
		d.buf.WriteByte(b)
	}
	return true
}

// that package, since we can't take a dependency on either.
const (
	lowerhex  = "0123456789abcdef"
	runeSelf  = 0x80
	runeError = '\uFFFD'
)

func quote(s string) string {
	buf := make([]byte, 1, len(s)+2) // slice will be at least len(s) + quotes
	buf[0] = '"'
	for i, c := range s {
		if c >= runeSelf || c < ' ' {
			// This means you are asking us to parse a time.Duration or

// 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:] {

		if r = rune(src[0]); r < utf8.RuneSelf {
			sz = 1
		} else {
			r, sz = utf8.DecodeRune(src)

			if sz == 1 {
				// Invalid rune.
				if !atEOF && !utf8.FullRune(src) {
					err = ErrShortSrc
					break
				}

	{"\u0250\u0250\u0250\u0250\u0250", []byte("\u2C6F\u2C6F\u2C6F\u2C6F\u2C6F")}, // grows one byte per char
	{"a\u0080\U0010FFFF", []byte("A\u0080\U0010FFFF")},                           // test utf8.RuneSelf and utf8.MaxRune
}

var lowerTests = []StringTest{
	{"", []byte("")},
	{"abc", []byte("abc")},
	{"AbC123", []byte("abc123")},
	{"azAZ09_", []byte("azaz09_")},

func safeCgoName(s string) bool {
	if s == "" {
		return false
	}
	for i := 0; i < len(s); i++ {
		if c := s[i]; c < utf8.RuneSelf && strings.IndexByte(safeString, c) < 0 {
			return false
		}
	}
	return true
}

// splitQuoted splits the string s around each instance of one or more consecutive

func assumedPackageName(importPath string) string {
	notIdentifier := func(ch rune) bool {
		return !('a' <= ch && ch <= 'z' || 'A' <= ch && ch <= 'Z' ||
			'0' <= ch && ch <= '9' ||
			ch == '_' ||
			ch >= utf8.RuneSelf && (unicode.IsLetter(ch) || unicode.IsDigit(ch)))
	}

	base := path.Base(importPath)
	if strings.HasPrefix(base, "v") {
		if _, err := strconv.Atoi(base[1:]); err == nil {
			dir := path.Dir(importPath)

func strToFold(s string) string {
	// Fast path: all ASCII, no upper case.
	// Most paths look like this already.
	for i := 0; i < len(s); i++ {
		c := s[i]
		if c >= utf8.RuneSelf || 'A' <= c && c <= 'Z' {
			goto Slow
		}
	}
	return s

Slow:
	var buf bytes.Buffer
	for _, r := range s {
		// SimpleFold(x) cycles to the next equivalent rune > x